/* ===========================================================
   AVEN AI · QUIZ  —  Design System
   GenZ Glassmorphism · Aurora gradient mesh · Light/Dark aware
=========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=Manrope:wght@400;500;600;700;800&display=swap');

:root{
  --font-display:'Sora',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --font-body:'Manrope',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;

  /* Aurora palette */
  --violet:#7c3aed;
  --fuchsia:#ec4899;
  --cyan:#06b6d4;
  --lime:#a3e635;
  --amber:#f59e0b;
  --blue:#3b82f6;

  --grad-brand:linear-gradient(135deg,var(--violet) 0%,var(--fuchsia) 55%,var(--amber) 100%);
  --grad-brand-soft:linear-gradient(135deg,rgba(124,58,237,.15),rgba(236,72,153,.15));
  --grad-cta:linear-gradient(135deg,#7c3aed,#ec4899);

  /* Light theme (default) */
  --bg:#f3f2fb;
  --bg-blob-1:#c4b5fd;
  --bg-blob-2:#fbcfe8;
  --bg-blob-3:#a5f3fc;
  --surface:rgba(255,255,255,.62);
  --surface-solid:#ffffff;
  --surface-strong:rgba(255,255,255,.85);
  --border:rgba(255,255,255,.5);
  --border-soft:rgba(15,23,42,.08);
  --text:#161222;
  --text-dim:#5b5470;
  --text-faint:#8b85a0;
  --shadow:0 10px 40px -12px rgba(76,29,149,.25);
  --shadow-sm:0 4px 16px -4px rgba(76,29,149,.18);
  --danger:#e11d48;
  --success:#16a34a;
  --warn:#d97706;
  --radius-lg:26px;
  --radius-md:18px;
  --radius-sm:12px;
}

html[data-theme="dark"]{
  --bg:#0b0a14;
  --bg-blob-1:#4c1d95;
  --bg-blob-2:#831843;
  --bg-blob-3:#164e63;
  --surface:rgba(24,20,38,.6);
  --surface-solid:#161225;
  --surface-strong:rgba(28,23,45,.85);
  --border:rgba(255,255,255,.09);
  --border-soft:rgba(255,255,255,.08);
  --text:#f3f1fb;
  --text-dim:#b6afd1;
  --text-faint:#847d9e;
  --shadow:0 10px 40px -12px rgba(0,0,0,.55);
  --shadow-sm:0 4px 16px -4px rgba(0,0,0,.45);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  transition:background .3s ease,color .3s ease;
  position:relative;
  overflow-x:hidden;
  padding-bottom:env(safe-area-inset-bottom);
}
h1,h2,h3,h4,.font-display{font-family:var(--font-display);letter-spacing:-0.02em}
p{line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit}
::selection{background:var(--violet);color:#fff}

/* ---------- Aurora background blobs (fixed, behind everything) ---------- */
.aurora-bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:var(--bg)}
.aurora-bg .blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;animation:float 18s ease-in-out infinite}
.aurora-bg .b1{width:480px;height:480px;background:var(--bg-blob-1);top:-120px;left:-100px;animation-delay:0s}
.aurora-bg .b2{width:420px;height:420px;background:var(--bg-blob-2);top:20%;right:-140px;animation-delay:-6s}
.aurora-bg .b3{width:420px;height:420px;background:var(--bg-blob-3);bottom:-160px;left:20%;animation-delay:-11s}
.aurora-bg .grain{position:absolute;inset:0;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E")}
@keyframes float{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(30px,-40px) scale(1.08)}
}
@media (prefers-reduced-motion:reduce){.aurora-bg .blob{animation:none}}

/* ---------- Glass surfaces ---------- */
.glass{
  background:var(--surface);
  backdrop-filter:blur(22px) saturate(160%);
  -webkit-backdrop-filter:blur(22px) saturate(160%);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
}
.glass-strong{
  background:var(--surface-strong);
  backdrop-filter:blur(26px) saturate(160%);
  -webkit-backdrop-filter:blur(26px) saturate(160%);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
}
.card{padding:24px;border-radius:var(--radius-md)}

/* ---------- Layout helpers ---------- */
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.container-sm{max-width:720px;margin:0 auto;padding:0 20px}
.flex{display:flex}
.flex-col{display:flex;flex-direction:column}
.items-center{align-items:center}
.justify-between{justify-content:space-between}
.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-24{gap:24px}
.hidden{display:none !important}
.text-center{text-align:center}
.muted{color:var(--text-dim)}
.faint{color:var(--text-faint)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;border-radius:14px;border:none;cursor:pointer;
  font-family:var(--font-display);font-weight:700;font-size:15px;
  transition:transform .15s ease,box-shadow .15s ease,opacity .15s ease;
  white-space:nowrap;
  min-height:44px;
  touch-action:manipulation;
  -webkit-tap-highlight-color:transparent;
  user-select:none;
}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--grad-cta);color:#fff;box-shadow:0 8px 24px -8px rgba(124,58,237,.55)}
.btn-primary:hover{box-shadow:0 10px 30px -6px rgba(124,58,237,.65);transform:translateY(-1px)}
.btn-ghost{background:var(--surface);color:var(--text);border:1px solid var(--border-soft)}
.btn-ghost:hover{background:var(--surface-strong)}
.btn-outline{background:transparent;border:1.5px solid var(--violet);color:var(--violet)}
.btn-danger{background:linear-gradient(135deg,#f43f5e,#e11d48);color:#fff}
.btn-sm{padding:9px 14px;font-size:13px;border-radius:10px;min-height:38px}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none !important}
.icon-btn{width:44px;height:44px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border-soft);background:var(--surface);cursor:pointer;color:var(--text);touch-action:manipulation;-webkit-tap-highlight-color:transparent}

/* ---------- Forms ---------- */
label{font-size:13px;font-weight:700;color:var(--text-dim);display:block;margin:14px 0 6px}
input,select,textarea{
  width:100%;
  /* 16px minimum stops iOS Safari from auto-zooming the viewport on focus */
  font-size:16px;
  padding:13px 14px;border-radius:12px;
  border:1.5px solid var(--border-soft);background:var(--surface-solid);color:var(--text);
  font-family:var(--font-body);transition:border-color .15s ease, box-shadow .15s ease;
  touch-action:manipulation;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 4px rgba(124,58,237,.15)}
input::placeholder{color:var(--text-faint)}
.field-error{color:var(--danger);font-size:13px;margin-top:6px;min-height:16px}
.help-text{font-size:12px;color:var(--text-faint);margin-top:4px}

/* ---------- Badges / pills ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700}
.badge-live{background:rgba(22,163,74,.15);color:var(--success)}
.badge-upcoming{background:rgba(59,130,246,.15);color:var(--blue)}
.badge-expired{background:rgba(107,114,128,.18);color:var(--text-faint)}
.badge-role-student{background:rgba(6,182,212,.15);color:#0891b2}
.badge-role-teacher{background:rgba(245,158,11,.15);color:#b45309}
.badge-role-admin{background:rgba(236,72,153,.15);color:#be185d}
.dot{width:7px;height:7px;border-radius:50%;background:currentColor;display:inline-block}

/* ---------- Nav ---------- */
.navbar{position:sticky;top:0;z-index:50;padding:14px 0;padding-top:max(14px, env(safe-area-inset-top))}
.navbar-inner{
  max-width:1180px;margin:0 auto;padding:10px 18px;border-radius:20px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:18px}
.brand img{height:30px;width:auto}
.brand .tag{font-size:10px;font-weight:700;color:#fff;background:var(--grad-cta);padding:2px 8px;border-radius:999px;letter-spacing:.04em}
.nav-links{display:flex;gap:26px;align-items:center;font-weight:600;font-size:14px}
.nav-links a{color:var(--text-dim)}
.nav-links a:hover{color:var(--text)}

/* ---------- Nav hamburger (dashboard header actions collapse on narrow screens) ---------- */
.navbar-inner{position:relative}
.nav-hamburger{display:none;background:var(--surface-solid);border:1.5px solid var(--border-soft);border-radius:10px;width:42px;height:42px;align-items:center;justify-content:center;font-size:19px;cursor:pointer;color:var(--text);flex-shrink:0;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.navbar-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
@media (max-width:760px){
  .nav-hamburger{display:inline-flex}
  .navbar-actions{
    display:none;position:absolute;top:calc(100% + 8px);right:0;left:0;
    flex-direction:column;align-items:stretch;gap:8px;padding:14px;
    background:var(--surface-solid);border:1px solid var(--border-soft);border-radius:16px;
    box-shadow:0 16px 32px -12px rgba(0,0,0,.3);z-index:60;
  }
  .navbar-actions.open{display:flex}
  .navbar-actions .btn,.navbar-actions .badge{width:100%;justify-content:center;text-align:center}
  .navbar-actions .theme-toggle{align-self:center}
}

/* ---------- Theme toggle ---------- */
.theme-toggle{width:44px;height:44px;border-radius:50%;border:1px solid var(--border-soft);background:var(--surface);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:18px;touch-action:manipulation;-webkit-tap-highlight-color:transparent}

/* ---------- Utility text gradient ---------- */
.text-grad{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Tables ---------- */
table{width:100%;border-collapse:collapse}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border-soft);font-size:14px}
th{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--text-faint);font-weight:700}
tr:last-child td{border-bottom:none}
.table-wrap{overflow-x:auto;border-radius:var(--radius-md)}

/* ---------- Progress ---------- */
.progress{height:9px;background:var(--border-soft);border-radius:999px;overflow:hidden}
.progress > div{height:100%;background:var(--grad-cta);transition:width .5s ease}

/* ---------- Modal ---------- */
.modal-overlay{position:fixed;inset:0;background:rgba(10,8,20,.55);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200;padding:20px}
.modal-box{width:100%;max-width:440px;max-height:90vh;overflow-y:auto}

/* ---------- Toast ---------- */
#toast-stack{position:fixed;bottom:20px;right:20px;z-index:400;display:flex;flex-direction:column;gap:10px;max-width:340px}
.toast{padding:14px 18px;border-radius:14px;font-size:14px;font-weight:600;animation:toastin .2s ease}
.toast.ok{background:linear-gradient(135deg,#16a34a,#22c55e);color:#fff}
.toast.err{background:linear-gradient(135deg,#e11d48,#f43f5e);color:#fff}
.toast.info{background:linear-gradient(135deg,#7c3aed,#3b82f6);color:#fff}
@keyframes toastin{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* ---------- Loader ---------- */
.spinner{width:22px;height:22px;border-radius:50%;border:3px solid rgba(124,58,237,.2);border-top-color:var(--violet);animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.skeleton{background:linear-gradient(90deg,var(--border-soft) 25%,rgba(124,58,237,.12) 50%,var(--border-soft) 75%);background-size:200% 100%;animation:shimmer 1.4s infinite;border-radius:10px}
@keyframes shimmer{to{background-position:-200% 0}}

/* ---------- Stat card ---------- */
.stat-card{padding:20px;border-radius:var(--radius-md)}
.stat-card .num{font-family:var(--font-display);font-size:28px;font-weight:800}
.stat-card .lbl{font-size:12px;color:var(--text-faint);font-weight:700;text-transform:uppercase;letter-spacing:.04em}

/* ---------- Footer ---------- */
.site-footer{padding:50px 0 30px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
.footer-grid h4{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint);margin-bottom:14px}
.footer-grid ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.footer-grid a{color:var(--text-dim);font-size:14px}
.footer-grid a:hover{color:var(--violet)}
.footer-bottom{margin-top:36px;padding-top:22px;border-top:1px solid var(--border-soft);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--text-faint)}

@media (max-width:860px){
  .nav-links{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
}

/* ---------- Empty states & insight boxes (shared across dashboards) ---------- */
.empty-note{padding:24px;text-align:center;color:var(--text-faint);font-size:14px}
.ai-box{padding:14px;border-radius:12px;color:#fff}
.ai-weak{background:#dc2626}
.ai-strong{background:#16a34a}

/* ---------- Bulk-action checkboxes in tables ---------- */
td input[type="checkbox"], th input[type="checkbox"]{width:18px;height:18px;accent-color:var(--violet)}

/* ---------- Notifications bell ---------- */
.notif-bell-wrap{position:relative;display:inline-block}
#notifBell{position:relative;background:var(--surface-solid);border:1px solid var(--border-soft);border-radius:12px;width:40px;height:40px;font-size:17px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.notif-badge{position:absolute;top:-4px;right:-4px;background:#e11d48;color:#fff;font-size:10px;font-weight:800;border-radius:999px;min-width:16px;height:16px;padding:0 4px;display:flex;align-items:center;justify-content:center}
.notif-panel{position:absolute;top:48px;right:0;width:320px;max-height:420px;overflow-y:auto;background:var(--surface-solid);border:1px solid var(--border-soft);border-radius:14px;box-shadow:0 12px 30px rgba(0,0,0,.18);z-index:500}
.notif-panel-head{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border-bottom:1px solid var(--border-soft);font-size:14px}
.notif-item{padding:12px 14px;border-bottom:1px solid var(--border-soft);cursor:pointer}
.notif-item:last-child{border-bottom:none}
.notif-item.unread{background:rgba(124,58,237,.08)}
.notif-item.unread .notif-title::before{content:'●';color:#7c3aed;margin-right:6px;font-size:10px}
.notif-title{font-weight:700;font-size:13px}
.notif-msg{font-size:12px;color:var(--text-dim);margin-top:2px;white-space:pre-wrap}
.notif-meta{font-size:11px;color:var(--text-faint);margin-top:6px}
.notif-empty{padding:24px;text-align:center;color:var(--text-faint);font-size:13px}
.btn-link{background:none;border:none;color:#7c3aed;font-weight:700;font-size:12px;cursor:pointer;padding:0}