:root {
  --bg: #0f1729;
  --bg-soft: #16203a;
  --card: #1c2742;
  --card-2: #222e4f;
  --line: #2c3a5e;
  --text: #eaf0ff;
  --muted: #93a1c4;
  --primary: #3b82f6;
  --primary-2: #6366f1;
  --accent: #22d3ee;
  --green: #22c55e;
  --green-soft: rgba(34, 197, 94, 0.14);
  --red: #ef4444;
  --red-soft: rgba(239, 68, 68, 0.14);
  --amber: #f59e0b;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --radius: 18px;
}

* { box-sizing: border-box; }

html { overflow-x: hidden; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(99, 102, 241, 0.22), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(34, 211, 238, 0.12), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: "Cairo", "Tajawal", system-ui, -apple-system, "Segoe UI", Tahoma, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body { direction: rtl; }

.wrap {
  width: min(100%, 860px);
  margin: 0 auto;
  padding: 22px 18px 80px;
}

/* Header */
.appbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  min-width: 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand .logo {
  width: 46px; height: 46px;
  border-radius: 13px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 8px 22px rgba(59, 130, 246, 0.45);
  font-size: 24px;
}
.brand h1 {
  font-size: 18px;
  margin: 0;
  line-height: 1.25;
  font-weight: 800;
  overflow-wrap: anywhere;
}
.brand p { margin: 2px 0 0; font-size: 12.5px; color: var(--muted); }

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  font-family: inherit;
  font-weight: 700;
  font-size: 15px;
  padding: 12px 18px;
  border-radius: 13px;
  cursor: pointer;
  min-height: 44px;
  max-width: 100%;
  transition: transform .08s ease, background .15s ease, border-color .15s ease;
  overflow-wrap: anywhere;
}
.btn:hover { background: var(--card-2); }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent;
  box-shadow: 0 12px 28px rgba(59, 130, 246, 0.40);
}
.btn.primary:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; }
.btn.danger { color: #ffd9d9; border-color: rgba(239,68,68,.4); background: rgba(239,68,68,.08); }
.btn.block { width: 100%; }
.btn.lg { padding: 16px 22px; font-size: 17px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.card {
  background: linear-gradient(180deg, var(--card), var(--bg-soft));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

/* Dashboard */
.hero {
  text-align: center;
  padding: 26px 22px 28px;
}
.hero h2 { margin: 0 0 8px; font-size: 24px; }
.hero p { margin: 0 auto 20px; color: var(--muted); max-width: 520px; font-size: 14.5px; line-height: 1.7; }
.hero .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 18px;
}
.stat {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  text-align: center;
  min-width: 0;
}
.stat .num { font-size: 24px; font-weight: 800; }
.stat .lbl { font-size: 12px; color: var(--muted); margin-top: 4px; }
.stat .num.green { color: var(--green); }
.stat .num.blue { color: var(--accent); }
.stat .num.amber { color: var(--amber); }

.section-title { font-size: 15px; color: var(--muted); margin: 22px 4px 10px; font-weight: 700; }

.progress {
  height: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 99px;
  overflow: hidden;
}
.progress > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  border-radius: 99px;
  transition: width .5s ease;
}
.coverage-note { font-size: 13px; color: var(--muted); margin-top: 8px; }
.coverage-note b { color: var(--text); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 11px;
  font-size: 13px;
  color: var(--muted);
  max-width: 100%;
  overflow-wrap: anywhere;
}
.chip b { color: var(--text); }

/* Exam */
.exam-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px; gap: 12px;
  min-width: 0;
}
.exam-head .meta { font-size: 14px; color: var(--muted); font-weight: 700; min-width: 0; }
.exam-head .meta b { color: var(--text); }
.qcount-bar { margin-bottom: 18px; }

.qnum-badge {
  display: inline-block;
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid rgba(34,197,94,.3);
  font-weight: 800; font-size: 13px;
  padding: 5px 12px; border-radius: 99px;
  margin-bottom: 14px;
}
.qtext { font-size: 21px; font-weight: 800; line-height: 1.6; margin: 0 0 18px; overflow-wrap: anywhere; }
.sign-wrap { text-align: center; margin: 6px 0 20px; }
.sign-wrap img {
  width: min(200px, 68vw); height: min(200px, 68vw); object-fit: contain;
  background: #fff; border-radius: 16px; padding: 14px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}

.options { display: flex; flex-direction: column; gap: 12px; }
.opt {
  display: flex; align-items: center; gap: 14px;
  text-align: right;
  width: 100%;
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  font-size: 17px; font-weight: 600;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  transition: border-color .12s ease, background .12s ease, transform .06s ease;
  min-width: 0;
}
.opt:hover:not(.locked) { border-color: var(--primary); background: var(--card-2); }
.opt:active:not(.locked) { transform: scale(.995); }
.opt .marker {
  flex: 0 0 auto;
  width: 30px; height: 30px; border-radius: 9px;
  border: 2px solid var(--line);
  display: grid; place-items: center;
  font-size: 16px; font-weight: 900;
  color: var(--muted);
}
.opt .txt { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.opt.locked { cursor: default; }
.opt.correct {
  border-color: var(--green);
  background: var(--green-soft);
}
.opt.correct .marker { border-color: var(--green); background: var(--green); color: #06210f; }
.opt.wrong {
  border-color: var(--red);
  background: var(--red-soft);
}
.opt.wrong .marker { border-color: var(--red); background: var(--red); color: #2a0707; }
.opt.dim { opacity: .55; }

.exam-foot {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 22px; gap: 12px;
  min-width: 0;
}
.feedback { font-size: 15px; font-weight: 800; overflow-wrap: anywhere; }
.feedback.ok { color: var(--green); }
.feedback.no { color: var(--red); }
.kbd-hint { font-size: 12px; color: var(--muted); }

/* Results */
.result-hero { text-align: center; padding: 16px 10px 6px; }
.score-ring {
  width: 168px; height: 168px; margin: 6px auto 14px;
  border-radius: 50%;
  display: grid; place-items: center;
  position: relative;
}
.score-ring .inner {
  width: 134px; height: 134px; border-radius: 50%;
  background: var(--bg);
  display: grid; place-items: center; flex-direction: column;
}
.score-ring .val { font-size: 40px; font-weight: 900; line-height: 1; }
.score-ring .of { font-size: 14px; color: var(--muted); margin-top: 4px; }
.verdict { font-size: 26px; font-weight: 900; margin: 4px 0; }
.verdict.pass { color: var(--green); }
.verdict.fail { color: var(--red); }
.verdict-sub { color: var(--muted); font-size: 14.5px; margin: 0 0 8px; }

.review-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 15px 16px;
  margin-top: 12px;
  background: var(--card);
  overflow-wrap: anywhere;
}
.review-item::after { content: ""; display: table; clear: both; }
.review-item .rq { font-weight: 800; font-size: 15.5px; margin: 0 0 10px; line-height: 1.6; }
.review-item .ans { font-size: 14px; margin: 6px 0; display: flex; gap: 8px; align-items: flex-start; }
.review-item .ans .tag { font-size: 12px; padding: 2px 8px; border-radius: 7px; font-weight: 800; flex: 0 0 auto; }
.tag.you { background: var(--red-soft); color: #ffb4b4; border: 1px solid rgba(239,68,68,.3); }
.tag.right { background: var(--green-soft); color: #9af0b5; border: 1px solid rgba(34,197,94,.3); }
.review-item .review-sign { width: 88px; height: 88px; object-fit: contain; background:#fff; border-radius:10px; padding:6px; float: left; margin: 0 0 8px 12px; }

.hidden { display: none !important; }

.toast {
  position: fixed; bottom: 20px; right: 50%; transform: translateX(50%);
  background: var(--card-2); border: 1px solid var(--line);
  padding: 12px 18px; border-radius: 12px; box-shadow: var(--shadow);
  font-size: 14px; font-weight: 700; z-index: 50;
  opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease;
}
.toast.show { opacity: 1; transform: translateX(50%) translateY(0); }

.footer-note { text-align: center; color: var(--muted); font-size: 12px; margin-top: 26px; line-height: 1.7; }

@media (max-width: 620px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .qtext { font-size: 19px; }
  .opt { font-size: 16px; padding: 14px 15px; }
  .hero h2 { font-size: 21px; }
  .brand h1 { font-size: 15.5px; }
}

@media (max-width: 480px) {
  .wrap { padding: 14px 12px 64px; }
  .appbar {
    align-items: flex-start;
    gap: 10px;
  }
  .brand .logo {
    width: 40px;
    height: 40px;
    border-radius: 11px;
    font-size: 21px;
  }
  .brand p { font-size: 11.5px; }
  .appbar .btn {
    padding: 9px 12px;
    font-size: 13px;
  }
  .card { padding: 16px; }
  .hero { padding: 20px 16px 22px; }
  .hero p { font-size: 13.5px; line-height: 1.65; }
  .hero .cta,
  #view-result .cta {
    display: grid !important;
    grid-template-columns: 1fr;
    width: 100%;
  }
  .hero .cta .btn,
  #view-result .cta .btn,
  #resetBtn {
    width: 100%;
  }
  .btn.lg {
    padding: 14px 16px;
    font-size: 15.5px;
  }
  .stats { gap: 9px; }
  .stat { padding: 12px 9px; }
  .stat .num { font-size: 21px; }
  .stat .lbl { font-size: 11.5px; }
  .section-title { margin-top: 18px; }
  .chip { padding: 7px 9px; font-size: 12.5px; }
  .exam-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }
  .qcount-bar { margin-bottom: 14px; }
  .qnum-badge { font-size: 12.5px; margin-bottom: 12px; }
  .qtext { font-size: 18px; line-height: 1.55; }
  .sign-wrap img {
    width: min(190px, 76vw);
    height: min(190px, 76vw);
    padding: 12px;
  }
  .options { gap: 10px; }
  .opt {
    align-items: flex-start;
    gap: 10px;
    padding: 13px 12px;
    border-radius: 12px;
  }
  .opt .marker {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    margin-top: 1px;
  }
  .exam-foot {
    align-items: stretch;
    flex-direction: column;
    margin-top: 18px;
  }
  .feedback { font-size: 14px; }
  .kbd-hint { display: none; }
  #nextBtn { width: 100%; }
  .score-ring {
    width: 140px;
    height: 140px;
  }
  .score-ring .inner {
    width: 110px;
    height: 110px;
  }
  .score-ring .val { font-size: 34px; }
  .verdict { font-size: 23px; }
  .review-item {
    padding: 13px 12px;
    border-radius: 12px;
  }
  .review-item .rq { font-size: 14.5px; }
  .review-item .review-sign {
    float: none;
    display: block;
    width: 96px;
    height: 96px;
    margin: 0 auto 10px;
  }
  .toast {
    right: 12px;
    left: 12px;
    transform: none;
    text-align: center;
  }
  .toast.show { transform: none; }
}

@media (max-width: 380px) {
  .wrap { padding-inline: 10px; }
  .brand { gap: 9px; }
  .brand .logo {
    width: 36px;
    height: 36px;
    font-size: 19px;
  }
  .brand h1 { font-size: 14px; }
  .brand p { display: none; }
  .appbar .btn {
    min-height: 38px;
    padding: 7px 10px;
  }
  .card { padding: 14px; }
  .hero h2 { font-size: 19px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat .num { font-size: 20px; }
  .qtext { font-size: 17px; }
  .opt { font-size: 15px; }
}

/* tiny confetti dots for pass */
.confetti { position: fixed; inset: 0; pointer-events: none; overflow: hidden; z-index: 40; }
.confetti i {
  position: absolute; top: -10px; width: 9px; height: 14px; border-radius: 2px;
  animation: fall linear forwards;
}
@keyframes fall {
  to { transform: translateY(105vh) rotate(540deg); opacity: .9; }
}