:root {
  --brand: #4c1d95;
  --brand-2: #6d28d9;
  --accent: #7c3aed;
  --bg: #f5f4fa;
  --card: #ffffff;
  --text: #1e1b2e;
  --muted: #6b6880;
  --border: #e5e2f0;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --blue: #2563eb;
  --radius: 12px;
  --shadow: 0 2px 10px rgba(30, 27, 46, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }

/* ---------- Header ---------- */
.site-header {
  background: linear-gradient(120deg, var(--brand) 0%, var(--brand-2) 100%);
  color: #fff;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow);
}
.site-header .logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.site-header .logo span { color: #c4b5fd; }
.site-header nav { margin-inline-start: auto; display: flex; gap: 1.2rem; font-size: 0.95rem; }
.site-header nav a { opacity: 0.85; }
.site-header nav a:hover, .site-header nav a.active { opacity: 1; text-decoration: underline; text-underline-offset: 5px; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(120deg, var(--brand) 0%, var(--accent) 100%);
  color: #fff;
  text-align: center;
  padding: 3.2rem 1.5rem 3.6rem;
}
.hero h1 { font-size: 2.1rem; margin-bottom: 0.6rem; }
.hero p { font-size: 1.1rem; opacity: 0.92; max-width: 640px; margin: 0 auto; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 2rem 1.5rem; flex: 1; }
.section-title { text-align: center; margin: 0.5rem 0 1.8rem; color: var(--brand); font-size: 1.5rem; }

/* ---------- Cert cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.3rem; }
.cert-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.cert-card:hover { transform: translateY(-3px); box-shadow: 0 6px 18px rgba(30,27,46,0.14); }
.cert-badge {
  width: 64px; height: 64px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 0.85rem;
  background: radial-gradient(circle at 30% 30%, var(--accent), var(--brand));
  border: 3px solid #ede9fe;
}
.cert-card h3 { font-size: 1.1rem; }
.cert-card .org { color: var(--muted); font-size: 0.85rem; }
.cert-card p { font-size: 0.92rem; color: var(--muted); flex: 1; }
.cert-card .cta {
  align-self: flex-start;
  background: var(--brand-2); color: #fff;
  padding: 0.5rem 1.1rem; border-radius: 8px; font-size: 0.9rem; font-weight: 600;
}
.cert-card .cta:hover { background: var(--accent); }
.badge-soon { background: var(--amber); color:#fff; font-size: 0.75rem; padding: 0.15rem 0.6rem; border-radius: 999px; align-self: flex-start; }

/* ---------- Exam list ---------- */
.exam-list { display: flex; flex-direction: column; gap: 0.9rem; max-width: 760px; margin: 0 auto; }
.exam-item {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.1rem 1.4rem;
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.exam-item .exam-name { font-weight: 600; font-size: 1.02rem; }
.exam-item .exam-meta { color: var(--muted); font-size: 0.85rem; }
.exam-item .spacer { flex: 1; }
.exam-item .btn { white-space: nowrap; }

.disclaimer {
  margin-top: 2.5rem; padding: 1rem 1.2rem; border-inline-start: 4px solid var(--accent);
  background: #ede9fe; border-radius: 8px; font-size: 0.82rem; color: #4c1d95;
  max-width: 760px; margin-inline: auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; border: none; cursor: pointer; font-family: inherit;
  background: var(--brand-2); color: #fff; font-weight: 600; font-size: 0.95rem;
  padding: 0.6rem 1.4rem; border-radius: 8px;
}
.btn:hover { background: var(--accent); }
.btn.secondary { background: #fff; color: var(--brand-2); border: 1.5px solid var(--brand-2); }
.btn.secondary:hover { background: #f3efff; }
.btn.danger { background: var(--red); }
.btn.danger:hover { background: #b91c1c; }
.btn.ghost { background: transparent; color: var(--muted); border: 1.5px solid var(--border); }
.btn.ghost:hover { color: var(--text); border-color: var(--muted); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* ---------- Exam info screen ---------- */
.exam-shell { max-width: 900px; margin: 0 auto; }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 1.6rem; }
.stat-box {
  background: var(--blue); color: #fff; text-align: center;
  border-radius: 10px; padding: 1.3rem 0.5rem; box-shadow: var(--shadow);
}
.stat-box .num { font-size: 1.9rem; font-weight: 700; }
.stat-box .label { font-size: 0.9rem; opacity: 0.92; }
.instructions { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.3rem 1.6rem; box-shadow: var(--shadow); }
.instructions h3 { margin-bottom: 0.6rem; }
.instructions ol { padding-inline-start: 1.4rem; display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.95rem; }
.info-actions { margin-top: 1.4rem; display: flex; gap: 0.8rem; flex-wrap: wrap; }

.history { margin-top: 2rem; }
.history h3 { margin-bottom: 0.6rem; font-size: 1.05rem; }
.history table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); font-size: 0.9rem; }
.history th, .history td { padding: 0.6rem 0.9rem; text-align: start; border-bottom: 1px solid var(--border); }
.history th { background: #ede9fe; color: var(--brand); }
.history .pass { color: var(--green); font-weight: 700; }
.history .fail { color: var(--red); font-weight: 700; }

/* ---------- Player ---------- */
.player-top {
  position: sticky; top: 0; z-index: 10;
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 0.7rem 1.2rem; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  box-shadow: var(--shadow);
}
.progress-wrap { flex: 1 1 200px; height: 10px; background: var(--border); border-radius: 999px; overflow: hidden; min-width: 140px; }
.progress-bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--brand-2), var(--accent)); transition: width 0.25s ease; }
.timer { font-weight: 700; font-variant-numeric: tabular-nums; font-size: 1.05rem; color: var(--brand); }
.timer.low { color: var(--red); }
.timer.over { color: var(--red); animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: 0.45; } }
.qcount { color: var(--muted); font-size: 0.9rem; white-space: nowrap; }

.player-grid { display: grid; grid-template-columns: 1fr 230px; gap: 1.4rem; align-items: start; }
@media (max-width: 820px) { .player-grid { grid-template-columns: 1fr; } .palette-card { order: 2; } }

.question-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.5rem 1.7rem; }
.domain-tag { display: inline-block; background: #ede9fe; color: var(--brand); font-size: 0.78rem; font-weight: 600; padding: 0.2rem 0.7rem; border-radius: 999px; margin-bottom: 0.8rem; }
.stem { font-size: 1.05rem; font-weight: 600; margin-bottom: 1.2rem; white-space: pre-wrap; }
.choices { display: flex; flex-direction: column; gap: 0.6rem; }
.choice {
  display: flex; gap: 0.7rem; align-items: flex-start;
  border: 1.5px solid var(--border); border-radius: 10px;
  padding: 0.75rem 0.95rem; cursor: pointer; background: #fff;
  transition: border-color 0.12s ease, background 0.12s ease;
  font-size: 0.97rem;
}
.choice:hover { border-color: var(--accent); background: #faf8ff; }
.choice.selected { border-color: var(--brand-2); background: #ede9fe; }
.choice .letter {
  flex: none; width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--muted); font-weight: 700; font-size: 0.85rem; color: var(--muted);
}
.choice.selected .letter { background: var(--brand-2); border-color: var(--brand-2); color: #fff; }

.q-actions { display: flex; gap: 0.6rem; margin-top: 1.3rem; flex-wrap: wrap; }
.q-actions .spacer { flex: 1; }
.mark-btn.marked { background: var(--amber); color: #fff; border-color: var(--amber); }

.palette-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1rem; }
.palette-card h4 { font-size: 0.9rem; margin-bottom: 0.7rem; color: var(--muted); }
.palette { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.4rem; }
.pal-btn {
  aspect-ratio: 1; border-radius: 8px; border: 1.5px solid var(--border);
  background: #fff; cursor: pointer; font-weight: 600; font-size: 0.82rem; color: var(--muted);
  font-family: inherit;
}
.pal-btn.answered { background: var(--green); border-color: var(--green); color: #fff; }
.pal-btn.marked { background: var(--amber); border-color: var(--amber); color: #fff; }
.pal-btn.current { outline: 3px solid var(--brand-2); outline-offset: 1px; }
.legend { display: flex; flex-direction: column; gap: 0.3rem; margin-top: 0.9rem; font-size: 0.78rem; color: var(--muted); }
.legend .dot { display: inline-block; width: 12px; height: 12px; border-radius: 4px; margin-inline-end: 6px; vertical-align: -1px; border: 1px solid var(--border); }
.dot.green { background: var(--green); } .dot.amber { background: var(--amber); } .dot.white { background: #fff; }

/* ---------- Results ---------- */
.result-hero { text-align: center; padding: 2rem 1rem 1rem; }
.score-ring {
  width: 150px; height: 150px; border-radius: 50%; margin: 0 auto 1rem;
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  color: #fff; box-shadow: var(--shadow);
}
.score-ring.pass { background: radial-gradient(circle at 30% 30%, #22c55e, #15803d); }
.score-ring.fail { background: radial-gradient(circle at 30% 30%, #f87171, #b91c1c); }
.score-ring .pct { font-size: 2.2rem; font-weight: 800; }
.score-ring .verdict { font-size: 0.95rem; font-weight: 600; opacity: 0.95; }
.result-sub { color: var(--muted); margin-bottom: 1.4rem; }

.domain-table { width: 100%; max-width: 640px; margin: 0 auto 2rem; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); font-size: 0.92rem; }
.domain-table th, .domain-table td { padding: 0.65rem 0.9rem; border-bottom: 1px solid var(--border); text-align: start; }
.domain-table th { background: #ede9fe; color: var(--brand); }
.bar-cell { min-width: 130px; }
.mini-bar { height: 8px; border-radius: 999px; background: var(--border); overflow: hidden; }
.mini-bar > div { height: 100%; background: var(--brand-2); }

.review-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.3rem 1.5rem; margin-bottom: 1rem; }
.review-card .stem { font-size: 0.98rem; }
.review-choice { display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.5rem 0.8rem; border-radius: 8px; font-size: 0.92rem; margin-bottom: 0.35rem; border: 1.5px solid transparent; }
.review-choice.correct { background: #dcfce7; border-color: #86efac; }
.review-choice.wrong { background: #fee2e2; border-color: #fca5a5; }
.review-choice .letter { font-weight: 700; flex: none; }
.explanation { margin-top: 0.8rem; background: #f0f9ff; border-inline-start: 4px solid var(--blue); border-radius: 8px; padding: 0.8rem 1rem; font-size: 0.9rem; }
.explanation strong { color: var(--blue); }
.review-status { font-size: 0.8rem; font-weight: 700; padding: 0.15rem 0.6rem; border-radius: 999px; }
.review-status.ok { background: #dcfce7; color: var(--green); }
.review-status.bad { background: #fee2e2; color: var(--red); }
.review-status.skip { background: #fef3c7; color: var(--amber); }

/* ---------- Footer ---------- */
.site-footer { background: #1e1b2e; color: #a5a1b8; text-align: center; padding: 1.2rem; font-size: 0.82rem; margin-top: 2rem; }

.hidden { display: none !important; }
.crumb { color: var(--muted); font-size: 0.88rem; margin-bottom: 1.2rem; }
.crumb a { color: var(--brand-2); font-weight: 600; }

/* ---------- Language ---------- */
.lang-toggle {
  background: rgba(255,255,255,0.15); color: #fff; border: 1.5px solid rgba(255,255,255,0.5);
  border-radius: 999px; padding: 0.25rem 0.9rem; font-family: inherit; font-size: 0.85rem;
  font-weight: 600; cursor: pointer;
}
.lang-toggle:hover { background: rgba(255,255,255,0.28); }

.q-toolbar { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 0.8rem; }
.q-toolbar .domain-tag { margin-bottom: 0; }
.q-lang-btn { padding: 0.25rem 0.8rem; font-size: 0.82rem; margin-inline-start: auto; }
.qlang-badge {
  font-size: 0.75rem; color: var(--muted); background: #f1f0f7;
  padding: 0.15rem 0.6rem; border-radius: 999px;
}

.section-heading {
  color: #fff; background: linear-gradient(120deg, var(--brand), var(--brand-2));
  font-size: 1.15rem; padding: 0.7rem 1.2rem; border-radius: 10px;
  max-width: 760px; margin: 2.2rem auto 0.6rem; box-shadow: var(--shadow);
}

.domain-heading {
  color: var(--brand); font-size: 1.15rem; margin: 1.6rem auto 0.9rem;
  max-width: 760px; padding-bottom: 0.4rem; border-bottom: 2px solid var(--border);
}
.exam-list + .domain-heading { margin-top: 2.2rem; }
.exam-list { margin-bottom: 1rem; }

.source-line { margin-top: 0.5rem; font-size: 0.8rem; color: var(--muted); }

[dir="rtl"] body, [dir="rtl"] .stem { letter-spacing: 0; }