/* ---------- info-quiz — styles ---------- */
:root{
  --bg:#070b16;
  --surface:rgba(255,255,255,.055);
  --surface-2:rgba(255,255,255,.035);
  --border:rgba(255,255,255,.10);
  --text:#eef2ff;
  --muted:#9aa6c4;
  --text-dim:#7b86a8;

  --primary:#7c5cff;
  --primary-glow:rgba(124,92,255,.35);
  --primary-2:#22d3ee;
  --accent:#f472b6;

  --ok:#34d399;
  --ok-glow:rgba(52,211,153,.22);
  --bad:#fb7185;
  --bad-glow:rgba(251,113,133,.22);
  --warn:#fbbf24;

  --radius:22px;
  --radius-lg:28px;
  --shadow:0 22px 55px rgba(0,0,0,.55);
  --shadow-sm:0 8px 24px rgba(0,0,0,.35);
  --ease:cubic-bezier(.23,1,.32,1);
  --ease-out:cubic-bezier(.16,1,.3,1);

  --timer-easy:20s;
  --timer-medium:18s;
  --timer-hard:15s;

  --max-width:1200px;
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001s !important; transition-duration:.001s !important;}
  .blob{animation:none !important;}
  .pulse-dot{animation:none !important;}
}

*,*::before,*::after{ box-sizing:border-box; }

html,body{
  margin:0;
  padding:0;
  font-family:'Cairo','Segoe UI',system-ui,-apple-system,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.5;
  direction:rtl;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
body{ overflow-x:hidden; }

a{ color:var(--primary-2); text-decoration:none; }
button{
  font-family:inherit;
  border:none;
  background:none;
  cursor:pointer;
  color:inherit;
  border-radius:12px;
}
button:focus-visible{ outline:2px solid var(--primary); outline-offset:2px; }
[hidden]{ display:none !important; }
b,strong{ font-weight:700; }
.kbd, kbd{
  font-family:'Space Grotesk',monospace;
  font-size:.85rem; background:rgba(255,255,255,.06);
  border:1px solid var(--border); border-radius:6px;
  padding:.15rem .45rem; color:var(--primary-2);
}

/* ---------- background ---------- */
.bg-decor{
  position:fixed; inset:0; overflow:hidden; z-index:-2; pointer-events:none;
}
.blob{
  position:absolute; border-radius:50%; filter:blur(52px); opacity:.55; z-index:-1;
  animation:blob 10s ease-in-out infinite alternate;
}
.blob-1{ width:70vmax; height:70vmax; top:-25%; left:10%; background:#7c5cff; animation-delay:0s; }
.blob-2{ width:60vmax; height:60vmax; bottom:-20%; right:10%; background:#22d3ee; animation-delay:-2s; }
.blob-3{ width:50vmax; height:50vmax; top:20%; right:5%; background:#f472b6; animation-delay:-4s; }
@keyframes blob{
  0%{ transform:translate(0,0) scale(1); }
  100%{ transform:translate(6vmax,-6vmax) scale(1.15); }
}
.grid-lines{
  position:absolute; inset:0; z-index:-1;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 0%,#000,transparent 70%);
}
.noise{
  position:absolute; inset:0; z-index:-1; opacity:.25;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* ---------- shell ---------- */
.app-shell{ max-width:var(--max-width); margin:0 auto; padding:0 1rem; }
.boot-error{ display:flex; flex-direction:column; gap:.5rem; align-items:center; text-align:center;
  margin:1rem auto; padding:1rem 1.25rem; max-width:34rem; border-radius:18px;
  background:rgba(255,107,107,.12); border:1px solid rgba(255,107,107,.45); color:var(--text); }
.boot-error[hidden]{ display:none; }
.boot-error b{ font-size:1.05rem; }
.boot-error span{ color:var(--muted); font-size:.92rem; }
.boot-error .boot-retry{ margin-top:.35rem; }
.topbar{
  display:flex; align-items:center; gap:.75rem;
  padding:1rem 0; position:relative; z-index:5;
  border-bottom:1px solid var(--border);
  margin-bottom:1rem;
}
.brand{ display:flex; align-items:center; gap:.75rem; text-decoration:none; color:var(--text); }
.brand-mark{
  width:36px; height:36px; border-radius:10px; display:grid; place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:0 0 24px var(--primary-glow);
}
.brand-mark svg{ width:18px; height:18px; }
.brand-text{ font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:1.15rem; line-height:1.1; }
.brand-text small{ display:block; color:var(--muted); font-size:.75rem; font-weight:500; }

.topbar-actions{ margin-left:auto; display:flex; gap:.5rem; align-items:center; flex-wrap:wrap; }
.chip{
  display:flex; align-items:center; gap:.45rem;
  background:var(--surface); border:1px solid var(--border);
  border-radius:10px; padding:.35rem .7rem; font-size:.82rem; color:var(--text-dim);
}
.chip-score{ border-color:rgba(124,92,255,.45); color:var(--primary); }
.chip-streak{ border-color:rgba(34,211,238,.45); color:var(--primary-2); }
.chip-icon{ width:20px; height:20px; display:grid; place-items:center; }
.chip-icon svg{ width:16px; height:16px; stroke-width:1.4; }
.chip-body{ font-variant-numeric:tabular-nums; }
.chip .num{ font-weight:700; font-size:1rem; }

.icon-btn{
  width:36px; height:36px; border-radius:10px; display:grid; place-items:center;
  background:var(--surface); border:1px solid var(--border); color:var(--muted);
}
.icon-btn svg{ width:18px; height:18px; stroke-width:1.5; }
.icon-btn.ic-off{ display:none; }
.icon-btn[aria-pressed="false"] .ic-on{ display:none; }
.icon-btn[aria-pressed="true"] .ic-off{ display:none; }

/* ---------- hero / home ---------- */
.screen{ display:none; }
.screen.is-active{ display:block; }
.hero{
  display:grid; grid-template-columns:1fr 1fr; gap:2rem;
  align-items:center; padding:2rem 0;
}
.hero-copy{ display:flex; flex-direction:column; gap:1rem; }
.eyebrow{
  display:inline-flex; align-items:center; gap:.45rem;
  font-size:.82rem; font-weight:600; color:var(--primary-2); letter-spacing:.05em;
}
.pulse-dot{
  width:8px; height:8px; border-radius:50%; background:var(--primary-2);
  box-shadow:0 0 14px var(--primary-2);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{ 0%,100%{ opacity:.55; transform:scale(1); } 50%{ opacity:1; transform:scale(1.25); } }
.hero h1{ font-family:'Space Grotesk',sans-serif; font-size:2.6rem; font-weight:800; line-height:1.12; margin:.2rem 0; letter-spacing:-0.02em; }
.grad-text{
  background:linear-gradient(135deg,#fff,var(--primary-2),var(--primary));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.lede{ color:var(--muted); font-size:1.02rem; max-width:46ch; }
.feature-row{
  display:flex; gap:.6rem; flex-wrap:wrap; margin-top:.5rem;
}
.feature-row li{
  display:flex; align-items:center; gap:.5rem;
  background:var(--surface); border:1px solid var(--border);
  border-radius:10px; padding:.35rem .7rem; font-size:.8rem; color:var(--text-dim);
}
.feature-row li .feat-ico{ font-size:1.1rem; }

.hero-art{ position:relative; display:flex; flex-direction:column; gap:1rem; align-items:center; }
.code-card{
  width:100%; max-width:340px; background:var(--surface-2); border:1px solid var(--border);
  border-radius:16px; overflow:hidden; box-shadow:var(--shadow-sm);
  position:relative; z-index:2;
}
.code-head{
  display:flex; align-items:center; gap:.45rem; padding:.7rem 1rem;
  background:rgba(0,0,0,.25); border-bottom:1px solid var(--border);
}
.dot{ width:9px; height:9px; border-radius:50%; }
.dot.r{ background:#ff5f56; box-shadow:0 0 10px #ff5f56; }
.dot.y{ background:#ffbd2e; box-shadow:0 0 10px #ffbd2e; }
.dot.g{ background:#27c93f; box-shadow:0 0 10px #27c93f; }
.code-file{ margin-left:auto; font-size:.75rem; font-family:'Space Grotesk',monospace; color:var(--muted); letter-spacing:.04em; }
.code-body pre{
  margin:0; padding:1rem 1rem 1.2rem; font-family:'Space Grotesk',monospace; font-size:.86rem;
  line-height:1.6; color:#cfd8f0; overflow:auto;
}
.c-key{ color:#c084fc; }
.c-cls{ color:#a5f3fc; font-weight:600; }
.c-fn{ color:#fbbf24; }
.c-str{ color:#34d399; }
.c-key::before{ content:''; }

.float-badge{
  position:absolute; display:inline-flex; align-items:center; gap:.5rem;
  background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.15);
  border-radius:10px; padding:.45rem .8rem; font-size:.8rem; font-weight:600;
  color:var(--text); box-shadow:var(--shadow-sm); z-index:2;
}
.fb-1{ top:-10%; left:-6%; transform:rotate(-8deg); }
.fb-2{ top:65%; right:-8%; transform:rotate(10deg); }
.fb-3{ bottom:-12%; left:30%; transform:rotate(-6deg); }

/* ---------- join info ---------- */
.setup-panel{
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:1.5rem 1.75rem; box-shadow:var(--shadow);
}
.join-info{
  display:grid; gap:.5rem; margin-top:1.25rem; padding:1rem 1.1rem;
  border:1px solid var(--border); border-radius:14px; background:var(--surface-2);
}
.join-info-row{
  display:flex; align-items:center; justify-content:space-between; gap:.75rem;
  font-size:.9rem;
}
.join-info-label{ color:var(--muted); font-weight:600; }
.join-info-row b{ font-family:'Space Grotesk',sans-serif; color:var(--text); }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  padding:.85rem 1.4rem; border-radius:12px; font-weight:700; font-size:1rem;
  line-height:1.3; transition:transform .12s, opacity .15s, box-shadow .2s;
}
.btn svg{ width:20px; height:20px; stroke-width:1.7; flex-shrink:0; }
.quiz-actions .btn{ width:44px; height:44px; padding:0; }
.btn:active{ transform:translateY(-1px) scale(.985); }
.btn:disabled{ opacity:.55; cursor:default; pointer-events:none; }
.btn-primary{
  background:linear-gradient(135deg,var(--primary),#6a46d9);
  color:#fff; box-shadow:0 10px 30px rgba(124,92,255,.35);
}
.btn-primary:not(:disabled):hover{ transform:translateY(-2px); box-shadow:0 18px 40px rgba(124,92,255,.45); }
.btn-ghost{
  background:var(--surface); border:1px solid var(--border); color:var(--text);
}
.btn-ghost:hover{ background:var(--surface-2); border-color:rgba(255,255,255,.25); }
.btn-lg{ padding:1rem 2rem; font-size:1.05rem; }

.records{
  display:flex; gap:1rem; margin-top:1.5rem; padding-top:1.2rem; border-top:1px solid var(--border);
  flex-wrap:wrap;
}
.record{ display:flex; align-items:center; gap:.55rem; font-size:.85rem; color:var(--text-dim); }
.record b{ font-size:1.1rem; font-family:'Space Grotesk',sans-serif; color:var(--text); }
.record-ico{ font-size:1.15rem; }

/* ---------- quiz layout ---------- */
.main{ min-height:calc(100vh - 4rem); }
.main .screen{ padding:1rem 0 3rem; }

.quiz-layout{
  display:flex; gap:1.5rem; align-items:flex-start;
}
@media (max-width:980px){
  .quiz-layout{ flex-direction:column; }
}

.quiz-main{ flex:1; min-width:0; }
.quiz-side{
  width:min(320px,100%);
  display:flex; flex-direction:column; gap:1rem;
}

/* top bar of quiz */
.quiz-top{
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
  margin-bottom:.2rem;
}
.progress-wrap{ flex:1; min-width:0; }
.q-counter{ display:block; font-size:.85rem; font-weight:600; color:var(--muted); letter-spacing:.04em; }
.q-counter b{ color:var(--primary-2); font-size:1rem; }
.q-cat{ display:block; font-size:.9rem; color:var(--text-dim); font-weight:600; margin-top:.15rem; }
.progress-track{
  height:8px; border-radius:4px; background:rgba(255,255,255,.08);
  overflow:hidden; margin-top:.5rem;
}
.progress-fill{
  height:100%; width:0%; border-radius:4px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));
  transition:width .5s var(--ease); box-shadow:0 0 20px var(--primary-glow);
}

.timer{
  position:relative; width:84px; height:84px; display:grid; place-items:center; flex-shrink:0;
}
.timer-ring{ width:100%; height:100%; transform:rotate(-90deg); }
.ring-bg{ fill:none; stroke:rgba(255,255,255,.08); stroke-width:8; r:34; }
.ring-fg{
  fill:none; stroke:linear-gradient(90deg,var(--primary),var(--primary-2));
  stroke-width:8; stroke-linecap:round; stroke-dasharray:213.6; stroke-dashoffset:0;
  transition:stroke-dashoffset .3s linear, stroke .3s;
}
.timer-text{ position:absolute; inset:0; display:grid; place-items:center; line-height:1; }
.timer-text b{ font-family:'Space Grotesk',sans-serif; font-size:1.35rem; font-weight:700; }
.timer-text small{ font-size:.68rem; color:var(--text-dim); font-weight:600; }

/* question card */
.question-card{
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:1.6rem 1.75rem; box-shadow:var(--shadow);
  margin-bottom:1.5rem; animation:cardIn .5s var(--ease-out);
}
@keyframes cardIn{
  from{ opacity:0; transform:translateY(14px); }
  to{ opacity:1; transform:none; }
}
.q-head{
  display:flex; align-items:center; justify-content:space-between; gap:.75rem;
  margin-bottom:1rem; flex-wrap:wrap;
}
.diff-tag{
  font-size:.75rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase;
  padding:.28rem .7rem; border-radius:999px; border:1px solid rgba(255,255,255,.15);
}
.diff-tag.easy{ color:var(--ok); background:rgba(52,211,153,.12); border-color:rgba(52,211,153,.35); }
.diff-tag.medium{ color:var(--warn); background:rgba(251,191,36,.14); border-color:rgba(251,191,36,.35); }
.diff-tag.hard{ color:var(--bad); background:rgba(251,113,133,.14); border-color:rgba(251,113,133,.35); }
.q-points-hint{
  font-size:.78rem; color:var(--text-dim); margin-left:auto;
}
.q-text{
  font-family:'Space Grotesk',sans-serif; font-size:1.45rem; font-weight:700;
  line-height:1.35; margin:0 0 1.3rem; letter-spacing:-0.01em; color:var(--text);
}

/* options */
.options{
  display:grid; grid-template-columns:repeat(2,1fr); gap:.85rem;
}
.option{
  position:relative; display:flex; align-items:center; gap:.75rem;
  padding:1rem 1rem 1rem 1rem; border-radius:14px;
  background:var(--surface-2); border:1px solid var(--border); color:var(--text);
  text-align:right; transition:all .18s var(--ease);
}
.option:hover{ border-color:rgba(124,92,255,.45); background:rgba(255,255,255,.04); transform:translateX(4px); }
.option:active{ transform:scale(.99); }
.option-key{
  width:28px; height:28px; border-radius:8px; display:grid; place-items:center;
  font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:1rem;
  background:rgba(255,255,255,.06); border:1px solid var(--border);
  color:var(--muted); flex-shrink:0;
}
.option-text{ flex:1; min-width:0; font-size:1.02rem; font-weight:600; word-break:keep-all; }
.option-mark{ width:22px; height:22px; border-radius:50%; border:2px solid var(--border); flex-shrink:0; transition:all .25s var(--ease); }

.option.correct{
  border-color:var(--ok); background:rgba(52,211,153,.18); color:var(--text);
}
.option.correct .option-mark{
  background:var(--ok); border-color:var(--ok); box-shadow:0 0 20px var(--ok-glow);
}
.option.wrong{
  border-color:var(--bad); background:rgba(251,113,133,.16); color:var(--text);
}
.option.wrong .option-mark{
  background:var(--bad); border-color:var(--bad); box-shadow:0 0 20px var(--bad-glow);
}
.option.locked{ cursor:default; opacity:.7; pointer-events:none; }

/* feedback */
.feedback{
  margin-top:1.3rem; display:flex; gap:1rem; align-items:flex-start;
  animation:fbIn .4s var(--ease-out);
}
@keyframes fbIn{ from{ opacity:0; transform:translateY(10px); } to{ opacity:1; transform:none; } }
.fb-icon{
  width:42px; height:42px; border-radius:12px; display:grid; place-items:center;
  font-size:1.7rem; flex-shrink:0;
}
.fb-icon.ok{ background:rgba(52,211,153,.18); border:1px solid rgba(52,211,153,.45); color:var(--ok); }
.fb-icon.bad{ background:rgba(251,113,133,.18); border:1px solid rgba(251,113,133,.45); color:var(--bad); }
.fb-body{ flex:1; min-width:0; }
.fb-body h4{
  margin:0 0 .35rem; font-size:1.05rem; font-weight:700; letter-spacing:-0.01em;
}
.fb-body p{ margin:0 0 .75rem; font-size:.93rem; color:var(--text-dim); line-height:1.5; }
.points-break{
  display:flex; gap:.5rem; flex-wrap:wrap;
}
.points-break span{
  font-size:.75rem; font-weight:600; padding:.25rem .6rem; border-radius:8px;
  border:1px solid rgba(255,255,255,.12); color:var(--muted); background:var(--surface-2);
}
.points-break span.ok{ color:var(--ok); border-color:rgba(52,211,153,.45); background:rgba(52,211,153,.12); }
.points-break span.bad{ color:var(--bad); border-color:rgba(251,113,133,.45); background:rgba(251,113,133,.12); }

/* quiz actions */
.quiz-actions{
  display:flex; align-items:center; justify-content:space-between; gap:.8rem;
  margin-bottom:1rem;
}
.actions-center{ display:flex; align-items:center; gap:.5rem; }
.icon-btn-text{ width:44px; height:44px; padding:0; }
.btn-primary[disabled]{ opacity:.5; box-shadow:none; }

/* side */
.side-card{
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:1rem 1.2rem; box-shadow:var(--shadow-sm);
}
.side-title{ margin:0 0 .75rem; font-size:.9rem; font-weight:600; color:var(--muted); text-transform:uppercase; letter-spacing:.04em; }
.nav-grid{
  display:grid; grid-template-columns:repeat(8,1fr); gap:.45rem; margin-bottom:.75rem;
}
.nav-btn{
  width:34px; height:34px; border-radius:9px; display:grid; place-items:center;
  font-size:.78rem; font-weight:700; font-family:'Space Grotesk',sans-serif;
  background:rgba(255,255,255,.04); border:1px solid var(--border); color:var(--text-dim);
  position:relative;
}
.nav-btn.now{ background:var(--primary); border-color:var(--primary); color:#fff; box-shadow:0 0 20px var(--primary-glow); }
.nav-btn.ok{ background:var(--ok); border-color:var(--ok); color:#06231a; box-shadow:0 0 16px var(--ok-glow); }
.nav-btn.bad{ background:var(--bad); border-color:var(--bad); color:#fff; box-shadow:0 0 16px var(--bad-glow); }
.legend{ display:flex; gap:.8rem; flex-wrap:wrap; font-size:.75rem; color:var(--text-dim); }
.dot{
  width:9px; height:9px; border-radius:50%; display:inline-block;
}
.dot.ok{ background:var(--ok); box-shadow:0 0 10px var(--ok); }
.dot.bad{ background:var(--bad); box-shadow:0 0 10px var(--bad); }
.dot.now{ background:var(--primary); box-shadow:0 0 10px var(--primary); }
.dot.idle{ background:var(--text-dim); opacity:.35; }
.mini-stats{ display:flex; gap:.75rem; }
.mini{ flex:1; display:flex; flex-direction:column; align-items:flex-end; text-align:right; }
.mini b{ font-size:1.1rem; font-family:'Space Grotesk',sans-serif; color:var(--text); }
.mini span{ font-size:.75rem; color:var(--muted); }

/* ---------- result ---------- */
.result-wrap{ max-width:760px; margin:0 auto; }
.result-hero{ margin-bottom:1.5rem; }
.panel{
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:1.75rem 2rem; box-shadow:var(--shadow);
}
.score-ring-wrap{ position:relative; width:210px; height:210px; margin:0 auto 1rem; display:flex; align-items:center; justify-content:center; }
.score-ring{ width:100%; height:100%; transform:rotate(-90deg); }
.sr-bg{ fill:none; stroke:rgba(255,255,255,.08); stroke-width:14; r:78; }
.sr-fg{
  fill:none; stroke:url(#scoreGrad); stroke-width:14; stroke-linecap:round;
  r:78; stroke-dasharray:490; stroke-dashoffset:490;
  transition:stroke-dashoffset 1.2s var(--ease);
}
.score-center{ position:absolute; inset:0; display:grid; place-items:center; text-align:center; line-height:1; }
.score-center b{ font-family:'Space Grotesk',sans-serif; font-size:2.2rem; font-weight:800; color:var(--text); }
.score-center small{ color:var(--muted); font-size:1rem; }
.result-badge{
  display:inline-flex; align-items:center; gap:.5rem; font-size:.8rem; font-weight:700;
  letter-spacing:.05em; padding:.35rem .85rem; border-radius:999px;
  background:rgba(124,92,255,.14); border:1px solid rgba(124,92,255,.35); color:var(--primary-2);
}
.result-copy{ text-align:center; }
.result-copy h2{ font-family:'Space Grotesk',sans-serif; font-size:2rem; font-weight:800; margin:.3rem 0 .5rem; line-height:1.2; }
.result-copy p{ color:var(--muted); font-size:1rem; max-width:44ch; margin:0 auto 1.2rem; }
.result-actions{
  display:flex; gap:.7rem; justify-content:center; flex-wrap:wrap;
}

.stats-row{ display:grid; grid-template-columns:repeat(4,1fr); gap:.75rem; margin-bottom:1.5rem; }
.stat{
  padding:1.1rem 1rem; border-radius:14px; background:var(--surface-2); border:1px solid var(--border);
  text-align:right; display:flex; flex-direction:column; align-items:flex-end; gap:.3rem;
}
.stat-ico{ font-size:1.4rem; }
.stat b{ font-family:'Space Grotesk',sans-serif; font-size:1.35rem; font-weight:700; color:var(--text); }
.stat small{ font-size:.76rem; color:var(--text-dim); }

.review-head{ display:flex; align-items:center; justify-content:space-between; gap:1rem; margin-bottom:1rem; flex-wrap:wrap; }
.review-filters{ display:flex; gap:.45rem; }
.mini-filter{
  font-size:.78rem; font-weight:600; padding:.3rem .7rem; border-radius:8px;
  border:1px solid var(--border); color:var(--text-dim); background:rgba(255,255,255,.04);
}
.mini-filter.is-active{ background:var(--primary); border-color:var(--primary); color:#fff; }
.review-list{ display:flex; flex-direction:column; gap:.75rem; }
.review-item{
  padding:1rem; border-radius:14px; border:1px solid var(--border);
  background:rgba(255,255,255,.03); animation:itemIn .4s var(--ease-out);
}
@keyframes itemIn{ from{ opacity:0; transform:translateX(-12px); } to{ opacity:1; transform:none; } }
.review-item.wrong{ border-color:rgba(251,113,133,.35); background:rgba(251,113,133,.06); }
.review-item.correct{ border-color:rgba(52,211,153,.35); background:rgba(52,211,153,.06); }
.review-item .q{ font-size:.86rem; font-weight:600; color:var(--text-dim); margin-bottom:.5rem; white-space:pre-wrap; }
.review-meta{
  display:flex; gap:.6rem; font-size:.78rem;
}
.review-meta span{ display:flex; align-items:center; gap:.35rem; }
.review-meta .ok{ color:var(--ok); font-weight:700; }
.review-meta .bad{ color:var(--bad); font-weight:700; }

/* ---------- preview section ---------- */
.preview-section{
  margin-top:2rem;
}
.preview-title{
  margin:0 0 1rem; font-size:1rem; font-weight:600; color:var(--muted);
  text-transform:uppercase; letter-spacing:.05em;
}
.preview-grid{
  display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:1rem;
}
.preview-card{
  background:var(--surface-2); border:1px solid var(--border); border-radius:16px;
  padding:1rem 1.2rem; display:flex; flex-direction:column; gap:.75rem;
}
.preview-q{
  font-size:.92rem; font-weight:600; color:var(--text); line-height:1.4; margin:0;
}
.preview-opts{
  display:flex; flex-direction:column; gap:.4rem;
}
.preview-opt{
  font-size:.8rem; color:var(--text-dim); background:var(--surface);
  border:1px solid var(--border); border-radius:8px; padding:.45rem .7rem;
}
.preview-note{
  margin:.75rem 0 0; font-size:.82rem; color:var(--text-dim); text-align:center;
}

/* footer */
.footer{
  border-top:1px solid var(--border); padding:1.2rem 0; margin-top:2rem;
  color:var(--text-dim); font-size:.8rem; display:flex; gap:.7rem; align-items:center; flex-wrap:wrap;
}

/* ---------- modals & toasts ---------- */
.modal{
  position:fixed; inset:0; display:none; align-items:center; justify-content:center;
  z-index:60; background:rgba(0,0,0,.55); backdrop-filter:blur(6px);
}
.modal.is-open{ display:flex; }
.modal-card{
  width:min(360px,88vw); background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:1.75rem; box-shadow:var(--shadow);
  text-align:center; transform:scale(.92); opacity:0; transition:transform .25s, opacity .25s;
}
.modal.is-open .modal-card{ transform:scale(1); opacity:1; }
.modal-ico{ font-size:2.4rem; margin-bottom:.75rem; }

/* ---------- confirm bar ---------- */
.confirm-bar{ display:flex; justify-content:center; gap:.75rem; margin-top:1rem; }
.confirm-bar[hidden]{ display:none; }

/* ---------- sound toggle ---------- */
#soundBtn.is-off{ opacity:.45; }

/* ---------- question map cells ---------- */
.nav-cell{
  width:100%; aspect-ratio:1; border-radius:8px; border:1px solid var(--border);
  background:rgba(255,255,255,.04); color:var(--muted); font-weight:700; font-size:.85rem;
  display:grid; place-items:center; transition:transform .12s, background .2s, color .2s;
}
.nav-cell:hover{ transform:translateY(-1px); background:rgba(255,255,255,.08); }
.nav-cell.ok{ background:rgba(52,211,153,.16); color:var(--ok); border-color:rgba(52,211,153,.4); }
.nav-cell.bad{ background:rgba(251,113,133,.16); color:var(--bad); border-color:rgba(251,113,133,.4); }
.nav-cell.now{ background:var(--primary); color:#fff; border-color:var(--primary); }
.nav-cell.idle{ opacity:.45; }/* ---------- report option chosen marker ---------- */
.report-opt.chosen{ box-shadow:inset 0 0 0 1px var(--primary-2); }

.toast{
  position:fixed; bottom:1.2rem; left:50%; transform:translateX(-50%);
  z-index:70; padding:.8rem 1.2rem; border-radius:10px;
  background:rgba(7,11,22,.92); border:1px solid var(--border); color:var(--muted);
  font-size:.85rem; box-shadow:var(--shadow); opacity:0; pointer-events:none;
  transition:opacity .3s, transform .3s;
}
.toast.show{ opacity:1; transform:translateX(-50%) translateY(-8px); }

.form-control-join{
  width:100%; padding:.75rem 1rem; border-radius:10px; border:1px solid var(--border);
  background:rgba(0,0,0,.25); color:var(--text); font-family:inherit; font-size:.9rem;
}
.form-control-join:focus{ border-color:var(--primary); outline:none; }

.form-control-join{
  width:100%; padding:.75rem 1rem; border-radius:10px; border:1px solid var(--border);
  background:rgba(0,0,0,.25); color:var(--text); font-family:inherit; font-size:.9rem;
}
.form-control-join:focus{ border-color:var(--primary); outline:none; }

/* ---------- welcome / rules ---------- */
.rules-panel{
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:1.5rem 1.75rem; box-shadow:var(--shadow);
  margin-top:1.5rem;
}
.panel-title{
  margin:0 0 1rem; font-size:1rem; font-weight:700; color:var(--muted);
  text-transform:uppercase; letter-spacing:.05em; display:flex; align-items:center; gap:.5rem;
}
.panel-title::before{ content:'📋'; font-size:1.1rem; }
.rules-list{ display:flex; flex-direction:column; gap:.85rem; }
.rule-item{
  display:flex; gap:.8rem; align-items:flex-start;
  background:var(--surface-2); border:1px solid var(--border);
  border-radius:12px; padding:.85rem 1rem;
}
.rule-num{
  width:28px; height:28px; border-radius:50%; display:grid; place-items:center;
  font-weight:800; font-size:.9rem; color:#fff; background:var(--primary);
  box-shadow:0 0 16px var(--primary-glow); flex-shrink:0;
}
.rule-item div{ font-size:.92rem; color:var(--text); line-height:1.5; }
.rule-item strong{ color:var(--primary-2); }

/* ---------- quiz multi-select ---------- */
.option.multi{ cursor:pointer; }
.option.multi .option-mark{
  width:24px; height:24px; border-radius:6px; border:2px solid var(--border);
  background:transparent; transition:all .25s var(--ease);
}
.option.multi.selected .option-mark{
  background:var(--primary); border-color:var(--primary);
  box-shadow:0 0 20px var(--primary-glow);
}
.option.multi.selected .option-mark::after{
  content:'✓'; position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
  color:#fff; font-weight:900; font-size:1rem;
}
.q-type-badge{
  font-size:.7rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase;
  padding:.25rem .6rem; border-radius:8px; border:1px solid rgba(255,255,255,.15);
  background:rgba(255,255,255,.06); color:var(--muted);
}
.q-type-badge.multi{ color:var(--accent); border-color:rgba(244,114,182,.4); background:rgba(244,114,182,.12); }
.hint-bar{
  display:flex; align-items:center; gap:.5rem; margin-top:1rem; padding:.7rem 1rem;
  background:rgba(34,211,238,.1); border:1px solid rgba(34,211,238,.3);
  border-radius:10px; color:var(--primary-2); font-size:.85rem; font-weight:600;
}
.hint-text{ display:flex; align-items:center; gap:.4rem; }

/* ---------- report ---------- */
.report-list{ display:flex; flex-direction:column; gap:.8rem; }
.report-item{
  padding:1rem; border-radius:14px; border:1px solid var(--border);
  background:rgba(255,255,255,.03); animation:itemIn .4s var(--ease-out);
}
.report-item.correct{ border-color:rgba(52,211,153,.35); background:rgba(52,211,153,.06); }
.report-item.wrong{ border-color:rgba(251,113,133,.35); background:rgba(251,113,133,.06); }
.report-q{ font-size:.88rem; font-weight:600; color:var(--text-dim); margin-bottom:.5rem; white-space:pre-wrap; }
.report-meta{ display:flex; gap:.6rem; font-size:.78rem; margin-bottom:.5rem; }
.report-meta span{ display:flex; align-items:center; gap:.35rem; }
.report-meta .ok{ color:var(--ok); font-weight:700; } .report-meta .bad{ color:var(--bad); font-weight:700; }
.report-options{ display:flex; flex-wrap:wrap; gap:.4rem; }
.report-opt{
  font-size:.78rem; padding:.35rem .7rem; border-radius:8px; border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.04); color:var(--text-dim);
}
.report-opt.ok{ color:var(--ok); border-color:rgba(52,211,153,.45); background:rgba(52,211,153,.12); font-weight:700; }
.report-opt.bad{ color:var(--bad); border-color:rgba(251,113,133,.45); background:rgba(251,113,133,.12); font-weight:700; }
.points-earned{ font-family:'Space Grotesk',sans-serif; font-weight:800; color:var(--primary-2); }

/* ---------- attempts & retake ---------- */
.attempt-banner{
  margin-top:1rem; padding:.75rem 1rem; border-radius:12px; font-size:.85rem; font-weight:600;
  border:1px solid rgba(251,191,36,.35); background:rgba(251,191,36,.12); color:var(--warn);
}
.attempt-banner.approved{ border-color:rgba(52,211,153,.4); background:rgba(52,211,153,.12); color:var(--ok); }
.retake-status{
  margin:.75rem 0 0; font-size:.82rem; color:var(--warn); text-align:center;
}
#retakeReason{ width:100%; resize:vertical; font-family:inherit; font-size:.9rem; }

/* ---------- account (login / register) ---------- */
.auth-tabs{
  display:flex; gap:.35rem; padding:.3rem; margin-bottom:1.25rem;
  background:var(--surface-2); border:1px solid var(--border); border-radius:14px;
}
.auth-tab{
  flex:1; padding:.6rem .5rem; border:none; border-radius:11px; cursor:pointer;
  background:transparent; color:var(--muted); font-family:inherit; font-size:.85rem; font-weight:700;
  transition:background .18s ease, color .18s ease;
}
.auth-tab:hover{ color:var(--text); }
.auth-tab.is-active{ background:var(--primary); color:#fff; box-shadow:0 6px 18px rgba(124,92,255,.28); }
.auth-pane{ animation:fbIn .3s ease both; }
.setup-title{
  margin:0 0 1rem; font-size:1rem; font-weight:800; color:var(--text);
  display:flex; align-items:center; gap:.5rem;
}
.form-group label,
.form-group > label{
  display:block; font-size:.85rem; font-weight:600; color:var(--muted); margin-bottom:.4rem;
}
.form-error{
  margin:.85rem 0 0; padding:.6rem .75rem; border-radius:10px; font-size:.82rem; font-weight:600;
  color:var(--bad); background:rgba(251,113,133,.12); border:1px solid rgba(251,113,133,.3);
}
.account-chip{
  display:flex; align-items:center; justify-content:space-between; gap:.75rem;
  padding:.75rem .9rem; border-radius:14px;
  background:linear-gradient(135deg,rgba(124,92,255,.16),rgba(34,211,238,.1));
  border:1px solid rgba(124,92,255,.28);
}
.account-chip-main{ display:flex; flex-direction:column; gap:.15rem; min-width:0; }
.account-chip-main b{ font-size:.95rem; color:var(--text); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.account-chip-main span{ font-size:.75rem; color:var(--muted); }
.btn-sm{ padding:.45rem .8rem; font-size:.78rem; }
.row2{ display:grid; grid-template-columns:1fr 1fr; gap:.75rem; }

@media (max-width:560px){
  .row2{ grid-template-columns:1fr; gap:0; }
  .account-chip{ flex-direction:column; align-items:stretch; text-align:center; }
}

.scientific-analysis{
  margin-top:1.25rem; padding:1.25rem; border-radius:16px;
  background:linear-gradient(135deg,rgba(124,92,255,.15),rgba(34,211,238,.1));
  border:1px solid rgba(124,92,255,.25);
}
.scientific-analysis h4{
  margin:0 0 .75rem; font-size:.95rem; color:var(--primary-2); font-weight:700;
  display:flex; align-items:center; gap:.5rem;
}
.scientific-analysis h4::before{ content:'🔬'; }
.scientific-analysis p{ margin:0; color:var(--text); line-height:1.6; font-size:.92rem; }

/* ---------- leaderboard ---------- */
.rank-panel{ margin-top:1.25rem; }
.rank-panel.standalone{ margin:0 auto; max-width:760px; }
.rank-panel .panel-title::before{ content:'🏆'; }

.rank-session{
  margin:0 0 1rem; font-size:.85rem; color:var(--text-dim); text-align:center;
}

.rank-hero{
  display:flex; align-items:center; gap:1rem; padding:1rem 1.25rem; margin-bottom:1.25rem;
  border-radius:16px; background:rgba(255,255,255,.04); border:1px solid var(--border);
}
.rank-hero.top{
  background:linear-gradient(135deg,rgba(124,92,255,.22),rgba(34,211,238,.12));
  border-color:rgba(124,92,255,.45);
}
.rank-medal{
  min-width:74px; text-align:center; font-weight:900; font-size:1.05rem; color:var(--primary-2);
  padding:.5rem .6rem; border-radius:12px; background:rgba(0,0,0,.3); border:1px solid var(--border);
}
.rank-hero.top .rank-medal{ background:rgba(124,92,255,.3); border-color:rgba(124,92,255,.6); color:#fff; }
.rank-hero-meta{ display:flex; flex-direction:column; gap:.2rem; flex:1; min-width:0; }
.rank-hero-meta b{ font-size:1rem; color:var(--text); }
.rank-hero-meta span{ font-size:.82rem; color:var(--text-dim); }
.rank-hero-total{ font-size:.78rem; color:var(--muted); white-space:nowrap; }

.rank-list{ display:flex; flex-direction:column; gap:.5rem; }
.rank-row{
  display:grid; grid-template-columns:88px 1fr auto auto auto; gap:.75rem; align-items:center;
  padding:.7rem .9rem; border-radius:12px; background:rgba(255,255,255,.035);
  border:1px solid var(--border); font-size:.88rem;
}
.rank-row.me{
  background:linear-gradient(90deg,rgba(124,92,255,.22),rgba(124,92,255,.06));
  border-color:rgba(124,92,255,.5);
}
.rank-pos{ font-weight:700; color:var(--primary-2); font-size:.82rem; }
.rank-name{ color:var(--text); font-weight:600; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.rank-score{ color:var(--text); font-family:'Space Grotesk',sans-serif; font-size:.85rem; }
.rank-time{ color:var(--text-dim); font-size:.78rem; }
.rank-correct{ color:var(--text-dim); font-size:.78rem; }
.rank-empty{ padding:1.25rem; text-align:center; color:var(--text-dim); font-size:.9rem; }
.rank-note{ margin:1rem 0 0; font-size:.8rem; color:var(--muted); text-align:center; line-height:1.6; }

.rank-lookup{
  margin-top:1.5rem; padding-top:1.25rem; border-top:1px solid var(--border); text-align:center;
}
.rank-lookup-title{ margin:0 0 .75rem; font-size:.85rem; color:var(--muted); font-weight:600; }
.rank-lookup-row{ display:flex; gap:.6rem; flex-wrap:wrap; justify-content:center; }
.rank-lookup-row .form-control-join{ flex:1 1 160px; width:auto; min-width:140px; }
.rank-lookup-error{ margin:.75rem 0 0; font-size:.8rem; color:var(--bad); }

/* ---------- responsive ---------- */
@media (max-width:640px){
  .hero{ grid-template-columns:1fr; gap:1.5rem; padding-top:1rem; }
  .hero-copy{ order:2; }
  .hero-art{ order:1; }
  .hero h1{ font-size:2rem; }
  .setup-grid{ grid-template-columns:1fr; }
  .timer{ width:72px; height:72px; }
  .timer-text b{ font-size:1.1rem; }
  .options{ grid-template-columns:1fr; }
  .quiz-actions{ flex-direction:column; align-items:stretch; }
  .btn-primary, .btn-ghost{ width:100%; }
  .score-ring-wrap{ width:170px; height:170px; }
  .score-center b{ font-size:1.8rem; }
  .stats-row{ grid-template-columns:repeat(2,1fr); }
  .review-head{ flex-direction:column; align-items:stretch; gap:.6rem; }
  .review-filters{ justify-content:center; }
  .rank-row{ grid-template-columns:70px 1fr auto; row-gap:.35rem; }
  .rank-time, .rank-correct{ grid-column:2 / -1; justify-self:start; }
  .rank-hero{ flex-direction:column; align-items:stretch; text-align:center; }
  .rank-hero-total{ text-align:center; }
  .rank-lookup-row{ flex-direction:column; }
  .rank-lookup-row .form-control-join{ width:100%; flex:1 1 auto; }
}

@media (max-width:420px){
  .topbar{ flex-wrap:wrap; gap:.4rem; }
  .brand{ gap:.5rem; }
  .brand-text{ font-size:1rem; }
  .topbar-actions{ gap:.35rem; }
  .chip{ padding:.3rem .55rem; font-size:.76rem; }
  .brand-mark{ width:30px; height:30px; }
  .brand-mark svg{ width:14px; height:14px; }
  .hero h1{ font-size:1.75rem; }
  .setup-panel{ padding:1.2rem 1.15rem; }
  .seg{ padding:.7rem .4rem; font-size:.82rem; }
  .seg b{ font-size:.9rem; }
  .records{ flex-direction:column; align-items:stretch; gap:.75rem; }
  .record{ justify-content:space-between; }
  .question-card{ padding:1.2rem 1.15rem; }
  .q-text{ font-size:1.2rem; }
  .option{ padding:.95rem .95rem .95rem .95rem; }
  .join-info{ padding:.85rem .9rem; }
  .join-info-row{ font-size:.85rem; }
}