/* ============================================================
   Kuwait Curriculum — Unified Theme System
   Three themes: math (navy+gold), english (green+flag), free (amber+teal)
   ============================================================ */

/* ============ THEME: MATH (65% — dark navy + gold/cyan) ============ */
[data-theme="math"]{
  --bg-1:#0a0e1f; --bg-2:#131830;
  --surface:rgba(255,255,255,.04); --surface-2:rgba(255,255,255,.07);
  --border:rgba(255,255,255,.08); --border-strong:rgba(255,255,255,.15);
  --fg:#f5f3ee; --muted:#9ca0b3;
  --accent:#ffc857; --accent-2:#f4a261;
  --accent-3:#4ecdc4; --rose:#f43f5e; --emerald:#10d9a3; --violet:#a78bfa;
  --hero-grad:linear-gradient(135deg,rgba(255,200,87,.18),rgba(78,205,196,.1) 60%,rgba(167,139,250,.08));
  --flag-c1:#ffc857; --flag-c2:#fff; --flag-c3:#f43f5e;
  --sat:1;
}

/* ============ THEME: ENGLISH (25% — dark green + Kuwait flag, saturated) ============ */
[data-theme="english"]{
  --bg-1:#04110C; --bg-2:#0B241A;
  --surface:rgba(10,42,30,.55); --surface-2:rgba(10,42,30,.78);
  --border:rgba(255,213,74,.22); --border-strong:rgba(255,213,74,.4);
  --fg:#F6F3E8; --muted:#C9D5C8;
  --accent:#FFD54A; --accent-2:#E0B01A;
  --accent-3:#00C853; --rose:#FF2D4A; --emerald:#16F08A; --violet:#a78bfa;
  --hero-grad:linear-gradient(135deg,rgba(0,122,61,.55),rgba(6,20,15,.55) 55%,rgba(206,17,38,.28));
  --flag-c1:#00C853; --flag-c2:#fff; --flag-c3:#CE1126;
  --sat:1.35;
}

/* ============ THEME: FREE (10% — warm dark amber + teal) ============ */
[data-theme="free"]{
  --bg-1:#1a0f0a; --bg-2:#2a1810;
  --surface:rgba(255,255,255,.04); --surface-2:rgba(255,255,255,.07);
  --border:rgba(255,255,255,.08); --border-strong:rgba(255,255,255,.15);
  --fg:#fdf6ec; --muted:#c4a98c;
  --accent:#ff8c42; --accent-2:#ff6b35;
  --accent-3:#2dd4bf; --rose:#ef4444; --emerald:#34d399; --violet:#c084fc;
  --hero-grad:linear-gradient(135deg,rgba(255,140,66,.2),rgba(45,212,191,.1) 60%,rgba(192,132,252,.08));
  --flag-c1:#ff8c42; --flag-c2:#fff; --flag-c3:#2dd4bf;
  --sat:1.1;
}

/* ============ BASE ============ */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  min-height:100vh; color:var(--fg);
  font-family:'IBM Plex Sans Arabic','Plus Jakarta Sans','Source Sans 3',system-ui,sans-serif;
  background:var(--bg-1); line-height:1.65; overflow-x:hidden;
  -webkit-font-smoothing:antialiased; filter:saturate(var(--sat));
}
[data-theme] body{
  background:
    radial-gradient(ellipse 80% 60% at 18% 8%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 50%),
    radial-gradient(ellipse 70% 50% at 82% 28%, color-mix(in srgb, var(--accent-3) 14%, transparent), transparent 50%),
    radial-gradient(ellipse 60% 60% at 50% 100%, color-mix(in srgb, var(--violet) 10%, transparent), transparent 50%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 50%, var(--bg-1) 100%);
}
[data-theme] body::before{
  content:""; position:fixed; inset:0; pointer-events:none; z-index:0;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 .07 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity:.5; mix-blend-mode:overlay;
}
[data-theme] body::after{
  content:""; position:fixed; inset:0; pointer-events:none; z-index:-2;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
}

/* ============ LAYOUT ============ */
.flag-bar{position:sticky;top:0;z-index:40;display:grid;grid-template-columns:1fr 1fr 1fr;height:6px}
.flag-bar span:nth-child(1){background:var(--flag-c1)}
.flag-bar span:nth-child(2){background:var(--flag-c2)}
.flag-bar span:nth-child(3){background:var(--flag-c3)}

/* Scroll progress indicator (top bar) */
.scroll-progress{
  position:fixed;top:6px;left:0;z-index:45;height:3px;width:0;
  background:linear-gradient(90deg,var(--accent),var(--accent-3));
  transition:width .15s ease-out;box-shadow:0 0 12px color-mix(in srgb,var(--accent) 50%,transparent);
}

/* Back-to-top button */
.back-top{
  position:fixed;bottom:24px;right:24px;z-index:45;
  width:48px;height:48px;border-radius:50%;border:1px solid var(--border-strong);
  background:var(--surface-2);backdrop-filter:blur(14px);
  display:grid;place-items:center;cursor:pointer;
  color:var(--accent);font-size:1.2rem;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .3s,transform .3s;
}
.back-top.show{opacity:1;transform:translateY(0);pointer-events:auto}
.back-top:hover{background:color-mix(in srgb,var(--accent) 15%,var(--surface-2));border-color:var(--accent)}

/* Resume-reading toast (chapter bookmark) */
.resume-toast{
  position:fixed;bottom:84px;right:24px;z-index:46;
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;border-radius:14px;
  background:var(--surface-2);backdrop-filter:blur(18px);
  border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);
  box-shadow:0 14px 36px rgba(0,0,0,.4);color:var(--fg);font-size:.86rem;
  max-width:340px;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .35s,transform .35s;
}
.resume-toast.show{opacity:1;transform:translateY(0);pointer-events:auto}
.resume-toast > span:first-child{font-size:1.2rem}
.resume-toast button{
  border:1px solid var(--border-strong);background:rgba(255,255,255,.05);
  color:var(--fg);padding:5px 10px;border-radius:8px;cursor:pointer;font-size:.78rem;font-weight:700;
  transition:all .2s;
}
.resume-toast button.resume-yes{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#1a1208;border-color:transparent;
}
.resume-toast button.resume-yes:hover{filter:brightness(1.08)}
.resume-toast button.resume-no:hover{background:rgba(255,255,255,.1)}

/* Toast notification (for share/copy feedback) */
.kw-toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  z-index:60;padding:12px 20px;border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#1a1208;
  font-weight:700;font-size:.88rem;box-shadow:0 14px 36px rgba(0,0,0,.4);
  opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;max-width:90vw;
}
.kw-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Celebration confetti (achievement unlock) */
.kw-confetti{
  position:fixed;top:-20px;z-index:9999;pointer-events:none;
  width:8px;height:14px;border-radius:2px;
  display:flex;align-items:center;justify-content:center;
  animation:kw-confetti-fall linear forwards;
}
@keyframes kw-confetti-fall{
  0%{transform:translateY(0) rotate(0deg);opacity:1}
  100%{transform:translateY(110vh) rotate(720deg);opacity:0}
}

/* Study time pill (reading timer on summary pages) */
.study-time-pill{
  position:fixed;top:16px;right:16px;z-index:44;
  display:flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:999px;
  background:var(--surface-2);backdrop-filter:blur(14px);
  border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);
  color:var(--accent);font-size:.78rem;font-weight:700;
  font-family:'JetBrains Mono',monospace;font-variant-numeric:tabular-nums;
  box-shadow:0 6px 18px rgba(0,0,0,.25);
  pointer-events:none;
}

/* Focus mode toggle button */
.focus-mode-toggle{
  position:fixed;top:48px;right:16px;z-index:44;
  width:36px;height:36px;border-radius:50%;
  background:var(--surface-2);backdrop-filter:blur(14px);
  border:1px solid var(--border-strong);
  color:var(--accent);font-size:1rem;cursor:pointer;
  display:grid;place-items:center;
  transition:all .25s;
  opacity:.55;
}
.focus-mode-toggle:hover{opacity:1;transform:scale(1.08)}
.focus-mode-toggle.active{
  opacity:1;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#1a1208;border-color:transparent;
  box-shadow:0 8px 22px color-mix(in srgb,var(--accent) 40%,transparent);
}

/* Focus mode active: dim non-focused chapters, expand focused one */
body.focus-mode-active .chapter{
  opacity:.32;filter:blur(.5px);transform:scale(.985);
  transition:opacity .35s,filter .35s,transform .35s;
}
body.focus-mode-active .chapter.focused{
  opacity:1;filter:none;transform:scale(1);
  border-color:var(--accent);
  box-shadow:0 18px 44px color-mix(in srgb,var(--accent) 22%,transparent);
}
body.focus-mode-active .chapter.focused::before{
  background:linear-gradient(180deg,var(--accent),var(--accent-3));
  width:6px;
}
body.focus-mode-active .chapter-head{cursor:pointer}
body.focus-mode-active .chapter.focused .chapter-head{
  background:color-mix(in srgb,var(--accent) 8%,transparent);
  border-radius:14px;margin:-6px -8px 6px;padding:6px 8px;
}
body.focus-mode-active::after{
  content:"Focus mode — click a chapter to expand · Esc to exit";
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%);
  z-index:44;padding:8px 16px;border-radius:999px;
  background:var(--surface-2);backdrop-filter:blur(14px);
  border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);
  color:var(--accent);font-size:.78rem;font-weight:700;
  pointer-events:none;
}

/* Print revision sheet button */
.print-revision-btn{
  position:fixed;top:80px;right:16px;z-index:44;
  width:36px;height:36px;border-radius:50%;
  background:var(--surface-2);backdrop-filter:blur(14px);
  border:1px solid var(--border-strong);
  color:var(--accent);font-size:1rem;cursor:pointer;
  display:grid;place-items:center;
  transition:all .25s;opacity:.55;
}
.print-revision-btn:hover{opacity:1;transform:scale(1.08)}
.print-revision-btn:hover{background:color-mix(in srgb,var(--accent) 15%,var(--surface-2));border-color:var(--accent)}

/* Sound toggle button (quiz/exam pages) */
.sound-toggle{
  position:fixed;top:16px;right:60px;z-index:44;
  width:36px;height:36px;border-radius:50%;
  background:var(--surface-2);backdrop-filter:blur(14px);
  border:1px solid var(--border-strong);
  font-size:1rem;cursor:pointer;
  display:grid;place-items:center;
  transition:all .25s;opacity:.7;
}
.sound-toggle:hover{opacity:1;transform:scale(1.08);border-color:var(--accent)}

/* Keyboard shortcut help overlay */
.kw-help-overlay{
  position:fixed;inset:0;z-index:9998;
  background:rgba(10,14,31,0.88);backdrop-filter:blur(10px);
  display:flex;align-items:center;justify-content:center;padding:24px;
  animation:fadeUp .25s ease;
}
.kw-help-overlay.hidden{display:none}
.kw-help-card{
  position:relative;max-width:560px;width:100%;
  background:var(--surface-2);backdrop-filter:blur(22px);
  border:1px solid var(--border-strong);border-radius:24px;
  padding:32px 28px;box-shadow:0 24px 60px rgba(0,0,0,.5);
}
.kw-help-close{
  position:absolute;top:14px;right:14px;
  width:32px;height:32px;border-radius:50%;
  background:transparent;border:1px solid var(--border);
  color:var(--fg);font-size:1.3rem;cursor:pointer;line-height:1;
  display:grid;place-items:center;transition:all .2s;
}
.kw-help-close:hover{background:color-mix(in srgb,var(--rose) 15%,transparent);border-color:var(--rose);color:var(--rose)}
.kw-help-card h2{
  font-family:'Fraunces',serif;font-size:1.6rem;font-weight:700;
  margin-bottom:6px;
}
.kw-help-sub{color:var(--muted);font-size:.85rem;margin-bottom:18px}
.kw-help-sub kbd,.kw-help-row kbd{
  display:inline-block;padding:2px 7px;border-radius:5px;
  background:color-mix(in srgb,var(--accent) 16%,transparent);
  border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);
  font-family:'JetBrains Mono',monospace;font-size:.78rem;font-weight:700;color:var(--accent);
}
.kw-help-grid{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.kw-help-row{
  display:flex;align-items:center;gap:10px;
  padding:8px 12px;border-radius:10px;
  background:rgba(255,255,255,.03);
  font-size:.88rem;color:var(--fg);
}
.kw-help-row span{flex:1;color:color-mix(in srgb,var(--fg) 88%,transparent)}
.kw-help-row kbd{flex-shrink:0}
.kw-help-section{margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}
.kw-help-section h3{
  font-family:'Fraunces',serif;font-size:.95rem;color:var(--accent-3);
  margin-bottom:8px;
}
.kw-help-note{color:var(--muted);font-size:.82rem;font-style:italic}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* Personal chapter notes */
.chapter-notes{
  margin-top:18px;padding-top:14px;border-top:1px dashed var(--border);
}
.chapter-notes-label{
  font-size:.78rem;font-weight:700;color:var(--accent-3);
  margin-bottom:6px;letter-spacing:.02em;
  transition:color .3s;
}
.chapter-notes-label.saved{color:var(--emerald)}
.chapter-notes-label.saved::after{content:" ✓ saved"}
.chapter-notes-input{
  width:100%;min-height:42px;resize:vertical;
  background:rgba(0,0,0,.2);color:var(--fg);
  border:1px solid var(--border);border-radius:10px;
  padding:10px 12px;font-family:inherit;font-size:.86rem;line-height:1.5;
  outline:none;transition:border-color .2s,background .2s;
}
.chapter-notes-input:focus{
  border-color:var(--accent);background:rgba(0,0,0,.28);
  box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 15%,transparent);
}
.chapter-notes-input::placeholder{color:var(--muted);font-style:italic}

/* Chapter read progress markers */
.chapter-read::before{
  background:linear-gradient(180deg,var(--emerald),var(--accent-3)) !important;
}
.chapter-read .chapter-num{
  background:linear-gradient(135deg,var(--emerald),var(--accent-3)) !important;
  box-shadow:0 6px 18px color-mix(in srgb,var(--emerald) 30%,transparent) !important;
}
.chapter-read .chapter-title::after{
  content:" ✓ read";font-size:.7rem;font-weight:700;color:var(--emerald);
  margin-inline-start:8px;text-transform:uppercase;letter-spacing:.04em;
}
.toc-read::after{
  content:" ✓";color:var(--emerald);font-weight:700;font-size:.8rem;
}
.toc-read{color:var(--emerald) !important}

.wrap{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:22px 18px 80px}

/* ============ HEADER ============ */
.appbar{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:18px 0 28px}
.brand{display:flex;gap:14px;align-items:center}
.mark{
  width:54px;height:54px;border-radius:18px;display:grid;place-items:center;font-size:1.6rem;font-weight:900;
  background:linear-gradient(145deg,var(--accent),var(--accent-2) 55%,var(--accent-3));
  box-shadow:0 10px 30px color-mix(in srgb,var(--accent) 35%,transparent);
  color:#1a1208;
}
.brand h1{
  font-family:'Fraunces',serif;font-size:clamp(1.35rem,3vw,2.1rem);letter-spacing:-.03em;line-height:1.1;
  background:linear-gradient(90deg,#fff 10%,var(--accent) 55%,var(--accent-3) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.brand p{color:var(--muted);font-size:.9rem;margin-top:2px}
.home-link{
  color:var(--accent);text-decoration:none;font-weight:700;font-size:.88rem;
  border:1px solid var(--border-strong);padding:10px 16px;border-radius:999px;
  background:color-mix(in srgb,var(--accent) 10%,transparent);transition:all .25s;
  display:inline-flex;align-items:center;gap:6px;
}
.home-link:hover{background:color-mix(in srgb,var(--accent) 20%,transparent);transform:translateY(-1px)}

/* ============ HERO ============ */
.hero{
  position:relative;overflow:hidden;border-radius:28px;padding:32px 28px;margin-bottom:28px;
  background:var(--hero-grad);border:1px solid var(--border-strong);
  box-shadow:0 22px 60px rgba(0,0,0,.38);
}
.hero h2{font-family:'Fraunces',serif;font-size:clamp(1.5rem,3.5vw,2.4rem);line-height:1.2;max-width:24ch}
.hero p{max-width:65ch;color:color-mix(in srgb,var(--fg) 88%,transparent);margin-top:12px;font-size:1.02rem}
.pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.pill{
  font-size:.74rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase;
  padding:6px 12px;border-radius:999px;background:rgba(0,0,0,.28);border:1px solid rgba(255,255,255,.14);
  color:var(--accent);
}
.pill.alt{color:var(--accent-3);border-color:color-mix(in srgb,var(--accent-3) 40%,transparent)}

/* ============ SECTIONS ============ */
.section{margin:36px 0}
.section-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;
  background:color-mix(in srgb,var(--accent) 12%,transparent);
  border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);
  border-radius:999px;font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent);
}
.section-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse-soft 2s infinite}
@keyframes pulse-soft{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.7)}}
.section-title{font-family:'Fraunces',serif;font-size:clamp(1.5rem,3vw,2rem);font-weight:700;letter-spacing:-.02em}
.section-sub{color:var(--muted);font-size:.95rem;margin-top:4px}

/* ============ CARDS ============ */
.glass{
  background:var(--surface);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--border);border-radius:20px;
}
.glass-strong{
  background:var(--surface-2);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
  border:1px solid var(--border-strong);border-radius:24px;
}
.card-pad{padding:24px 22px}

/* ============ CHAPTERS / NOTES ============ */
.chapter{
  background:var(--surface);border:1px solid var(--border);border-radius:22px;
  padding:28px 26px;margin-bottom:20px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  position:relative;overflow:hidden;
}
.chapter::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--accent),var(--accent-3));
}
.chapter-head{display:flex;align-items:center;gap:14px;margin-bottom:18px;flex-wrap:wrap}
.chapter-num{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;flex-shrink:0;
  font-family:'Fraunces',serif;font-weight:900;font-size:1.3rem;color:#1a1208;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 8px 22px color-mix(in srgb,var(--accent) 30%,transparent);
}
.chapter-title{font-family:'Fraunces',serif;font-size:1.45rem;font-weight:700;line-height:1.2}
.chapter-meta{color:var(--muted);font-size:.82rem;margin-top:2px}

.note-h{font-family:'Fraunces',serif;font-size:1.12rem;font-weight:700;margin:20px 0 10px;color:var(--accent)}
.note-p{margin:10px 0;color:color-mix(in srgb,var(--fg) 90%,transparent)}
.note-ul{margin:10px 0 10px 22px}
.note-ul li{margin:6px 0;color:color-mix(in srgb,var(--fg) 88%,transparent)}
.note-ul li::marker{color:var(--accent)}
.note-box{
  background:color-mix(in srgb,var(--accent) 8%,transparent);
  border:1px solid color-mix(in srgb,var(--accent) 25%,transparent);
  border-radius:14px;padding:14px 16px;margin:14px 0;
}
.note-box.tip{background:color-mix(in srgb,var(--emerald) 8%,transparent);border-color:color-mix(in srgb,var(--emerald) 25%,transparent)}
.note-box.warn{background:color-mix(in srgb,var(--rose) 8%,transparent);border-color:color-mix(in srgb,var(--rose) 25%,transparent)}
.note-box .lbl{font-weight:800;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px;display:block}
.note-box.tip .lbl{color:var(--emerald)}
.note-box.warn .lbl{color:var(--rose)}
.note-box:not(.tip):not(.warn) .lbl{color:var(--accent)}

/* formula / equation block */
.formula{
  font-family:'JetBrains Mono','Courier New',monospace;font-size:1.05rem;
  background:rgba(0,0,0,.3);border:1px solid var(--border);border-radius:12px;
  padding:14px 18px;margin:12px 0;text-align:center;color:var(--accent);
  overflow-x:auto;
}
.formula .op{color:var(--accent-3)}
.formula .var{color:var(--fg)}

/* tables */
.kw-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.92rem}
.kw-table th,.kw-table td{padding:10px 12px;border:1px solid var(--border);text-align:left}
.kw-table th{background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent);font-weight:700;font-size:.85rem}
.kw-table tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.kw-table td{color:color-mix(in srgb,var(--fg) 88%,transparent)}

/* ============ CHEAT SHEET ============ */
.cheat{
  background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 14%,transparent),color-mix(in srgb,var(--accent-3) 8%,transparent));
  border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);border-radius:22px;padding:24px 22px;margin:24px 0;
}
.cheat h3{font-family:'Fraunces',serif;font-size:1.3rem;color:var(--accent);margin-bottom:14px;display:flex;align-items:center;gap:10px}
.cheat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:14px}
.cheat-item{
  background:rgba(0,0,0,.25);border:1px solid var(--border);border-radius:14px;padding:14px;
}
.cheat-item .k{font-weight:700;color:var(--accent);font-size:.88rem;margin-bottom:4px}
.cheat-item .v{color:color-mix(in srgb,var(--fg) 88%,transparent);font-size:.86rem;line-height:1.55}
.cheat-item .v code{font-family:'JetBrains Mono',monospace;color:var(--accent-3);background:rgba(0,0,0,.3);padding:1px 5px;border-radius:4px;font-size:.82rem}

/* ============ TRICKY QUESTIONS ============ */
.tricky{
  background:color-mix(in srgb,var(--rose) 6%,transparent);
  border:1px solid color-mix(in srgb,var(--rose) 25%,transparent);
  border-radius:18px;padding:20px;margin-bottom:14px;
}
.tricky .tq{font-weight:600;margin-bottom:10px;color:var(--fg)}
.tricky .tq::before{content:"🧩 ";margin-right:4px}
.tricky .ta{
  margin-top:10px;padding:12px 14px;border-radius:10px;
  background:color-mix(in srgb,var(--emerald) 8%,transparent);
  border-inline-start:3px solid var(--emerald);font-size:.92rem;
}
.tricky .ta strong{color:var(--emerald)}

/* ============ QUIZ / EXAM ENGINE ============ */
.qcard{
  background:var(--surface);border:1px solid var(--border);border-radius:18px;
  padding:20px 18px;margin-bottom:16px;backdrop-filter:blur(10px);
}
.qcard .qhead{display:flex;gap:10px;align-items:flex-start;margin-bottom:14px}
.qnum{
  flex-shrink:0;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;
  background:color-mix(in srgb,var(--accent) 22%,transparent);color:var(--accent);
  font-weight:800;font-size:.82rem;font-family:'JetBrains Mono',monospace;
}
.qtext{font-size:1rem;line-height:1.7;color:var(--fg);flex:1}
.qtext .marks{
  display:inline-block;margin-inline-start:8px;font-size:.72rem;font-weight:700;
  color:var(--accent-3);background:color-mix(in srgb,var(--accent-3) 12%,transparent);
  padding:2px 8px;border-radius:999px;
}
.qtext .trick-flag{
  display:inline-block;margin-inline-start:6px;font-size:.72rem;font-weight:700;
  color:var(--rose);background:color-mix(in srgb,var(--rose) 12%,transparent);
  padding:2px 8px;border-radius:999px;
}
/* Bookmark star button on questions */
.qstar{
  flex-shrink:0;width:28px;height:28px;border-radius:8px;
  background:transparent;border:1px solid var(--border);
  color:var(--muted);font-size:1rem;cursor:pointer;line-height:1;
  display:grid;place-items:center;transition:all .2s;
  align-self:flex-start;
}
.qstar:hover{color:var(--gold,#ffc857);border-color:var(--gold,#ffc857);background:color-mix(in srgb,#ffc857 10%,transparent)}
.qstar.starred{color:#ffc857;border-color:#ffc857;background:color-mix(in srgb,#ffc857 18%,transparent)}

.opt{
  display:flex;gap:12px;align-items:flex-start;width:100%;text-align:inherit;
  background:rgba(255,255,255,.035);border:1.5px solid var(--border);
  color:var(--fg);padding:14px 16px;border-radius:14px;margin:8px 0;cursor:pointer;
  font-size:.97rem;transition:all .22s cubic-bezier(.2,.8,.2,1);
}
.opt:hover:not(:disabled){border-color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,transparent);transform:translateX(3px)}
.opt .ltr{
  flex:0 0 30px;height:30px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.08);font-weight:800;font-size:.78rem;font-family:'JetBrains Mono',monospace;
  transition:all .22s;
}
.opt.picked{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}
.opt.picked .ltr{background:var(--accent);color:#1a1208}
.opt.right{border-color:var(--emerald);background:color-mix(in srgb,var(--emerald) 14%,transparent)}
.opt.right .ltr{background:var(--emerald);color:#06231a}
.opt.wrong{border-color:var(--rose);background:color-mix(in srgb,var(--rose) 14%,transparent)}
.opt.wrong .ltr{background:var(--rose);color:#2a0a13}
.opt:disabled{cursor:default}
.opt .otxt{flex:1;line-height:1.55}

.explain{
  display:none;margin-top:14px;padding:14px 16px;border-radius:12px;
  background:color-mix(in srgb,var(--emerald) 9%,transparent);
  border-inline-start:4px solid var(--emerald);color:color-mix(in srgb,var(--fg) 92%,transparent);font-size:.9rem;line-height:1.6;
}
.explain.show{display:block;animation:fadeUp .4s ease}
.explain .ex-key{font-weight:800;color:var(--emerald);display:block;margin-bottom:4px}

/* passage block (for English exams) */
.passage{
  background:color-mix(in srgb,var(--accent) 8%,transparent);
  border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);
  border-radius:18px;padding:18px 20px;margin-bottom:20px;
}
.passage h4{color:var(--accent);margin-bottom:10px;font-family:'Fraunces',serif;font-size:1.1rem}
.passage p{color:color-mix(in srgb,var(--fg) 90%,transparent);line-height:1.75}

/* multi-part exam question (Kuwait style) */
.exam-part{margin:14px 0;padding:14px 16px;border:1px dashed var(--border-strong);border-radius:12px;background:rgba(0,0,0,.15)}
.exam-part .plabel{font-weight:700;color:var(--accent-3);font-size:.85rem;margin-bottom:6px}

/* ============ BUTTONS ============ */
.btn{
  border:0;cursor:pointer;font-weight:800;font-size:1rem;
  padding:15px 22px;border-radius:16px;transition:all .25s;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
}
.btn-primary{
  color:#1a1208;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 12px 28px color-mix(in srgb,var(--accent) 30%,transparent);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.07);box-shadow:0 16px 36px color-mix(in srgb,var(--accent) 40%,transparent)}
.btn-secondary{
  color:var(--fg);font-weight:700;
  background:rgba(255,255,255,.05);border:1px solid var(--border-strong);
}
.btn-secondary:hover{background:rgba(255,255,255,.1);border-color:var(--accent);transform:translateY(-2px)}
.btn-ghost{
  background:transparent;color:var(--muted);border:1px solid var(--border);
  font-weight:600;padding:11px 18px;border-radius:12px;cursor:pointer;transition:all .25s;
  display:inline-flex;align-items:center;gap:6px;
}
.btn-ghost:hover{color:var(--fg);background:rgba(255,255,255,.04);border-color:var(--accent)}

/* ============ PROGRESS / TOOLBAR ============ */
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.progress{height:8px;background:rgba(255,255,255,.08);border-radius:99px;overflow:hidden;margin:12px 0 22px}
.progress>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-3));transition:width .4s ease;border-radius:99px}

/* ============ RESULTS ============ */
.scorebox{
  text-align:center;padding:36px 22px;border-radius:28px;margin-top:24px;
  background:var(--surface-2);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);
  box-shadow:0 22px 60px rgba(0,0,0,.38);backdrop-filter:blur(22px);
}
.ring{
  width:160px;height:160px;margin:0 auto 18px;border-radius:50%;display:grid;place-items:center;
  background:conic-gradient(var(--accent) calc(var(--pct)*1%), rgba(255,255,255,.1) 0);
  transition:background 1s ease;
}
.ring b{
  width:128px;height:128px;border-radius:50%;display:grid;place-items:center;
  background:var(--bg-1);font-size:2rem;font-family:'Fraunces',serif;font-weight:900;color:var(--accent);
}
.stats{display:flex;justify-content:center;gap:32px;flex-wrap:wrap;margin-top:18px}
.stats strong{display:block;font-size:1.6rem;font-family:'Fraunces',serif}
.ok{color:var(--emerald)}.bad{color:var(--rose)}.neu{color:var(--accent-3)}
.verdict{margin-top:12px;font-size:1.05rem;color:color-mix(in srgb,var(--fg) 90%,transparent)}

/* ============ GRID (cards) ============ */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.topic-card{
  position:relative;overflow:hidden;cursor:default;
  background:var(--surface);border:1px solid var(--border);border-radius:20px;
  padding:22px 20px;transition:all .35s cubic-bezier(.2,.8,.2,1);backdrop-filter:blur(14px);
  display:flex;flex-direction:column;gap:8px;
}
a.topic-card{color:inherit;text-decoration:none;cursor:pointer}
.topic-card:hover{transform:translateY(-6px);border-color:color-mix(in srgb,var(--accent) 45%,transparent);box-shadow:0 22px 44px -22px color-mix(in srgb,var(--accent) 30%,transparent)}
.topic-card .ticon{font-size:1.9rem;width:50px;height:50px;border-radius:14px;display:grid;place-items:center;background:color-mix(in srgb,var(--accent) 14%,transparent)}
.topic-card h3{font-family:'Fraunces',serif;font-size:1.15rem}
.topic-card p{color:var(--muted);font-size:.88rem}
.topic-card .badge{
  align-self:flex-start;margin-top:auto;font-size:.72rem;font-weight:800;
  color:#1a1208;background:linear-gradient(90deg,var(--accent),var(--accent-3));
  padding:4px 12px;border-radius:999px;letter-spacing:.04em;
}
/* Topic-card action buttons (Start + Shuffle) */
.topic-actions{display:flex;gap:8px;margin-top:10px}
.topic-actions .topic-start,.topic-actions .topic-shuffle{
  border:none;cursor:pointer;font-weight:700;border-radius:10px;transition:all .25s;
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
}
.topic-actions .topic-start{
  flex:1;padding:10px 14px;font-size:.9rem;color:#1a1208;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 6px 18px -6px color-mix(in srgb,var(--accent) 50%,transparent);
}
.topic-actions .topic-start:hover{transform:translateY(-1px);filter:brightness(1.08)}
.topic-actions .topic-shuffle{
  width:42px;font-size:1rem;color:var(--accent-3);
  background:color-mix(in srgb,var(--accent-3) 12%,transparent);
  border:1px solid color-mix(in srgb,var(--accent-3) 30%,transparent);
}
.topic-actions .topic-shuffle:hover{
  background:color-mix(in srgb,var(--accent-3) 22%,transparent);transform:translateY(-1px);
  border-color:var(--accent-3)
}

/* ============ TOC / NAV ============ */
.toc{
  background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:18px 20px;margin-bottom:26px;
  backdrop-filter:blur(14px);
}
.toc h4{font-family:'Fraunces',serif;color:var(--accent);margin-bottom:10px;font-size:1rem}
.toc ol{margin:0 0 0 20px}
.toc li{margin:5px 0}
.toc a{color:color-mix(in srgb,var(--fg) 85%,transparent);text-decoration:none;font-size:.9rem;transition:color .2s}
.toc a:hover{color:var(--accent)}

/* ============ FOOTER ============ */
footer.appfoot{
  margin-top:50px;padding:26px 0;text-align:center;color:var(--muted);font-size:.82rem;
  border-top:1px solid var(--border);
}
footer.appfoot .kw{color:var(--accent);font-weight:700}

/* ============ UTILS ============ */
.hidden{display:none !important}
.fade-up{animation:fadeUp .5s cubic-bezier(.2,.8,.2,1) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
.fade-up-1{animation-delay:.05s}.fade-up-2{animation-delay:.12s}.fade-up-3{animation-delay:.19s}.fade-up-4{animation-delay:.26s}

/* highlight */
.hl{color:var(--accent);font-weight:700}
.hl-2{color:var(--accent-3);font-weight:700}
.hl-3{color:var(--violet);font-weight:700}
code.inline{font-family:'JetBrains Mono',monospace;color:var(--accent-3);background:rgba(0,0,0,.3);padding:1px 6px;border-radius:5px;font-size:.85rem}

/* RTL support for Arabic */
[dir="rtl"]{direction:rtl;text-align:right}
[dir="rtl"] .note-ul{margin:10px 22px 10px 0}
[dir="rtl"] .chapter::before{left:auto;right:0}
[dir="rtl"] .qcard .qhead{flex-direction:row}

/* scrollbar */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.1);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.2)}

/* responsive */
@media(max-width:640px){
  .wrap{padding:14px 12px 70px}
  .hero{padding:24px 18px}
  .chapter{padding:20px 16px}
  .card-pad{padding:18px 16px}
}

/* print */
@media print{
  .flag-bar,.home-link,.toolbar,.btn.no-print,.no-print{display:none !important}
  [data-theme] body{background:#fff !important;color:#111 !important;filter:none !important}
  [data-theme] body::before,[data-theme] body::after{display:none !important}
  .chapter,.qcard,.glass,.glass-strong,.hero{break-inside:avoid;border-color:#ccc !important;background:#fff !important;backdrop-filter:none !important}
  .note-p,.note-ul li,.qtext{color:#111 !important}
}

/* perf: skip offscreen question cards */
.qcard{content-visibility:auto;contain-intrinsic-size:auto 140px}
.chapter{contain:layout style}
img,svg{max-width:100%;height:auto}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}