/* ═══════════════════════════════════════════════════════════
   StudyFlow v2  ·  Final Polished Design System
   Font   : Inter  (Google Fonts)
   Theme  : Deep indigo gradient sidebar  ·  frosted-glass cards
            gradient stat tiles  ·  smooth animations everywhere
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,400&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* brand */
  --p1:#6366f1; --p2:#7c3aed; --p3:#818cf8;
  --p-dark:#312e81; --p-deep:#1e1b4b;
  --p-xl:#c7d2fe;   --p-bg:rgba(99,102,241,.08);

  /* semantic */
  --sky:#0ea5e9;    --sky-bg:#e0f2fe;
  --emerald:#10b981;--emerald-bg:#d1fae5;
  --amber:#f59e0b;  --amber-bg:#fef3c7;
  --rose:#f43f5e;   --rose-bg:#ffe4e6;
  --violet:#8b5cf6; --violet-bg:#f3e8ff;

  /* neutrals */
  --bg:#eef2ff;
  --surface:#ffffff;  --surface-2:#f8faff;
  --glass:rgba(255,255,255,.82);
  --glass-b:rgba(255,255,255,.60);
  --border:#e2e8f0;   --border-l:#f1f5f9;

  /* text */
  --t1:#0f172a; --t2:#475569; --t3:#94a3b8;

  /* sidebar */
  --sb-w:260px;

  /* shape */
  --r:16px; --r-m:12px; --r-s:9px; --r-xs:6px;

  /* elevation */
  --sh-xs:0 1px 2px rgba(0,0,0,.05);
  --sh-sm:0 1px 4px rgba(0,0,0,.06),0 4px 16px rgba(99,102,241,.10);
  --sh-md:0 4px 20px rgba(0,0,0,.08),0 14px 44px rgba(99,102,241,.14);
  --sh-lg:0 8px 36px rgba(0,0,0,.11),0 28px 70px rgba(99,102,241,.20);
  --sh-glow:0 0 0 3px rgba(99,102,241,.20);
  --sh-btn:0 4px 16px rgba(99,102,241,.38),0 1px 0 rgba(255,255,255,.15) inset;
}

/* ── Reset ─────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;height:100%}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--bg);
  background-image:
    radial-gradient(ellipse 900px 600px at 12% -8%,rgba(99,102,241,.13) 0%,transparent 62%),
    radial-gradient(ellipse 700px 500px at 92% 108%,rgba(124,58,237,.10) 0%,transparent 62%),
    radial-gradient(ellipse 500px 400px at 55% 50%,rgba(99,102,241,.04) 0%,transparent 70%);
  background-attachment:fixed;
  color:var(--t1);
  display:flex;min-height:100vh;
  font-size:14px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:var(--p1);text-decoration:none}
a:hover{text-decoration:underline}
button,input,select,textarea{font-family:inherit;cursor:pointer}
input,textarea{cursor:text}

/* ═══════════════════════════════════════════════════════════
   SIDEBAR
═══════════════════════════════════════════════════════════ */
.sidebar{
  width:var(--sb-w);
  background:linear-gradient(175deg,#1a1744 0%,#252073 32%,#3427a3 62%,#4c1d95 100%);
  position:fixed;height:100vh;top:0;left:0;z-index:300;
  display:flex;flex-direction:column;
  overflow:hidden;
  box-shadow:4px 0 40px rgba(0,0,0,.25);
}

/* ambient glow blobs */
.sidebar::before{
  content:'';position:absolute;
  width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(139,92,246,.30) 0%,transparent 68%);
  top:-130px;right:-140px;pointer-events:none;
  animation:blobPulse 8s ease-in-out infinite;
}
.sidebar::after{
  content:'';position:absolute;
  width:290px;height:290px;border-radius:50%;
  background:radial-gradient(circle,rgba(99,102,241,.24) 0%,transparent 68%);
  bottom:20px;left:-100px;pointer-events:none;
  animation:blobPulse 10s ease-in-out infinite reverse;
}
@keyframes blobPulse{
  0%,100%{transform:scale(1)   opacity:.8}
  50%    {transform:scale(1.12);opacity:1}
}

/* brand */
.sidebar-brand{
  display:flex;align-items:center;gap:13px;
  padding:28px 20px 24px;
  position:relative;z-index:1;
  border-bottom:1px solid rgba(255,255,255,.09);
}
.brand-logo{
  width:46px;height:46px;flex-shrink:0;
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  box-shadow:0 4px 20px rgba(99,102,241,.60),0 0 0 1px rgba(255,255,255,.20) inset;
  transition:transform .32s cubic-bezier(.34,1.56,.64,1),box-shadow .32s;
}
.brand-logo-img{
  width:100%;height:100%;object-fit:cover;display:block;border-radius:14px;
}
.sidebar-brand:hover .brand-logo{
  transform:rotate(-8deg) scale(1.10);
  box-shadow:0 6px 28px rgba(99,102,241,.75),0 0 0 1px rgba(255,255,255,.22) inset;
}
.brand-text{line-height:1.25}
.brand-name{font-size:19px;font-weight:800;color:#fff;letter-spacing:-.4px;display:block}
.brand-sub{font-size:10px;font-weight:500;color:rgba(167,139,250,.60);text-transform:uppercase;letter-spacing:.09em}

/* nav label */
.nav-section-label{
  font-size:9.5px;font-weight:700;color:rgba(167,139,250,.42);
  text-transform:uppercase;letter-spacing:.14em;
  padding:18px 20px 6px;position:relative;z-index:1;
}

.nav-links{list-style:none;padding:4px 10px;flex:1;position:relative;z-index:1}
.nav-links li{margin-bottom:2px}

.nav-item{
  display:flex;align-items:center;gap:11px;
  padding:11px 13px;border-radius:var(--r-s);
  color:rgba(199,210,254,.64);font-weight:500;font-size:14px;
  transition:background .2s,color .2s,transform .18s,box-shadow .2s;
  text-decoration:none;position:relative;overflow:hidden;
}
.nav-item:hover{
  background:rgba(255,255,255,.09);
  color:#fff;text-decoration:none;
  transform:translateX(3px);
}
.nav-item.active{
  background:rgba(99,102,241,.32);color:#fff;
  box-shadow:inset 0 0 0 1px rgba(167,139,250,.28),0 2px 16px rgba(99,102,241,.25);
}
.nav-item.active::after{
  content:'';position:absolute;right:0;top:16%;height:68%;width:3.5px;
  background:linear-gradient(180deg,var(--p-xl),var(--p1));
  border-radius:99px 0 0 99px;
}

.nav-icon{
  width:35px;height:35px;border-radius:10px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:17px;
  background:rgba(255,255,255,.08);
  transition:background .2s,transform .2s,box-shadow .2s;
}
.nav-item.active .nav-icon{
  background:linear-gradient(135deg,var(--p1),var(--p2));
  box-shadow:0 3px 14px rgba(99,102,241,.55);
  transform:scale(1.05);
}
.nav-item:hover:not(.active) .nav-icon{background:rgba(255,255,255,.15)}

/* sidebar bottom */
.sidebar-footer{
  padding:14px;position:relative;z-index:1;
  border-top:1px solid rgba(255,255,255,.08);
  margin-top:auto;
}
.sidebar-user{
  display:flex;align-items:center;gap:11px;
  padding:11px 13px;
  background:rgba(255,255,255,.08);
  border-radius:var(--r-s);
  border:1px solid rgba(255,255,255,.11);
  transition:background .2s;
}
.sidebar-user:hover{background:rgba(255,255,255,.12)}
.user-avatar{
  width:36px;height:36px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--p1),var(--p2));
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;color:#fff;
  box-shadow:0 2px 10px rgba(99,102,241,.45);
}
.user-name{font-size:13px;font-weight:700;color:#fff;line-height:1.25}
.user-role{font-size:10.5px;color:rgba(167,139,250,.60)}

/* ═══════════════════════════════════════════════════════════
   MAIN CONTENT
═══════════════════════════════════════════════════════════ */
.main-content{
  margin-left:var(--sb-w);flex:1;
  padding:36px 40px 60px;
  max-width:calc(100vw - var(--sb-w));
  min-height:100vh;
}

/* ── Page Header ─────────────────────────────────────────── */
.page-header{
  display:flex;align-items:flex-start;justify-content:space-between;
  margin-bottom:32px;gap:16px;
}
.back-link{
  display:inline-flex;align-items:center;gap:5px;
  font-size:13px;color:var(--t2);margin-bottom:7px;
  transition:color .15s,gap .15s;
}
.back-link:hover{color:var(--p1);text-decoration:none;gap:8px}
.page-title{
  font-size:30px;font-weight:800;color:var(--t1);
  letter-spacing:-.6px;display:flex;align-items:center;
  gap:12px;line-height:1.2;
}
.page-sub{color:var(--t2);margin-top:5px;font-size:14px;font-weight:400}

.subject-pill{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:14px;
  color:#fff;font-size:20px;font-weight:800;flex-shrink:0;
  box-shadow:0 4px 16px rgba(0,0,0,.24);
}

/* ═══════════════════════════════════════════════════════════
   BUTTONS
═══════════════════════════════════════════════════════════ */
.btn{
  display:inline-flex;align-items:center;gap:7px;
  padding:10px 22px;border-radius:var(--r-s);
  font-weight:600;font-size:13.5px;
  border:1.5px solid transparent;
  transition:all .18s cubic-bezier(.22,1,.36,1);
  text-decoration:none;white-space:nowrap;
  position:relative;overflow:hidden;
  -webkit-user-select:none;user-select:none;
  letter-spacing:-.01em;
}
.btn::before{
  content:'';position:absolute;inset:0;
  background:rgba(255,255,255,.10);opacity:0;
  transition:opacity .18s;
}
.btn:hover::before{opacity:1}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0) scale(.98)}

.btn-primary{
  background:linear-gradient(135deg,var(--p1) 0%,var(--p2) 100%);
  color:#fff;box-shadow:var(--sh-btn);
}
.btn-primary:hover{box-shadow:0 6px 26px rgba(99,102,241,.52)}

.btn-ghost{
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  color:var(--t2);border-color:var(--border);
  box-shadow:var(--sh-sm);
}
.btn-ghost:hover{background:#fff;color:var(--t1);box-shadow:var(--sh-md)}

.btn-outline{
  background:transparent;color:var(--p1);
  border-color:rgba(99,102,241,.42);
}
.btn-outline:hover{background:rgba(99,102,241,.07);border-color:var(--p1)}

.btn-sm{padding:6px 14px;font-size:12px;border-radius:var(--r-xs)}
.btn-group{display:flex;gap:8px;align-items:center}

.btn-toggle{background:#ecfdf5;color:#059669;border-color:#a7f3d0}
.btn-toggle:hover{background:#d1fae5;transform:translateY(-1px)}
.btn-undo{background:var(--amber-bg);color:#92400e;border-color:#fde68a}
.btn-danger{background:var(--rose-bg);color:var(--rose);border-color:#fecdd3}
.btn-danger:hover{background:#ffdde1}
.btn-icon{background:transparent;border:none;padding:6px 9px;font-size:15px;border-radius:var(--r-xs);transition:background .15s,color .15s}
.btn-danger-ghost{color:var(--t3)}
.btn-danger-ghost:hover{color:var(--rose);background:var(--rose-bg)}

/* ═══════════════════════════════════════════════════════════
   CARDS
═══════════════════════════════════════════════════════════ */
.card{
  background:var(--glass);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid var(--glass-b);
  border-radius:var(--r);
  padding:28px;
  box-shadow:var(--sh-sm);
  transition:box-shadow .28s,transform .28s;
}
.card:hover{box-shadow:var(--sh-md)}
.card-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:22px;
}
.card-title{
  font-size:15.5px;font-weight:700;color:var(--t1);
  display:flex;align-items:center;gap:9px;
}
.card-icon{
  width:32px;height:32px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;font-size:15px;
}

/* ═══════════════════════════════════════════════════════════
   STAT CARDS
═══════════════════════════════════════════════════════════ */
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;margin-bottom:26px;
}

.stat-card{
  border-radius:var(--r);padding:26px;
  position:relative;overflow:hidden;
  box-shadow:var(--sh-sm);
  transition:transform .28s cubic-bezier(.22,1,.36,1),box-shadow .28s;
  cursor:default;
}
.stat-card::before{
  content:'';position:absolute;
  top:-48px;right:-48px;
  width:148px;height:148px;border-radius:50%;
  background:rgba(255,255,255,.15);
  transition:transform .4s;
}
.stat-card::after{
  content:'';position:absolute;
  bottom:-30px;right:14px;
  width:90px;height:90px;border-radius:50%;
  background:rgba(255,255,255,.09);
}
.stat-card:hover{transform:translateY(-6px);box-shadow:var(--sh-lg)}
.stat-card:hover::before{transform:scale(1.15)}

.stat-card.stat-blue  {background:linear-gradient(135deg,#0ea5e9 0%,#0369a1 100%)}
.stat-card.stat-violet{background:linear-gradient(135deg,#8b5cf6 0%,#5b21b6 100%)}
.stat-card.stat-amber {background:linear-gradient(135deg,#f59e0b 0%,#b45309 100%)}
.stat-card.stat-green {background:linear-gradient(135deg,#10b981 0%,#065f46 100%)}

.stat-icon-wrap{
  width:52px;height:52px;
  background:rgba(255,255,255,.24);
  border-radius:15px;
  display:flex;align-items:center;justify-content:center;
  font-size:26px;margin-bottom:16px;
  position:relative;z-index:1;
  box-shadow:0 2px 10px rgba(0,0,0,.10) inset;
}
.stat-number{
  font-size:42px;font-weight:900;color:#fff;
  line-height:1;letter-spacing:-2px;
  margin-bottom:5px;position:relative;z-index:1;
}
.stat-label{
  font-size:11.5px;color:rgba(255,255,255,.76);font-weight:600;
  position:relative;z-index:1;
  text-transform:uppercase;letter-spacing:.06em;
}

/* ═══════════════════════════════════════════════════════════
   PROGRESS BAR
═══════════════════════════════════════════════════════════ */
.progress-card{margin-bottom:26px}
.progress-header-row{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:16px;
}
.progress-pct{
  font-size:34px;font-weight:900;letter-spacing:-1.5px;
  background:linear-gradient(135deg,var(--p1),var(--p2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.progress-track{
  height:14px;background:var(--border-l);border:1px solid var(--border);
  border-radius:99px;overflow:hidden;margin-bottom:12px;
  position:relative;
}
.progress-fill{
  height:100%;border-radius:99px;
  background:linear-gradient(90deg,var(--p1),var(--p3),var(--p2));
  background-size:300% 100%;
  animation:barShimmer 5s linear infinite;
  transition:width 1.5s cubic-bezier(.22,1,.36,1);
  position:relative;
}
.progress-fill::after{
  content:'';position:absolute;right:0;top:0;
  width:32px;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.5));
  border-radius:99px;
  animation:barGlow 2s ease-in-out infinite;
}
@keyframes barShimmer{0%{background-position:0% 50%}100%{background-position:300% 50%}}
@keyframes barGlow{0%,100%{opacity:0}50%{opacity:1}}
.progress-meta{
  display:flex;justify-content:space-between;
  font-size:13px;color:var(--t2);font-weight:500;
}

/* ═══════════════════════════════════════════════════════════
   LAYOUT
═══════════════════════════════════════════════════════════ */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}

/* ═══════════════════════════════════════════════════════════
   DEADLINE LIST
═══════════════════════════════════════════════════════════ */
.deadline-list{display:flex;flex-direction:column;gap:10px}
.deadline-item{
  display:flex;align-items:center;gap:13px;
  padding:13px 15px;
  background:var(--surface-2);
  border-radius:var(--r-m);
  border:1px solid var(--border-l);
  transition:all .22s cubic-bezier(.22,1,.36,1);
}
.deadline-item:hover{
  background:#fff;transform:translateX(4px);
  box-shadow:var(--sh-sm);
  border-color:rgba(99,102,241,.18);
}
.deadline-color-bar{width:5px;height:40px;border-radius:99px;flex-shrink:0}
.deadline-info{flex:1;min-width:0}
.deadline-topic{font-weight:700;font-size:13.5px;color:var(--t1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.deadline-subject{font-size:12px;color:var(--t3);margin-top:2px;font-weight:500}
.deadline-right{text-align:right;flex-shrink:0}
.deadline-date{
  font-size:11.5px;font-weight:700;color:var(--t2);
  background:var(--border-l);border:1px solid var(--border);
  padding:3px 9px;border-radius:var(--r-xs);
  display:inline-block;margin-bottom:5px;
}

/* ─ Stars ──────────────────────────────────────────────────── */
.difficulty-stars,.difficulty-display{display:flex;gap:2px}
.star{font-size:13px;color:#e2e8f0}
.star-on{color:var(--amber)}

/* ═══════════════════════════════════════════════════════════
   SUBJECT OVERVIEW  (dashboard card)
═══════════════════════════════════════════════════════════ */
.subject-overview-list{display:flex;flex-direction:column;gap:11px}
.subject-overview-item{
  display:flex;align-items:center;gap:13px;
  padding:10px 12px;border-radius:var(--r-m);
  transition:background .16s;
}
.subject-overview-item:hover{background:var(--surface-2)}
.subject-color-circle{
  width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:800;color:#fff;flex-shrink:0;
  box-shadow:0 3px 12px rgba(0,0,0,.24);
}
.subject-info{flex:1;min-width:0}
.subject-link{font-weight:700;font-size:13.5px;color:var(--t1);display:block;margin-bottom:5px}
.subject-link:hover{color:var(--p1);text-decoration:none}
.subject-progress-mini{display:flex;align-items:center;gap:9px}
.mini-bar{flex:1;height:6px;background:var(--border);border-radius:99px;overflow:hidden}
.mini-fill{height:100%;border-radius:99px;transition:width 1.4s cubic-bezier(.22,1,.36,1)}
.mini-count{font-size:11.5px;color:var(--t3);white-space:nowrap;font-weight:600}

/* ═══════════════════════════════════════════════════════════
   SUBJECTS GRID
═══════════════════════════════════════════════════════════ */
.subjects-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(285px,1fr));
  gap:22px;
}
.subject-card{
  background:var(--glass);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--glass-b);border-radius:var(--r);
  overflow:hidden;display:flex;flex-direction:column;
  box-shadow:var(--sh-sm);
  transition:transform .28s cubic-bezier(.22,1,.36,1),box-shadow .28s;
}
.subject-card:hover{transform:translateY(-6px);box-shadow:var(--sh-lg)}

.subject-card-top{height:5px;background:var(--subject-color,var(--p1))}
.subject-card-body{padding:24px 24px 22px;flex:1;display:flex;flex-direction:column}

.subject-card-header{
  display:flex;justify-content:space-between;align-items:flex-start;
  margin-bottom:15px;
}
.subject-badge{
  width:56px;height:56px;border-radius:17px;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:25px;font-weight:800;
  box-shadow:0 4px 18px rgba(0,0,0,.28);
}
.subject-card-name{font-size:18px;font-weight:800;color:var(--t1);margin-bottom:6px;letter-spacing:-.3px}
.subject-card-stats{font-size:12.5px;color:var(--t2);margin-bottom:16px;display:flex;gap:6px;align-items:center}
.dot-sep{color:var(--t3)}
.subject-progress{height:8px;background:var(--border-l);border-radius:99px;overflow:hidden;margin-bottom:18px}
.subject-progress-fill{height:100%;border-radius:99px;transition:width 1.4s cubic-bezier(.22,1,.36,1)}
.subject-btn{width:100%;justify-content:center;margin-top:auto}

/* ═══════════════════════════════════════════════════════════
   TABLE CARD
═══════════════════════════════════════════════════════════ */
.table-card{
  background:var(--glass);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--glass-b);
  border-radius:var(--r);overflow:hidden;
  box-shadow:var(--sh-sm);
}

.topics-table,.schedule-table{width:100%;border-collapse:collapse}

.topics-table thead tr,
.schedule-table thead tr{
  background:linear-gradient(90deg,rgba(99,102,241,.07),rgba(124,58,237,.04));
  border-bottom:2px solid rgba(99,102,241,.12);
}
.topics-table th,.schedule-table th{
  padding:13px 16px;text-align:left;
  font-size:11px;font-weight:700;color:var(--t2);
  text-transform:uppercase;letter-spacing:.08em;
}
.topics-table td,.schedule-table td{
  padding:14px 16px;
  border-bottom:1px solid rgba(226,232,240,.55);
  vertical-align:middle;
}
.topics-table tr:last-child td,
.schedule-table tr:last-child td{border-bottom:none}

.topic-row,.sched-row{transition:background .14s}
.topic-row:hover td,.sched-row:hover td{background:rgba(99,102,241,.035)}

.row-done td{opacity:.52}
.topic-name{font-weight:600;font-size:13.5px}

/* schedule row variants */
.sched-completed td{opacity:.48}
.sched-revision td{background:linear-gradient(90deg,rgba(245,158,11,.06),transparent)!important}
.sched-today td{background:linear-gradient(90deg,rgba(99,102,241,.07),transparent)!important}

/* date column */
.date-cell{
  vertical-align:top!important;padding-top:18px!important;
  width:90px;text-align:center;
  border-right:2px solid rgba(99,102,241,.08)!important;
}
.date-block{display:inline-flex;flex-direction:column;align-items:center;gap:2px}
.date-day-num{font-size:33px;font-weight:900;line-height:1;letter-spacing:-1px}
.date-month{font-size:11px;font-weight:700;color:var(--t3);text-transform:uppercase;letter-spacing:.07em}
.date-past   .date-day-num{color:var(--t3)}
.date-today  .date-day-num{
  background:linear-gradient(135deg,var(--p1),var(--p2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.date-future .date-day-num{color:var(--t1)}
.today-badge{
  background:linear-gradient(135deg,var(--p1),var(--p2));color:#fff;
  font-size:9px;font-weight:700;padding:2px 8px;
  border-radius:99px;text-transform:uppercase;letter-spacing:.07em;
  margin-top:4px;
  box-shadow:0 2px 10px rgba(99,102,241,.45);
  animation:todayPulse 2.5s ease-in-out infinite;
}
@keyframes todayPulse{
  0%,100%{box-shadow:0 2px 10px rgba(99,102,241,.40)}
  50%    {box-shadow:0 2px 18px rgba(99,102,241,.65)}
}
.day-pill{font-size:11px;color:var(--t3)}
.actions-cell{display:flex;gap:6px;flex-wrap:nowrap;align-items:center}

/* ── Schedule summary bar ───────────────────────────────── */
.sched-summary{
  display:flex;gap:12px;margin-bottom:18px;flex-wrap:wrap;
}
.sched-stat{
  display:flex;align-items:center;gap:8px;
  padding:10px 16px;
  background:var(--glass);
  backdrop-filter:blur(10px);
  border:1px solid var(--glass-b);
  border-radius:var(--r-m);
  box-shadow:var(--sh-xs);
  font-size:13px;font-weight:600;color:var(--t2);
}
.sched-stat-num{font-size:20px;font-weight:800;color:var(--t1);letter-spacing:-.5px}
.sched-stat-label{font-size:11px;color:var(--t3);margin-top:1px}

/* ═══════════════════════════════════════════════════════════
   BADGES & CHIPS
═══════════════════════════════════════════════════════════ */
.badge{
  display:inline-block;padding:4px 12px;border-radius:99px;
  font-size:12px;font-weight:700;
}
.badge-primary{background:rgba(99,102,241,.12);color:var(--p1)}
.badge-amber{background:var(--amber-bg);color:#92400e}

.deadline-chip{
  display:inline-flex;align-items:center;gap:4px;
  padding:4px 10px;border-radius:var(--r-xs);
  font-size:12px;font-weight:700;
}
.chip-future {background:#f0fdf4;color:#166534}
.chip-today  {background:rgba(99,102,241,.10);color:var(--p1)}
.chip-overdue{background:var(--rose-bg);color:var(--rose)}

.hours-chip{
  display:inline-block;
  background:var(--surface-2);border:1px solid var(--border);
  border-radius:var(--r-xs);padding:3px 10px;
  font-size:12px;font-weight:700;color:var(--t2);
}
.hours-daily{background:#f0fdf4;border-color:#bbf7d0;color:#166534}

.status-badge{
  display:inline-flex;align-items:center;gap:5px;
  padding:4px 12px;border-radius:99px;
  font-size:12px;font-weight:700;
}
.status-done   {background:#ecfdf5;color:#059669}
.status-pending{background:var(--amber-bg);color:#92400e}

.subject-tag{
  display:inline-flex;align-items:center;gap:5px;
  padding:4px 11px;border-radius:var(--r-xs);
  font-size:12px;font-weight:700;
}
.type-badge{
  display:inline-flex;align-items:center;gap:5px;
  padding:4px 12px;border-radius:var(--r-xs);
  font-size:12px;font-weight:700;
}
.type-study   {background:rgba(14,165,233,.10);color:#0369a1}
.type-revision{background:var(--amber-bg);color:#92400e}

/* ═══════════════════════════════════════════════════════════
   STAR SELECTOR (form)
═══════════════════════════════════════════════════════════ */
.star-selector{display:flex;gap:6px;margin-bottom:5px}
.star-sel{
  font-size:28px;color:#e2e8f0;cursor:pointer;
  transition:color .12s,transform .15s cubic-bezier(.34,1.56,.64,1);
  line-height:1;
}
.star-sel:hover,.star-sel.active{color:var(--amber);transform:scale(1.25)}

/* ═══════════════════════════════════════════════════════════
   FORMS
═══════════════════════════════════════════════════════════ */
.form-group{display:flex;flex-direction:column;gap:7px;margin-bottom:18px}
.form-grow{flex:1}
.form-label{font-size:13px;font-weight:700;color:var(--t2)}
.form-input{
  padding:11px 14px;
  border:1.5px solid var(--border);border-radius:var(--r-s);
  font-size:14px;background:var(--surface);color:var(--t1);
  transition:border-color .18s,box-shadow .18s,background .18s;outline:none;
}
.form-input:focus{border-color:var(--p1);box-shadow:var(--sh-glow);background:#fff}
.form-input::placeholder{color:var(--t3)}
.form-row{display:flex;gap:16px;flex-wrap:wrap}

/* colour picker */
.color-options{display:flex;gap:12px;flex-wrap:wrap}
.color-opt input[type="radio"]{display:none}
.color-swatch{
  display:block;width:32px;height:32px;border-radius:50%;
  cursor:pointer;border:3px solid transparent;
  transition:transform .22s cubic-bezier(.34,1.56,.64,1),box-shadow .22s;
}
.color-opt input:checked + .color-swatch{
  border-color:#fff;
  box-shadow:0 0 0 2.5px var(--p1),0 4px 16px rgba(0,0,0,.30);
  transform:scale(1.18);
}
.color-swatch:hover{transform:scale(1.18)}

/* ═══════════════════════════════════════════════════════════
   MODAL
═══════════════════════════════════════════════════════════ */
.modal-overlay{
  display:none;position:fixed;inset:0;
  background:rgba(15,23,42,.55);
  z-index:1000;align-items:center;justify-content:center;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.modal-overlay.open{display:flex}

.modal{
  background:var(--surface);
  border-radius:var(--r);padding:32px;
  width:100%;max-width:495px;
  box-shadow:0 34px 88px rgba(0,0,0,.30),0 0 0 1px rgba(255,255,255,.55) inset;
  animation:modalPop .28s cubic-bezier(.22,1,.36,1);
}
.modal-wide{max-width:680px}

@keyframes modalPop{
  from{opacity:0;transform:translateY(-24px) scale(.94)}
  to  {opacity:1;transform:translateY(0)     scale(1)}
}

.modal-header{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:26px;padding-bottom:18px;
  border-bottom:1px solid var(--border-l);
}
.modal-header h3{font-size:20px;font-weight:800;color:var(--t1)}
.modal-header em{color:var(--p1);font-style:normal}
.modal-close{
  width:34px;height:34px;border-radius:var(--r-s);
  background:var(--border-l);border:none;
  font-size:16px;color:var(--t2);
  display:flex;align-items:center;justify-content:center;
  transition:all .20s cubic-bezier(.22,1,.36,1);
}
.modal-close:hover{background:var(--rose-bg);color:var(--rose);transform:rotate(90deg)}
.modal-footer{
  display:flex;justify-content:flex-end;gap:10px;
  margin-top:26px;padding-top:20px;
  border-top:1px solid var(--border-l);
}

/* ═══════════════════════════════════════════════════════════
   FLASH MESSAGES
═══════════════════════════════════════════════════════════ */
.flash-container{margin-bottom:22px;display:flex;flex-direction:column;gap:8px}
.flash{
  display:flex;justify-content:space-between;align-items:center;
  padding:13px 18px;border-radius:var(--r-m);
  font-size:13.5px;font-weight:600;
  animation:flashIn .32s cubic-bezier(.22,1,.36,1);
  border-left:4px solid;box-shadow:var(--sh-sm);
}
@keyframes flashIn{from{opacity:0;transform:translateX(-16px)}to{opacity:1;transform:translateX(0)}}
.flash-success{background:#f0fdf4;color:#166534;border-color:var(--emerald)}
.flash-error  {background:var(--rose-bg);color:#9f1239;border-color:var(--rose)}
.flash-info   {background:rgba(99,102,241,.08);color:var(--p-dark);border-color:var(--p1)}
.flash-close  {background:none;border:none;font-size:16px;opacity:.5;transition:opacity .15s}
.flash-close:hover{opacity:1}

/* ═══════════════════════════════════════════════════════════
   LEGEND
═══════════════════════════════════════════════════════════ */
.legend-row{
  display:flex;gap:20px;margin-bottom:16px;
  padding:11px 18px;
  background:var(--glass);backdrop-filter:blur(10px);
  border:1px solid var(--glass-b);
  border-radius:var(--r-m);width:fit-content;
  box-shadow:var(--sh-xs);
}
.legend-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t2);font-weight:500}
.legend-dot{width:12px;height:12px;border-radius:3px}
.dot-study   {background:rgba(14,165,233,.15);border:1.5px solid rgba(14,165,233,.4)}
.dot-revision{background:var(--amber-bg);border:1.5px solid #fde68a}
.dot-done    {background:var(--border-l);border:1.5px solid var(--border)}

/* ═══════════════════════════════════════════════════════════
   EMPTY STATES
═══════════════════════════════════════════════════════════ */
.empty-state{text-align:center;padding:30px 20px;color:var(--t3)}
.empty-state .empty-icon{font-size:44px;margin-bottom:10px;display:block}

.empty-full{
  text-align:center;padding:90px 24px;
}
.empty-full-icon{
  font-size:72px;margin-bottom:20px;display:block;
  animation:emptyBob 3s ease-in-out infinite;
}
@keyframes emptyBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.empty-full h2{font-size:24px;font-weight:800;color:var(--t2);margin-bottom:9px}
.empty-full p {font-size:14.5px;color:var(--t3);margin-bottom:28px;line-height:1.7}
.empty-actions{display:flex;gap:12px;justify-content:center}

/* ═══════════════════════════════════════════════════════════
   MISC
═══════════════════════════════════════════════════════════ */
.strikethrough{text-decoration:line-through;opacity:.50}
.text-muted{color:var(--t3)}

/* custom scrollbar */
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}
::-webkit-scrollbar-thumb:hover{background:var(--t3)}

/* ═══════════════════════════════════════════════════════════
   ENTRANCE ANIMATIONS
═══════════════════════════════════════════════════════════ */
@keyframes fadeUp{
  from{opacity:0;transform:translateY(20px)}
  to  {opacity:1;transform:translateY(0)}
}
.anim{animation:fadeUp .48s cubic-bezier(.22,1,.36,1) both}
.d1{animation-delay:.06s}
.d2{animation-delay:.12s}
.d3{animation-delay:.18s}
.d4{animation-delay:.24s}
.d5{animation-delay:.30s}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════ */
@media(max-width:1200px){.stats-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:960px) {.two-col{grid-template-columns:1fr}}
@media(max-width:800px){
  :root{--sb-w:220px}
  .main-content{padding:22px 18px 40px}
  .page-title{font-size:23px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat-number{font-size:34px}
  .stat-icon-wrap{width:44px;height:44px;font-size:22px}
}

/* ═══════════════════════════════════════════════════════════
   OLLAMA AI FEATURES
   Floating Chat · Topic Tips · Schedule Insights · Dashboard Advisor
═══════════════════════════════════════════════════════════ */

/* ── Floating Chat Button ──────────────────────────────── */
.ai-fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9000;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  border: none;
  box-shadow: 0 6px 28px rgba(99,102,241,.5), 0 2px 8px rgba(0,0,0,.2);
  color: #fff;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  animation: fabPop .5s cubic-bezier(.22,1,.36,1) .6s both;
}
@keyframes fabPop { from{transform:scale(0);opacity:0} to{transform:scale(1);opacity:1} }
.ai-fab:hover { transform: scale(1.08); box-shadow: 0 10px 36px rgba(99,102,241,.65); }
.ai-fab.chat-open { background: linear-gradient(135deg,#f43f5e,#ec4899); }

/* ── Floating Chat Panel ──────────────────────────────── */
.ai-chat-panel {
  position: fixed;
  bottom: 98px;
  right: 28px;
  z-index: 8999;
  width: 360px;
  max-height: 520px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,.18), 0 4px 20px rgba(99,102,241,.2);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(.9) translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: transform .25s cubic-bezier(.22,1,.36,1), opacity .2s;
}
.ai-chat-panel.open {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: all;
}
.ai-chat-header {
  padding: 16px 18px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}
.ai-chat-header .ai-dot {
  width: 9px; height: 9px;
  background: #86efac;
  border-radius: 50%;
  animation: aiPulse 2s infinite;
}
@keyframes aiPulse { 0%,100%{opacity:1} 50%{opacity:.4} }
.ai-chat-header-sub { font-size: 11px; opacity: .8; font-weight: 400; margin-top: 1px; }
.ai-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
}
.ai-msg {
  max-width: 88%;
  padding: 9px 13px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.55;
  animation: msgIn .2s ease;
}
@keyframes msgIn { from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:translateY(0)} }
.ai-msg-user {
  align-self: flex-end;
  background: linear-gradient(135deg, #6366f1, #818cf8);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.ai-msg-ai {
  align-self: flex-start;
  background: var(--surface-2);
  color: var(--t1);
  border: 1px solid var(--border-l);
  border-bottom-left-radius: 4px;
}
.ai-msg-ai ul { padding-left: 16px; margin-top: 4px; }
.ai-msg-ai li { margin-bottom: 3px; }
.ai-thinking {
  align-self: flex-start;
  display: flex;
  gap: 5px;
  padding: 10px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border-l);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
}
.ai-thinking span {
  width: 7px; height: 7px;
  background: var(--p3);
  border-radius: 50%;
  animation: aiThink .9s infinite;
}
.ai-thinking span:nth-child(2){animation-delay:.15s}
.ai-thinking span:nth-child(3){animation-delay:.30s}
@keyframes aiThink { 0%,80%,100%{transform:scale(.6);opacity:.4} 40%{transform:scale(1);opacity:1} }
.ai-chat-input-row {
  padding: 12px 14px;
  border-top: 1px solid var(--border-l);
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}
.ai-chat-input {
  flex: 1;
  padding: 9px 13px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  font-size: 13px;
  color: var(--t1);
  outline: none;
  transition: border-color .15s;
}
.ai-chat-input:focus { border-color: var(--p1); }
.ai-chat-send {
  padding: 9px 14px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: transform .15s, opacity .15s;
}
.ai-chat-send:hover { transform: scale(1.05); }
.ai-chat-send:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* ── AI Topic Tips Button & Panel ─────────────────────── */
.btn-ai-tips {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  background: linear-gradient(135deg,rgba(99,102,241,.12),rgba(139,92,246,.12));
  color: var(--p1);
  border: 1.5px solid rgba(99,102,241,.25);
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
}
.btn-ai-tips:hover { background: linear-gradient(135deg,rgba(99,102,241,.2),rgba(139,92,246,.2)); transform: scale(1.03); }
.btn-ai-tips .ai-sparkle { font-size: 14px; }

.ai-tips-drawer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s cubic-bezier(.22,1,.36,1), opacity .3s;
  opacity: 0;
}
.ai-tips-drawer.open { max-height: 500px; opacity: 1; }
.ai-tips-box {
  margin: 10px 0 6px;
  padding: 14px 16px;
  background: linear-gradient(135deg,rgba(99,102,241,.06),rgba(139,92,246,.04));
  border: 1.5px solid rgba(99,102,241,.18);
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--t1);
  white-space: pre-wrap;
}
.ai-tips-box-header {
  font-size: 12px;
  font-weight: 700;
  color: var(--p1);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.ai-tips-loading {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--t2);
  font-size: 13px;
}

/* ── AI Schedule Insights Banner ──────────────────────── */
.ai-insights-card {
  background: linear-gradient(135deg,rgba(99,102,241,.07),rgba(139,92,246,.05));
  border: 1.5px solid rgba(99,102,241,.2);
  border-radius: var(--r);
  padding: 20px 24px;
  margin-bottom: 20px;
}
.ai-insights-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.ai-insights-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  color: var(--p1);
}
.ai-insights-body {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--t1);
  white-space: pre-wrap;
}
.btn-ai-refresh {
  padding: 7px 14px;
  font-size: 12px;
  font-weight: 600;
  background: linear-gradient(135deg,#6366f1,#8b5cf6);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: transform .15s, opacity .15s;
}
.btn-ai-refresh:hover { transform: scale(1.05); }
.btn-ai-refresh:disabled { opacity: .6; cursor: not-allowed; transform: none; }

/* ── Dashboard AI Advisor Card ────────────────────────── */
.ai-advisor-card {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 60%, #a78bfa 100%);
  border-radius: var(--r);
  padding: 22px 26px;
  color: #fff;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(99,102,241,.4);
}
.ai-advisor-card::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
}
.ai-advisor-card::after {
  content: '';
  position: absolute;
  bottom: -20px; left: 40px;
  width: 130px; height: 130px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.ai-advisor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}
.ai-advisor-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 15.5px;
}
.ai-advisor-badge {
  background: rgba(255,255,255,.2);
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
}
.ai-advisor-body {
  font-size: 14px;
  line-height: 1.7;
  opacity: .95;
  white-space: pre-wrap;
  position: relative;
  z-index: 1;
}
.ai-advisor-body ul { padding-left: 18px; }
.ai-advisor-body li { margin-bottom: 4px; }
.ai-advisor-loading {
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: .8;
  font-size: 14px;
}
.ai-advisor-dots span {
  display: inline-block;
  width: 8px; height: 8px;
  background: #fff;
  border-radius: 50%;
  animation: aiThink .9s infinite;
  margin-right: 3px;
}
.ai-advisor-dots span:nth-child(2){animation-delay:.15s}
.ai-advisor-dots span:nth-child(3){animation-delay:.30s}
.btn-ai-refresh-white {
  padding: 7px 14px;
  font-size: 12px;
  font-weight: 700;
  background: rgba(255,255,255,.2);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.35);
  border-radius: 8px;
  cursor: pointer;
  transition: background .15s, transform .15s;
}
.btn-ai-refresh-white:hover { background: rgba(255,255,255,.3); transform: scale(1.05); }
.btn-ai-refresh-white:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* ═══════════════════════════════════════════════════════════
   PHASE 1 FEATURES
   Step 1: Deadline Countdown · Step 2: Dark Mode · Step 3: Search & Filter
═══════════════════════════════════════════════════════════ */

/* ── Step 1: Deadline Countdown Chips ─────────────────── */
.deadline-countdown {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .02em;
  padding: 2px 7px;
  border-radius: 20px;
  display: inline-block;
  white-space: nowrap;
}
.countdown-urgent  { background: #ffe4e6; color: #be123c; border: 1px solid #fecdd3; }
.countdown-warning { background: #fef3c7; color: #b45309; border: 1px solid #fde68a; }
.countdown-ok      { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.countdown-today   { background: #6366f1; color: #fff;    border: 1px solid #6366f1; }
.countdown-overdue { background: #be123c; color: #fff;    border: 1px solid #be123c; }

/* ── Step 2: Dark Mode Toggle ──────────────────────────── */
.dark-mode-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  padding: 10px 14px;
  color: rgba(255,255,255,.85);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 12px;
  transition: background .2s;
  font-family: inherit;
}
.dark-mode-toggle:hover { background: rgba(255,255,255,.14); }
.dm-icon-sun { font-size: 16px; flex-shrink: 0; }
.dm-label { flex: 1; text-align: left; }
.dm-switch {
  width: 34px; height: 18px;
  background: rgba(255,255,255,.2);
  border-radius: 99px;
  position: relative;
  flex-shrink: 0;
  transition: background .25s;
}
.dm-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  transition: transform .25s cubic-bezier(.22,1,.36,1);
  box-shadow: 0 1px 4px rgba(0,0,0,.3);
}
[data-theme="dark"] .dm-switch  { background: #818cf8; }
[data-theme="dark"] .dm-thumb   { transform: translateX(16px); }
[data-theme="dark"] .dm-icon-sun::before { content: '🌙'; }
[data-theme="dark"] .dm-label   { opacity: .9; }

/* ── Step 2: Dark Mode CSS Variables Override ──────────── */
[data-theme="dark"] {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-2: #21253a;
  --glass: rgba(26,29,39,.92);
  --glass-b: rgba(255,255,255,.06);
  --border: #2e3347;
  --border-l: #252840;
  --t1: #e8eaf6;
  --t2: #8892b0;
  --t3: #4a5270;
  --p-bg: rgba(99,102,241,.15);
  --sky-bg: rgba(14,165,233,.12);
  --emerald-bg: rgba(16,185,129,.12);
  --amber-bg: rgba(245,158,11,.12);
  --rose-bg: rgba(244,63,94,.12);
  --violet-bg: rgba(139,92,246,.12);
  --sh-sm: 0 1px 4px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
  --sh-md: 0 4px 20px rgba(0,0,0,.4), 0 14px 44px rgba(0,0,0,.3);
}

[data-theme="dark"] body {
  background-image:
    radial-gradient(ellipse 900px 600px at 12% -8%,rgba(99,102,241,.08) 0%,transparent 62%),
    radial-gradient(ellipse 700px 500px at 92% 108%,rgba(124,58,237,.06) 0%,transparent 62%);
}

[data-theme="dark"] .card,
[data-theme="dark"] .table-card,
[data-theme="dark"] .stat-card { box-shadow: 0 2px 12px rgba(0,0,0,.4); }

[data-theme="dark"] .stat-card.stat-blue   { background: linear-gradient(135deg,#1e3a5f,#1a3050); }
[data-theme="dark"] .stat-card.stat-violet { background: linear-gradient(135deg,#2d1f5e,#261848); }
[data-theme="dark"] .stat-card.stat-amber  { background: linear-gradient(135deg,#3d2a00,#2e2000); }
[data-theme="dark"] .stat-card.stat-green  { background: linear-gradient(135deg,#0a3622,#082a1a); }

[data-theme="dark"] table { color: var(--t1); }
[data-theme="dark"] th { background: var(--surface-2) !important; color: var(--t2); border-color: var(--border) !important; }
[data-theme="dark"] td { border-color: var(--border) !important; }
[data-theme="dark"] tr:hover td { background: rgba(99,102,241,.06) !important; }

[data-theme="dark"] .form-input,
[data-theme="dark"] .ai-chat-input,
[data-theme="dark"] .sf-search-input {
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--t1);
}
[data-theme="dark"] .modal { background: var(--surface); border: 1px solid var(--border); }
[data-theme="dark"] .modal-header { border-color: var(--border); }

[data-theme="dark"] .ai-chat-panel { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .ai-msg-ai { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .ai-insights-card { background: rgba(99,102,241,.08); border-color: rgba(99,102,241,.25); }
[data-theme="dark"] .ai-tips-box { background: rgba(99,102,241,.08); border-color: rgba(99,102,241,.25); }

[data-theme="dark"] .btn-ghost {
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--t2);
}
[data-theme="dark"] .btn-ghost:hover { background: var(--border); color: var(--t1); }

[data-theme="dark"] .subject-card { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .deadline-item { border-color: var(--border); }
[data-theme="dark"] .deadline-item:hover { background: var(--surface-2); }
[data-theme="dark"] .sched-summary { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .legend-row { background: var(--surface); border-color: var(--border); }

[data-theme="dark"] .flash-success { background: rgba(16,185,129,.12); color: #6ee7b7; }
[data-theme="dark"] .flash-error   { background: rgba(244,63,94,.12);  color: #fda4af; }
[data-theme="dark"] .flash-info    { background: rgba(99,102,241,.12); color: #a5b4fc; }

[data-theme="dark"] .sf-toolbar { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .sf-filter-btn { background: var(--surface); border-color: var(--border); color: var(--t2); }
[data-theme="dark"] .sf-filter-btn.active { background: var(--p1); color: #fff; border-color: var(--p1); }
[data-theme="dark"] .sf-filter-btn:hover:not(.active) { background: var(--border); color: var(--t1); }

[data-theme="dark"] .countdown-urgent  { background: rgba(190,18,60,.2);  color: #fda4af; border-color: rgba(190,18,60,.3); }
[data-theme="dark"] .countdown-warning { background: rgba(180,83,9,.2);   color: #fcd34d; border-color: rgba(180,83,9,.3);  }
[data-theme="dark"] .countdown-ok      { background: rgba(6,95,70,.2);    color: #6ee7b7; border-color: rgba(6,95,70,.3);   }
[data-theme="dark"] .countdown-overdue { background: rgba(190,18,60,.35); color: #fda4af; border-color: rgba(190,18,60,.4); }

/* ── Step 3: Search & Filter Toolbar ──────────────────── */
.sf-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border-l);
  flex-wrap: wrap;
}
.sf-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.sf-search-icon {
  position: absolute;
  left: 10px;
  font-size: 14px;
  pointer-events: none;
}
.sf-search-input {
  padding: 8px 32px 8px 34px;
  border-radius: 9px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  font-size: 13px;
  color: var(--t1);
  width: 220px;
  outline: none;
  transition: border-color .15s, width .25s;
  font-family: inherit;
}
.sf-search-input:focus { border-color: var(--p1); width: 270px; }
.sf-clear-btn {
  position: absolute;
  right: 8px;
  background: none;
  border: none;
  color: var(--t3);
  font-size: 13px;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color .15s;
}
.sf-clear-btn:hover { color: var(--t1); }
.sf-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.sf-filter-btn {
  padding: 6px 13px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--t2);
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}
.sf-filter-btn:hover:not(.active) { background: var(--surface-2); color: var(--t1); }
.sf-filter-btn.active { background: var(--p1); color: #fff; border-color: var(--p1); box-shadow: 0 2px 8px rgba(99,102,241,.3); }
.sf-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--t3);
  font-weight: 600;
  white-space: nowrap;
}
.sf-no-results {
  text-align: center;
  padding: 40px 20px;
  color: var(--t3);
  font-size: 14px;
}

/* ═══════════════════════════════════════════════════════════
   PHASE 2 FEATURES
   Step 4+5: Notes & Links · Step 6: Pomodoro · Step 7: PDF Export
═══════════════════════════════════════════════════════════ */

/* ── Notes preview cell ───────────────────────────────── */
.notes-preview-cell {
  max-width: 180px;
}
.notes-snippet {
  font-size: 12px;
  color: var(--t2);
  display: block;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}
.links-badge {
  font-size: 13px;
  vertical-align: middle;
  margin-left: 3px;
}
.notes-empty { color: var(--t3); font-size: 13px; }

/* ── Notes open button ────────────────────────────────── */
.btn-notes-open {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 28px;
  border-radius: 7px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  font-size: 15px;
  cursor: pointer;
  transition: all .15s;
  vertical-align: middle;
}
.btn-notes-open:hover {
  background: var(--p-bg);
  border-color: var(--p1);
}

/* ── Link row inside notes modal ──────────────────────── */
.link-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.link-row input {
  flex: 1;
  padding: 8px 12px;
  border-radius: 9px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  font-size: 13px;
  color: var(--t1);
  outline: none;
  font-family: inherit;
  transition: border-color .15s;
}
.link-row input:focus { border-color: var(--p1); }
.link-row-del {
  background: none;
  border: none;
  color: var(--rose);
  font-size: 16px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  transition: background .15s;
  flex-shrink: 0;
}
.link-row-del:hover { background: var(--rose-bg); }

/* ── Rendered links in notes cell ─────────────────────── */
.link-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--p1);
  background: var(--p-bg);
  border: 1px solid rgba(99,102,241,.2);
  border-radius: 6px;
  padding: 2px 7px;
  text-decoration: none;
  margin: 2px 2px 0 0;
  transition: background .15s;
}
.link-chip:hover { background: rgba(99,102,241,.18); }

/* ── Pomodoro modal ───────────────────────────────────── */
.pomodoro-body {
  padding: 0 0 20px;
}
.pomo-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-l);
  padding: 0 20px;
}
.pomo-tab {
  flex: 1;
  padding: 12px 6px;
  font-size: 12px;
  font-weight: 700;
  background: none;
  border: none;
  border-bottom: 2.5px solid transparent;
  color: var(--t2);
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}
.pomo-tab.active { color: var(--p1); border-bottom-color: var(--p1); }
.pomo-tab:hover:not(.active) { color: var(--t1); }

.pomo-clock-wrap {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 24px auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pomo-ring {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  transform: rotate(-90deg);
}
.pomo-ring-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 8;
}
.pomo-ring-fill {
  fill: none;
  stroke: var(--p1);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset .5s linear, stroke .3s;
}
.pomo-time {
  font-size: 38px;
  font-weight: 800;
  color: var(--t1);
  letter-spacing: -.5px;
  line-height: 1;
  position: relative;
  z-index: 1;
  text-align: center;
}
.pomo-mode-label {
  position: absolute;
  bottom: 22px;
  font-size: 11px;
  font-weight: 700;
  color: var(--p1);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.pomo-controls {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin: 0 24px 16px;
}
.pomo-btn {
  flex: 1;
  padding: 11px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform .15s, opacity .15s;
  font-family: inherit;
}
.pomo-btn:hover { transform: scale(1.03); }
.pomo-btn-start {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  box-shadow: 0 4px 16px rgba(99,102,241,.35);
}
.pomo-btn-start.running {
  background: linear-gradient(135deg, #f43f5e, #ec4899);
  box-shadow: 0 4px 16px rgba(244,63,94,.35);
}
.pomo-btn-reset {
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  color: var(--t2);
}
.pomo-log {
  margin: 0 24px;
  max-height: 120px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.pomo-log-entry {
  font-size: 12px;
  color: var(--t2);
  padding: 6px 10px;
  background: var(--surface-2);
  border-radius: 8px;
  border-left: 3px solid var(--p1);
  animation: msgIn .2s ease;
}

/* ── Dark mode Pomodoro ───────────────────────────────── */
[data-theme="dark"] .pomo-btn-reset { background: var(--surface-2); }

/* ── PDF Export button ────────────────────────────────── */
@media print {
  .ai-fab, .ai-chat-panel, .sf-toolbar, .btn-group,
  .sidebar, nav, .page-header .btn-group,
  #ai-insights-mount, .flash-container { display: none !important; }
  body { background: #fff !important; }
  .main-content { margin: 0; padding: 16px; }
}

/* ═══════════════════════════════════════════════════════════
   PHASE 3 — ANALYTICS & GAMIFICATION
   Step 8: Streak · Step 9: Weekly Report · Step 10: Analytics
═══════════════════════════════════════════════════════════ */

/* ── Step 8: Streak Card (Dashboard) ──────────────────── */
.streak-card {
  background: linear-gradient(135deg, #f97316 0%, #ef4444 50%, #dc2626 100%);
  border-radius: var(--r);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  color: #fff;
  box-shadow: 0 8px 32px rgba(239,68,68,.35);
  position: relative;
  overflow: hidden;
}
.streak-card::before {
  content: '';
  position: absolute;
  top: -30px; right: -30px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
}
.streak-fire {
  font-size: 48px;
  line-height: 1;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,.3));
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.streak-info { flex: 1; position: relative; z-index: 1; }
.streak-number {
  font-size: 52px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -2px;
}
.streak-label {
  font-size: 14px;
  font-weight: 700;
  opacity: .9;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-top: 2px;
}
.streak-sub {
  font-size: 12px;
  opacity: .75;
  margin-top: 6px;
}
.streak-today-badge {
  background: rgba(255,255,255,.2);
  border-radius: 20px;
  padding: 2px 8px;
  font-weight: 700;
}
.streak-cta {
  background: rgba(255,255,255,.18);
  border: 1.5px solid rgba(255,255,255,.3);
  color: #fff;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
.streak-cta:hover { background: rgba(255,255,255,.28); }

/* ── Step 9: Weekly Report Card (Dashboard) ────────────── */
.weekly-card {
  background: var(--surface);
  border: 1px solid var(--border-l);
  border-radius: var(--r);
  padding: 20px 24px;
  box-shadow: var(--sh-sm);
}
.weekly-bars {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  height: 72px;
  margin-bottom: 14px;
}
.weekly-bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.weekly-bar-wrap {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.weekly-bar-fill {
  width: 100%;
  background: linear-gradient(180deg, #6366f1, #8b5cf6);
  border-radius: 4px 4px 0 0;
  transition: height .4s cubic-bezier(.22,1,.36,1);
  min-height: 0;
}
.weekly-bar-today .weekly-bar-fill,
.weekly-bar-fill.weekly-bar-today {
  background: linear-gradient(180deg, #f59e0b, #ef4444);
}
.weekly-bar-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--t3);
  text-transform: uppercase;
}
.weekly-stats-row {
  display: flex;
  gap: 0;
  border-top: 1px solid var(--border-l);
  padding-top: 14px;
}
.weekly-stat {
  flex: 1;
  text-align: center;
  border-right: 1px solid var(--border-l);
}
.weekly-stat:last-child { border-right: none; }
.weekly-stat-num {
  display: block;
  font-size: 22px;
  font-weight: 800;
  color: var(--t1);
  line-height: 1;
}
.weekly-stat-label {
  display: block;
  font-size: 11px;
  color: var(--t3);
  font-weight: 600;
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* ── Step 10: Analytics Page ───────────────────────────── */
.analytics-streak-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.an-streak-card {
  background: var(--surface);
  border: 1px solid var(--border-l);
  border-radius: var(--r);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--sh-sm);
  transition: transform .15s, box-shadow .15s;
}
.an-streak-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-md);
}
.an-streak-card.an-streak-best {
  background: linear-gradient(135deg, rgba(99,102,241,.08), rgba(139,92,246,.06));
  border-color: rgba(99,102,241,.2);
}
.an-streak-icon { font-size: 32px; line-height: 1; flex-shrink: 0; }
.an-streak-num {
  font-size: 32px;
  font-weight: 900;
  color: var(--t1);
  line-height: 1;
  letter-spacing: -1px;
}
.an-streak-lbl {
  font-size: 12px;
  font-weight: 600;
  color: var(--t2);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.charts-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.chart-card {
  background: var(--surface);
  border: 1px solid var(--border-l);
  border-radius: var(--r);
  padding: 20px 22px;
  box-shadow: var(--sh-sm);
}
.chart-wide {
  /* spans full width when it's the only card in a row */
}
.chart-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.chart-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--t1);
}
.chart-badge {
  font-size: 11px;
  font-weight: 600;
  background: var(--p-bg);
  color: var(--p1);
  border: 1px solid rgba(99,102,241,.2);
  border-radius: 20px;
  padding: 2px 10px;
}
.chart-wrap {
  position: relative;
}

/* Hard topics priority list */
.hard-topics-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 220px;
  overflow-y: auto;
}
.hard-topic-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--surface-2);
  border-radius: 9px;
  border: 1px solid var(--border-l);
}
.hard-topic-diff {
  font-size: 11px;
  color: #f59e0b;
  white-space: nowrap;
  flex-shrink: 0;
}
.hard-topic-name {
  flex: 1;
  font-size: 13px;
  font-weight: 600;
  color: var(--t1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hard-topic-deadline {
  flex-shrink: 0;
  font-size: 10.5px;
}

/* ── Dark mode analytics overrides ────────────────────── */
[data-theme="dark"] .an-streak-card { background: var(--surface); }
[data-theme="dark"] .chart-card { background: var(--surface); }
[data-theme="dark"] .hard-topic-row { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .weekly-card { background: var(--surface); }

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 900px) {
  .analytics-streak-row { grid-template-columns: repeat(2, 1fr); }
  .charts-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .analytics-streak-row { grid-template-columns: repeat(2, 1fr); }
  .streak-card { flex-wrap: wrap; }
  .streak-number { font-size: 40px; }
}

/* ═══════════════════════════════════════════════════════════
   PHASE 4 — AUTH PAGES
   Login · Register · Logout button in sidebar
═══════════════════════════════════════════════════════════ */

/* ── Auth page layout ─────────────────────────────────── */
.auth-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(ellipse 900px 600px at 10% 0%, rgba(99,102,241,.12) 0%, transparent 60%),
    radial-gradient(ellipse 700px 500px at 90% 100%, rgba(139,92,246,.10) 0%, transparent 60%),
    var(--bg);
}

.auth-wrap {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

/* ── Brand header above card ──────────────────────────── */
.auth-brand {
  text-align: center;
}
.auth-logo {
  width: 80px;
  height: 80px;
  margin: 0 auto;
  border-radius: 22px;
  overflow: hidden;
  filter: drop-shadow(0 6px 20px rgba(99,102,241,.5));
}
.auth-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.auth-brand-name {
  font-size: 26px;
  font-weight: 900;
  color: var(--t1);
  margin-top: 12px;
  letter-spacing: -.5px;
}
.auth-brand-sub {
  font-size: 13px;
  color: var(--t3);
  font-weight: 500;
  margin-top: 2px;
}

/* ── Auth card ────────────────────────────────────────── */
.auth-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border-l);
  border-radius: 20px;
  padding: 32px 32px 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,.12), 0 4px 20px rgba(99,102,241,.1);
}

.auth-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--t1);
  margin: 0 0 4px;
}
.auth-sub {
  font-size: 13px;
  color: var(--t3);
  margin: 0 0 24px;
}

/* ── Password field + toggle ──────────────────────────── */
.auth-pw-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.auth-pw-wrap .form-input {
  padding-right: 42px;
  width: 100%;
}
.auth-pw-toggle {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  color: var(--t3);
  transition: color .15s;
  flex-shrink: 0;
}
.auth-pw-toggle:hover { color: var(--t1); }

/* ── Password strength bar ────────────────────────────── */
.pw-strength-wrap {
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  margin-top: 8px;
  overflow: hidden;
}
.pw-strength-bar {
  height: 100%;
  width: 0%;
  border-radius: 99px;
  transition: width .3s, background .3s;
}

/* ── Remember me checkbox ─────────────────────────────── */
.auth-remember {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--t2);
  cursor: pointer;
  margin-bottom: 18px;
  user-select: none;
}
.auth-remember input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--p1);
  flex-shrink: 0;
}

/* ── Submit button ────────────────────────────────────── */
.auth-submit {
  width: 100%;
  padding: 13px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 12px;
  margin-top: 4px;
}

/* ── Switch link (login ↔ register) ───────────────────── */
.auth-switch {
  text-align: center;
  font-size: 13px;
  color: var(--t2);
  margin-top: 20px;
  margin-bottom: 0;
}
.auth-switch a { color: var(--p1); font-weight: 700; text-decoration: none; }
.auth-switch a:hover { text-decoration: underline; }

/* ── form-hint ────────────────────────────────────────── */
.form-hint {
  font-size: 11.5px;
  color: var(--t3);
  margin-top: 5px;
  font-weight: 500;
}

/* ── Sidebar logout button ────────────────────────────── */
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logout-btn {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(244,63,94,.12);
  color: #f43f5e;
  border: 1.5px solid rgba(244,63,94,.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  text-decoration: none;
  transition: background .15s, transform .15s;
  flex-shrink: 0;
}
.logout-btn:hover {
  background: rgba(244,63,94,.22);
  transform: scale(1.08);
}

/* ── Dark mode auth overrides ─────────────────────────── */
[data-theme="dark"] .auth-card {
  background: var(--surface);
  border-color: var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,.4), 0 4px 20px rgba(99,102,241,.15);
}
[data-theme="dark"] .auth-body {
  background:
    radial-gradient(ellipse 900px 600px at 10% 0%, rgba(99,102,241,.08) 0%, transparent 60%),
    radial-gradient(ellipse 700px 500px at 90% 100%, rgba(139,92,246,.06) 0%, transparent 60%),
    var(--bg);
}

/* ═══════════════════════════════════════════════════════════
   STEP 12 — SETTINGS / PREFERENCES PAGE
═══════════════════════════════════════════════════════════ */

/* ── Page layout ──────────────────────────────────────── */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}
.settings-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ── Settings card ────────────────────────────────────── */
.settings-card {
  background: var(--surface);
  border: 1px solid var(--border-l);
  border-radius: var(--r);
  padding: 24px;
  box-shadow: var(--sh-sm);
}
.settings-card-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-l);
}
.settings-card-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.settings-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--t1);
  margin: 0 0 3px;
}
.settings-card-sub {
  font-size: 12px;
  color: var(--t3);
  margin: 0;
}
.settings-danger {
  border-color: rgba(244, 63, 94, .2);
  background: linear-gradient(135deg,
    rgba(244,63,94,.03) 0%, var(--surface) 60%);
}

/* ── Hours slider ─────────────────────────────────────── */
.hours-slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hours-slider-wrap input[type="range"] {
  width: 100%;
  accent-color: var(--p1);
  height: 6px;
  cursor: pointer;
}
.hours-slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--t3);
  font-weight: 600;
}
.hours-display {
  margin-top: 10px;
  font-size: 28px;
  font-weight: 900;
  color: var(--p1);
  letter-spacing: -1px;
}

/* ── Difficulty star picker ───────────────────────────── */
.diff-picker {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.diff-option {
  cursor: pointer;
  display: block;
}
.diff-option input[type="radio"] { display: none; }
.diff-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  font-size: 14px;
  color: var(--t2);
  transition: all .15s;
  cursor: pointer;
  letter-spacing: 1px;
}
.diff-option input[type="radio"]:checked + .diff-pill {
  border-color: var(--p1);
  background: var(--p-bg);
  color: var(--t1);
  box-shadow: 0 0 0 3px rgba(99,102,241,.1);
}
.diff-pill:hover { border-color: rgba(99,102,241,.4); background: var(--p-bg); }
.diff-label-text {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--t2);
  margin-left: 4px;
}
.diff-option input:checked + .diff-pill .diff-label-text { color: var(--p1); }

/* ── Segmented control (deadline days) ────────────────── */
.segmented-control {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.seg-option { cursor: pointer; }
.seg-option input[type="radio"] { display: none; }
.seg-pill {
  display: block;
  padding: 8px 16px;
  border-radius: 9px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  font-size: 13px;
  font-weight: 700;
  color: var(--t2);
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.seg-option input:checked + .seg-pill {
  border-color: var(--p1);
  background: var(--p1);
  color: #fff;
  box-shadow: 0 3px 10px rgba(99,102,241,.3);
}
.seg-pill:hover { border-color: var(--p1); color: var(--p1); }

/* ── Toggle switch row ────────────────────────────────── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border-l);
  border-radius: 12px;
}
.toggle-row-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--t1);
}
.toggle-row-sub {
  font-size: 12px;
  color: var(--t3);
  margin-top: 2px;
}
/* Custom toggle switch */
.sf-toggle { cursor: pointer; flex-shrink: 0; }
.sf-toggle input[type="checkbox"] { display: none; }
.sf-toggle-track {
  display: block;
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 99px;
  position: relative;
  transition: background .25s;
}
.sf-toggle input:checked + .sf-toggle-track { background: var(--p1); }
.sf-toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  transition: transform .25s cubic-bezier(.22,1,.36,1);
  box-shadow: 0 1px 4px rgba(0,0,0,.25);
}
.sf-toggle input:checked + .sf-toggle-track .sf-toggle-thumb {
  transform: translateX(20px);
}

/* ── Theme picker swatches ────────────────────────────── */
.theme-picker {
  display: flex;
  gap: 12px;
}
.theme-option {
  flex: 1;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.theme-option input[type="radio"] { display: none; }
.theme-swatch {
  width: 100%;
  height: 72px;
  border-radius: 12px;
  border: 2.5px solid var(--border);
  overflow: hidden;
  transition: border-color .15s, box-shadow .15s;
  display: flex;
  flex-direction: column;
}
.theme-option.active .theme-swatch,
.theme-option:hover .theme-swatch {
  border-color: var(--p1);
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.theme-swatch-header {
  height: 20px;
  flex-shrink: 0;
}
.theme-swatch-body {
  flex: 1;
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.theme-swatch-bar {
  height: 7px;
  border-radius: 4px;
}
.theme-swatch-bar.short { width: 60%; }

/* Light swatch colours */
.theme-light .theme-swatch-header { background: #6366f1; }
.theme-light .theme-swatch-body   { background: #f8f8ff; }
.theme-light .theme-swatch-bar    { background: #e2e8f0; }

/* Dark swatch colours */
.theme-dark .theme-swatch-header { background: #4338ca; }
.theme-dark .theme-swatch-body   { background: #1a1d27; }
.theme-dark .theme-swatch-bar    { background: #2e3347; }

/* System swatch — diagonal split */
.theme-system .theme-swatch-header {
  background: linear-gradient(90deg, #6366f1 50%, #4338ca 50%);
}
.theme-system .theme-swatch-body {
  background: linear-gradient(135deg, #f8f8ff 50%, #1a1d27 50%);
}
.theme-system .theme-swatch-bar {
  background: linear-gradient(90deg, #e2e8f0 50%, #2e3347 50%);
}

.theme-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--t2);
}
.theme-option.active .theme-label { color: var(--p1); }

/* ── Account stats strip ──────────────────────────────── */
.account-stats {
  display: flex;
  gap: 0;
  background: var(--surface-2);
  border: 1px solid var(--border-l);
  border-radius: 12px;
  overflow: hidden;
}
.account-stat {
  flex: 1;
  padding: 14px 16px;
  text-align: center;
  border-right: 1px solid var(--border-l);
}
.account-stat:last-child { border-right: none; }
.account-stat-icon { font-size: 18px; display: block; margin-bottom: 4px; }
.account-stat-val {
  font-size: 14px;
  font-weight: 700;
  color: var(--t1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.account-stat-lbl {
  font-size: 11px;
  color: var(--t3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-top: 2px;
}

/* ── Danger zone ──────────────────────────────────────── */
.danger-actions { display: flex; flex-direction: column; gap: 12px; }
.danger-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid rgba(244,63,94,.15);
  border-radius: 10px;
}
.danger-row-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--t1);
}
.danger-row-sub { font-size: 12px; color: var(--t3); margin-top: 2px; }
.btn-danger-outline {
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 9px;
  border: 1.5px solid rgba(244,63,94,.4);
  background: transparent;
  color: #f43f5e;
  cursor: pointer;
  white-space: nowrap;
  transition: all .15s;
  font-family: inherit;
}
.btn-danger-outline:hover {
  background: rgba(244,63,94,.1);
  border-color: #f43f5e;
}

/* ── Dark mode overrides ──────────────────────────────── */
[data-theme="dark"] .settings-card { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .settings-danger {
  background: linear-gradient(135deg, rgba(244,63,94,.05) 0%, var(--surface) 60%);
  border-color: rgba(244,63,94,.25);
}
[data-theme="dark"] .toggle-row { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .account-stats { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .account-stat { border-color: var(--border); }
[data-theme="dark"] .diff-pill { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .seg-pill { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .danger-row { background: var(--surface-2); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 860px) {
  .settings-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════
   PHASE 5 — SMARTER SCHEDULING
   Step 13: Adaptive Rescheduling · Step 14: Spaced Repetition
   Step 15: Drag and Drop
═══════════════════════════════════════════════════════════ */

/* ── Step 15: Drag-and-drop handle ───────────────────── */
.drag-handle-cell {
  width: 28px;
  padding: 0 4px !important;
  text-align: center;
}
.drag-handle {
  display: inline-block;
  font-size: 16px;
  color: var(--t3);
  cursor: grab;
  padding: 4px;
  border-radius: 5px;
  transition: color .15s, background .15s;
  user-select: none;
  letter-spacing: -1px;
}
.drag-handle:hover { color: var(--p1); background: var(--p-bg); }
.drag-handle:active { cursor: grabbing; }

.sched-drag-ghost  { opacity: .4; background: var(--p-bg) !important; }
.sched-drag-chosen { background: var(--p-bg) !important; box-shadow: var(--sh-md); }

/* Drop toast notification */
.drag-toast {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--t1);
  box-shadow: var(--sh-md);
  opacity: 0;
  transition: opacity .25s, transform .25s;
  z-index: 9999;
  pointer-events: none;
  white-space: nowrap;
}
.drag-toast-show { opacity: 1; transform: translateX(-50%) translateY(0); }
.drag-toast-err  { border-color: rgba(244,63,94,.3); color: #f43f5e; }

/* ── Step 14: Spaced Repetition Reviews page ──────────── */
.sr-explainer {
  background: linear-gradient(135deg,
    rgba(99,102,241,.07) 0%, rgba(139,92,246,.05) 100%);
  border: 1.5px solid rgba(99,102,241,.18);
  border-radius: var(--r);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.sr-explainer-icon { font-size: 32px; flex-shrink: 0; }
.sr-explainer-text {
  flex: 1;
  font-size: 13px;
  color: var(--t2);
  line-height: 1.6;
}
.sr-explainer-text strong { color: var(--t1); }
.sr-explainer-stats {
  display: flex;
  gap: 20px;
  flex-shrink: 0;
}
.sr-stat { text-align: center; }
.sr-stat-num {
  display: block;
  font-size: 28px;
  font-weight: 900;
  color: var(--p1);
  line-height: 1;
}
.sr-stat-lbl {
  font-size: 11px;
  color: var(--t3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-top: 2px;
}

.section-title {
  font-size: 15px;
  font-weight: 800;
  color: var(--t1);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
}

/* Review cards grid */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.review-card {
  background: var(--surface);
  border: 1px solid var(--border-l);
  border-radius: var(--r);
  padding: 20px;
  box-shadow: var(--sh-sm);
  transition: transform .15s, box-shadow .15s;
}
.review-card:hover { transform: translateY(-2px); box-shadow: var(--sh-md); }

.review-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}
.review-topic-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--t1);
}
.review-subject-name {
  font-size: 12px;
  font-weight: 600;
  margin-top: 2px;
}
.review-meta { text-align: right; }
.review-interval {
  font-size: 12px;
  color: var(--t2);
}
.review-ease {
  font-size: 11px;
  color: var(--t3);
  margin-top: 2px;
}

.review-diff-bar {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-bottom: 14px;
}
.review-star     { color: var(--border); font-size: 14px; }
.review-star-on  { color: #f59e0b; }
.review-n-badge {
  margin-left: 8px;
  font-size: 11px;
  font-weight: 700;
  background: var(--p-bg);
  color: var(--p1);
  border-radius: 20px;
  padding: 2px 8px;
}

.review-prompt {
  font-size: 13px;
  color: var(--t2);
  margin-bottom: 12px;
  font-weight: 500;
}

/* Quality rating buttons */
.review-quality-btns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.rq-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 4px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}
.rq-btn:hover { transform: scale(1.04); border-color: var(--p1); }
.rq-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.rq-icon  { font-size: 20px; line-height: 1; }
.rq-label { font-size: 10px; font-weight: 700; color: var(--t2); }

/* quality-specific accent colours on hover */
.rq-0:hover { border-color: #7c3aed; background: rgba(124,58,237,.08); }
.rq-1:hover { border-color: #f43f5e; background: rgba(244,63,94,.08); }
.rq-2:hover { border-color: #f59e0b; background: rgba(245,158,11,.08); }
.rq-3:hover { border-color: #06b6d4; background: rgba(6,182,212,.08); }
.rq-4:hover { border-color: #10b981; background: rgba(16,185,129,.08); }
.rq-5:hover { border-color: #6366f1; background: rgba(99,102,241,.08); }
.rq-selected { border-color: var(--p1) !important; background: var(--p-bg) !important; }

/* Review done confirmation */
.review-done-msg {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 0;
}
.review-done-icon { font-size: 32px; }

/* E-factor bar */
.ease-bar-wrap {
  width: 60px;
  height: 5px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 3px;
}
.ease-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #f43f5e, #f59e0b, #10b981);
  border-radius: 99px;
  transition: width .4s;
}

/* Subject dot */
.subject-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 5px;
  vertical-align: middle;
}

/* ── Dark mode overrides ──────────────────────────────── */
[data-theme="dark"] .review-card { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .rq-btn { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .drag-toast { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .sr-explainer {
  background: linear-gradient(135deg,rgba(99,102,241,.1) 0%,rgba(139,92,246,.07) 100%);
  border-color: rgba(99,102,241,.25);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 640px) {
  .reviews-grid { grid-template-columns: 1fr; }
  .sr-explainer { flex-direction: column; }
  .sr-explainer-stats { width: 100%; justify-content: center; }
}

/* ═══════════════════════════════════════════════════════════
   PHASE 6 — AI UPGRADES
   Step 16: Difficulty Badge · Step 17: Readiness Score
   Step 18: Quiz Modal · Step 20: Voice Input
═══════════════════════════════════════════════════════════ */

/* ── Step 16: AI Difficulty Badge ─────────────────────── */
.ai-diff-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 600;
  background: linear-gradient(135deg,rgba(99,102,241,.1),rgba(139,92,246,.08));
  color: var(--p1);
  border: 1px solid rgba(99,102,241,.2);
  border-radius: 20px;
  padding: 3px 10px;
  margin-left: 8px;
  vertical-align: middle;
  white-space: nowrap;
  animation: msgIn .2s ease;
}
.ai-diff-accept {
  background: var(--p1);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: opacity .15s;
}
.ai-diff-accept:hover { opacity: .85; }
.ai-diff-reason {
  font-size: 12px;
  color: var(--p1);
  margin-top: 6px;
  padding: 6px 10px;
  background: var(--p-bg);
  border-radius: 8px;
  border-left: 3px solid var(--p1);
}

/* ── Step 17: AI Exam Readiness Badge ─────────────────── */
.readiness-badge-wrap {
  margin-top: 12px;
  min-height: 36px;
}
.readiness-loading {
  font-size: 11px;
  color: var(--t3);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
}
.readiness-dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--p1);
  animation: aiPulse 1.5s infinite;
}
.readiness-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(var(--r-color, 99,102,241), .2);
  border-radius: 10px;
  padding: 8px 12px;
  animation: msgIn .3s ease;
}
.readiness-ring-wrap {
  position: relative;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}
.readiness-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.rr-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 4;
}
.rr-fill {
  fill: none;
  stroke-width: 4;
  stroke-linecap: round;
  transition: stroke-dasharray .6s cubic-bezier(.22,1,.36,1);
}
.readiness-score {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  font-size: 11px;
  font-weight: 900;
  color: var(--t1);
}
.readiness-info { flex: 1; min-width: 0; }
.readiness-label {
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}
.readiness-tip {
  font-size: 11px;
  color: var(--t3);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Step 18: Quiz Modal ──────────────────────────────── */
.quiz-modal { max-width: 640px; }

.quiz-question {
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-l);
}
.quiz-question:last-child { border-bottom: none; margin-bottom: 0; }

.quiz-q-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--t1);
  line-height: 1.5;
  margin-bottom: 12px;
  display: flex;
  gap: 8px;
}
.quiz-q-num {
  background: var(--p1);
  color: #fff;
  border-radius: 6px;
  padding: 1px 7px;
  font-size: 11px;
  font-weight: 800;
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 2px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.quiz-option-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  cursor: pointer;
  font-size: 13px;
  transition: all .15s;
  user-select: none;
}
.quiz-option-label:hover { border-color: var(--p1); background: var(--p-bg); }
.quiz-option-label input[type="radio"] { display: none; }
.quiz-option-label:has(input:checked) {
  border-color: var(--p1);
  background: var(--p-bg);
}
.quiz-option-key {
  width: 22px; height: 22px;
  border-radius: 6px;
  background: var(--border);
  color: var(--t2);
  font-size: 11px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all .15s;
}
.quiz-option-label:has(input:checked) .quiz-option-key {
  background: var(--p1);
  color: #fff;
}
.quiz-option-text { flex: 1; color: var(--t1); }

/* Result states */
.quiz-correct {
  border-color: #10b981 !important;
  background: rgba(16,185,129,.08) !important;
}
.quiz-correct .quiz-option-key { background: #10b981 !important; color: #fff !important; }
.quiz-wrong {
  border-color: #f43f5e !important;
  background: rgba(244,63,94,.08) !important;
}
.quiz-wrong .quiz-option-key { background: #f43f5e !important; color: #fff !important; }

.quiz-result {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  animation: msgIn .25s ease;
}
.quiz-result-emoji { font-size: 24px; }
.quiz-result-good { background: rgba(16,185,129,.12); color: #059669; border: 1px solid rgba(16,185,129,.25); }
.quiz-result-ok   { background: rgba(245,158,11,.10); color: #b45309; border: 1px solid rgba(245,158,11,.25); }
.quiz-result-bad  { background: rgba(244,63,94,.10);  color: #be123c; border: 1px solid rgba(244,63,94,.25); }

/* ── Step 20: Voice Input mic button ──────────────────── */
.ai-chat-mic {
  padding: 9px 11px;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  cursor: pointer;
  transition: all .15s;
  flex-shrink: 0;
}
.ai-chat-mic:hover:not(:disabled) { border-color: var(--p1); background: var(--p-bg); }
.ai-chat-mic:disabled { opacity: .35; cursor: not-allowed; }
.ai-chat-mic.mic-active {
  border-color: #f43f5e;
  background: rgba(244,63,94,.1);
  animation: micPulse 1s infinite;
}
@keyframes micPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(244,63,94,.4); }
  50%      { box-shadow: 0 0 0 6px rgba(244,63,94,0); }
}

/* ── Dark mode overrides ──────────────────────────────── */
[data-theme="dark"] .quiz-option-label { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .readiness-badge { background: rgba(255,255,255,.04); }
[data-theme="dark"] .ai-chat-mic { background: var(--surface-2); border-color: var(--border); }

/* ═══════════════════════════════════════════════════════════
   PHASE 7 — AI UPGRADES
   Feature 1: AI Auto-Fill · Feature 2: Quiz Fix · Feature 3: Practice
═══════════════════════════════════════════════════════════ */

/* ── Feature 1: AI Auto-Fill Button ───────────────────── */
.btn-ai-autofill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 9px;
  border: 1.5px solid rgba(99,102,241,.3);
  background: linear-gradient(135deg,rgba(99,102,241,.1),rgba(139,92,246,.08));
  color: var(--p1);
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
  white-space: nowrap;
}
.btn-ai-autofill:hover:not(:disabled) {
  background: linear-gradient(135deg,rgba(99,102,241,.18),rgba(139,92,246,.14));
  border-color: var(--p1);
  transform: scale(1.02);
}
.btn-ai-autofill:disabled { opacity: .6; cursor: not-allowed; }

/* Flash highlight when field is auto-filled */
@keyframes autofillFlash {
  0%   { background: rgba(99,102,241,.25); border-color: var(--p1); }
  100% { background: inherit; border-color: inherit; }
}
.autofill-flash { animation: autofillFlash .8s ease-out; }

/* Reason strip below form row */
.autofill-reason-strip {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 14px;
  background: linear-gradient(135deg,rgba(99,102,241,.07),rgba(139,92,246,.04));
  border: 1px solid rgba(99,102,241,.18);
  border-radius: 10px;
  margin: 0 0 16px;
  animation: msgIn .25s ease;
}
.autofill-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.autofill-text { font-size: 13px; color: var(--t1); font-weight: 500; flex: 1; }
.autofill-override {
  font-size: 11px;
  color: var(--t3);
  white-space: nowrap;
  align-self: center;
}

/* ── Feature 2: Quiz Modal Scroll Fix ─────────────────── */
.quiz-modal {
  max-width: 660px;
  display: flex;
  flex-direction: column;
  max-height: 88vh;   /* prevent modal exceeding viewport */
}
.quiz-scroll-body {
  flex: 1;
  overflow-y: auto;
  min-height: 0;      /* critical for flex scroll to work */
}
.quiz-scroll-inner { padding: 20px 24px; }
.quiz-modal-footer {
  border-top: 1px solid var(--border-l);
  background: var(--surface);
  flex-shrink: 0;     /* footer never scrolls away */
  z-index: 1;
}
.quiz-revision-note {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 600;
  opacity: .85;
}

/* ── Feature 3: Practice Session Page ─────────────────── */
.practice-form {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
}
.practice-form .form-group { margin-bottom: 0; min-width: 160px; }
.practice-form .form-grow  { flex: 1; min-width: 220px; }

/* Difficulty tabs */
.practice-diff-tabs { display: flex; gap: 6px; }
.pdiff-btn {
  flex: 1;
  padding: 8px 10px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 9px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--t2);
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
  white-space: nowrap;
}
.pdiff-btn.active {
  border-color: var(--p1);
  background: var(--p-bg);
  color: var(--p1);
}
.pdiff-btn:hover:not(.active) { border-color: rgba(99,102,241,.3); }

.practice-generate-btn {
  padding: 11px 24px;
  font-size: 14px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Loading animation */
.practice-loading {
  justify-content: center;
  align-items: center;
  padding: 60px 20px;
  flex-direction: column;
  gap: 20px;
}
.practice-loading-inner { text-align: center; }
.practice-loading-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 20px;
}
.practice-loading-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--p1);
  animation: aiThink 1.1s infinite;
}
.practice-loading-dots span:nth-child(1) { animation-delay: 0s;    background: #6366f1; }
.practice-loading-dots span:nth-child(2) { animation-delay: .15s;  background: #8b5cf6; }
.practice-loading-dots span:nth-child(3) { animation-delay: .30s;  background: #06b6d4; }
.practice-loading-dots span:nth-child(4) { animation-delay: .45s;  background: #10b981; }
.practice-loading-dots span:nth-child(5) { animation-delay: .60s;  background: #f59e0b; }
.practice-loading-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--t1);
  margin-bottom: 6px;
  transition: opacity .3s;
}
.practice-loading-sub { font-size: 13px; color: var(--t3); }

/* Paper header */
.paper-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.paper-meta { flex: 1; }
.paper-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--t1);
  margin: 0 0 8px;
}
.paper-pills { display: flex; gap: 6px; flex-wrap: wrap; }
.paper-pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  background: var(--p-bg);
  color: var(--p1);
  border: 1px solid rgba(99,102,241,.2);
}
.paper-pill-count { background: var(--emerald-bg); color: #059669;
                    border-color: rgba(16,185,129,.2); }
.paper-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.answers-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

/* Paper body */
.paper-body { padding: 0; overflow: hidden; }
.paper-section {
  padding: 14px 24px 10px;
  background: linear-gradient(135deg,rgba(99,102,241,.06),rgba(139,92,246,.04));
  border-bottom: 1px solid var(--border-l);
}
.paper-section-title {
  font-size: 14px;
  font-weight: 800;
  color: var(--p1);
  display: flex;
  align-items: center;
  gap: 10px;
}
.paper-section-count {
  font-size: 11px;
  font-weight: 600;
  background: var(--p1);
  color: #fff;
  border-radius: 20px;
  padding: 2px 9px;
}
.paper-section-inst {
  font-size: 12px;
  color: var(--t3);
  margin-top: 3px;
}

/* Individual question */
.paper-question {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-l);
  transition: background .15s;
}
.paper-question:last-child { border-bottom: none; }
.paper-question:hover { background: rgba(99,102,241,.02); }

.pq-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.pq-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 22px;
  padding: 0 6px;
  background: var(--p1);
  color: #fff;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 800;
  flex-shrink: 0;
}
.pq-type-badge {
  font-size: 10px;
  font-weight: 800;
  border-radius: 20px;
  padding: 2px 8px;
  letter-spacing: .04em;
}
.pq-mcq { background: var(--p-bg);       color: var(--p1);  border: 1px solid rgba(99,102,241,.2); }
.pq-tf  { background: var(--amber-bg);   color: #b45309;    border: 1px solid rgba(245,158,11,.2); }
.pq-sa  { background: var(--emerald-bg); color: #059669;    border: 1px solid rgba(16,185,129,.2); }

.pq-text {
  font-size: 14px;
  color: var(--t1);
  line-height: 1.6;
  font-weight: 500;
  margin-bottom: 12px;
}
.pq-options {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-left: 4px;
}
.pq-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--t2);
  padding: 2px 0;
}
.pq-opt-key {
  font-weight: 800;
  color: var(--p1);
  min-width: 18px;
  flex-shrink: 0;
}
.pq-opt-val { flex: 1; }

.pq-tf-boxes {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: var(--t2);
  font-weight: 600;
  margin-left: 4px;
}
.pq-answer-box {
  height: 52px;
  border-bottom: 1.5px solid var(--border);
  margin: 4px 0 4px 4px;
}

.pq-answer {
  margin-top: 10px;
  padding: 9px 12px;
  background: rgba(16,185,129,.08);
  border: 1px solid rgba(16,185,129,.2);
  border-radius: 9px;
  font-size: 13px;
  color: #059669;
  font-weight: 500;
  animation: msgIn .2s ease;
}

/* ── Dark mode overrides ──────────────────────────────── */
[data-theme="dark"] .pdiff-btn { background: var(--surface-2); border-color: var(--border); }
[data-theme="dark"] .paper-section { background: rgba(99,102,241,.08); }
[data-theme="dark"] .paper-question:hover { background: rgba(99,102,241,.04); }
[data-theme="dark"] .pq-answer { background: rgba(16,185,129,.1); border-color: rgba(16,185,129,.25); }
[data-theme="dark"] .pq-answer-box { border-color: var(--border); }
[data-theme="dark"] .autofill-reason-strip {
  background: rgba(99,102,241,.1);
  border-color: rgba(99,102,241,.25);
}
[data-theme="dark"] .quiz-modal-footer { background: var(--surface); border-color: var(--border); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 700px) {
  .practice-form { flex-direction: column; }
  .practice-generate-btn { width: 100%; justify-content: center; }
  .paper-header { flex-direction: column; }
  .paper-controls { width: 100%; }
}

/* ── Practice page error banner ───────────────────────── */
.practice-error-banner {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(244,63,94,.08);
  border: 1.5px solid rgba(244,63,94,.25);
  border-radius: var(--r);
  color: #be123c;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  animation: msgIn .25s ease;
}
[data-theme="dark"] .practice-error-banner {
  background: rgba(244,63,94,.12);
  border-color: rgba(244,63,94,.35);
  color: #fda4af;
}

/* ═══════════════════════════════════════════════════════════
   PROFESSIONAL UI POLISH — targeted refinements only
═══════════════════════════════════════════════════════════ */

/* 1. Heading & card-title weight lift */
.page-title {
  font-weight: 900;
  letter-spacing: -.7px;
}
.card-title {
  font-size: 15.5px;
  font-weight: 800;
  letter-spacing: -.15px;
}
.card-header {
  margin-bottom: 24px;
}

/* 2. Letter-spacing on labels, badges, uppercase text */
.stat-label {
  letter-spacing: .10em;
  font-weight: 700;
}
.badge, [class*="-badge"], .today-badge, .diff-badge {
  letter-spacing: .04em;
}
.nav-section-label {
  letter-spacing: .18em;
}
th, .topics-table th, .schedule-table th {
  letter-spacing: .10em;
  font-weight: 800;
}

/* 3. Card borders slightly more defined */
.card {
  border-color: var(--glass-b);
  border-width: 1.5px;
  padding: 30px;
}
.table-card {
  border-width: 1.5px;
}

/* 4. Table row padding — more breathing room */
.topics-table th, .schedule-table th {
  padding: 14px 18px;
}
.topics-table td, .schedule-table td {
  padding: 16px 18px;
}

/* 5. Table header rows slightly darker */
.topics-table thead tr,
.schedule-table thead tr {
  background: linear-gradient(90deg, rgba(99,102,241,.11), rgba(124,58,237,.07));
  border-bottom: 2px solid rgba(99,102,241,.18);
}

/* 6. Buttons — consistent height (40px) and border-radius */
.btn {
  height: 40px;
  padding: 0 22px;
  border-radius: 10px;
  font-weight: 700;
  letter-spacing: .01em;
}
.btn-sm {
  height: 32px;
  padding: 0 14px;
  font-size: 12px;
  border-radius: 8px;
}

/* 7. Sidebar shadow to separate from content */
.sidebar {
  box-shadow: 4px 0 32px rgba(0,0,0,.32), 1px 0 0 rgba(255,255,255,.04);
}

/* 8. Sidebar nav — perfect vertical alignment */
.nav-item {
  align-items: center;
  padding: 10px 14px;
  gap: 12px;
  font-weight: 600;
  font-size: 13.5px;
}
.nav-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  line-height: 1;
}

/* 9. Page title/subtitle tighter spacing */
.page-sub {
  margin-top: 2px;
  font-size: 13.5px;
  font-weight: 450;
  letter-spacing: .01em;
}

/* 10. Inputs & selects — consistent height and border */
.form-input,
select.form-input,
.form-input[type="text"],
.form-input[type="email"],
.form-input[type="password"],
.form-input[type="number"],
.form-input[type="date"] {
  height: 42px;
  padding: 0 14px;
  border-width: 1.5px;
  border-radius: 10px;
  font-size: 14px;
}
textarea.form-input {
  height: auto;
  padding: 12px 14px;
}