/* exam-shared.css — shared styles for both exam pages */
:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --surface2: #1a1a24;
  --border: rgba(255,255,255,0.07);
  --border2: rgba(255,255,255,0.14);
  --text: #f0ede8;
  --muted: #7a7890;
  --accent: #c8a97e;
  --accent2: #7e9cc8;
  --green: #6dbf8f;
  --red: #bf6d6d;
  --amber: #c8a040;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  font-weight: 300;
  line-height: 1.6;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

/* NAV */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem max(1.25rem, env(safe-area-inset-right)) 1rem max(1.25rem, env(safe-area-inset-left));
  padding-top: max(1rem, env(safe-area-inset-top));
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,15,0.95);
  backdrop-filter: blur(16px);
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-logo {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-decoration: none;
}

.nav-back {
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}
.nav-back:hover { color: var(--text); }

/* MAIN */
main {
  max-width: 820px;
  margin: 0 auto;
  padding: 2rem max(1.25rem, env(safe-area-inset-right)) max(4rem, env(safe-area-inset-bottom)) max(1.25rem, env(safe-area-inset-left));
}

/* INTRO CARD */
.intro-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3rem 2.5rem;
  text-align: center;
  margin-top: 1rem;
}

.intro-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(200,169,126,0.1);
  border: 1px solid rgba(200,169,126,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--accent);
}

.intro-card h1 {
  font-family: 'DM Serif Display', serif;
  font-size: 2rem;
  margin-bottom: 0.5rem;
  font-weight: 400;
}

.intro-card .subtitle {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 2rem;
}

.rules-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.25rem 1.5rem;
  margin: 0 auto 2rem;
  max-width: 440px;
  text-align: left;
}

.rule-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.rule-row:last-child { border-bottom: none; }
.rule-label { color: var(--muted); }
.rule-val { font-family: 'DM Mono', monospace; font-size: 12px; color: var(--text); }

.btn-start {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #0a0a0f;
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 500;
  padding: 13px 32px;
  border-radius: 2px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn-start:hover { opacity: 0.85; }

/* TIMER BAR */
.timer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-bottom: 1rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.timer-left { display: flex; align-items: center; gap: 20px; }

.t-label { font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; font-family: 'DM Mono', monospace; }
.t-val { font-size: 20px; font-weight: 500; font-family: 'DM Mono', monospace; color: var(--text); font-variant-numeric: tabular-nums; }
.t-val.warn { color: var(--amber); }
.t-val.danger { color: var(--red); animation: blink 1s ease infinite; }

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.5} }

.pbar-wrap { display: flex; align-items: center; gap: 10px; }
.pbar-bg { width: 120px; height: 3px; background: var(--border2); border-radius: 2px; overflow: hidden; }
.pbar-fill { height: 100%; border-radius: 2px; background: var(--accent); transition: width 1s linear; }
.pbar-fill.warn { background: var(--amber); }
.pbar-fill.danger { background: var(--red); }

/* Q-NAV GRID */
.qnav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 1rem;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.qn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}

.qn:hover { border-color: var(--border2); color: var(--text); }
.qn.current { border-color: var(--accent); color: var(--accent); background: rgba(200,169,126,0.08); }
.qn.answered { background: var(--surface2); color: var(--text); border-color: var(--border2); }
.qn.correct-nav { background: rgba(109,191,143,0.12); border-color: rgba(109,191,143,0.4); color: var(--green); }
.qn.wrong-nav { background: rgba(191,109,109,0.12); border-color: rgba(191,109,109,0.4); color: var(--red); }
.qn.flagged-nav { border-color: var(--amber); color: var(--amber); background: rgba(200,160,64,0.08); }

/* Q-CARD */
.q-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.75rem;
}

.q-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.scenario-pill {
  display: inline-block;
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 2px;
  margin-bottom: 6px;
}

.sp-1 { background: rgba(109,191,143,0.1); color: #6dbf8f; border: 1px solid rgba(109,191,143,0.2); }
.sp-2 { background: rgba(126,156,200,0.1); color: #7e9cc8; border: 1px solid rgba(126,156,200,0.2); }
.sp-3 { background: rgba(200,169,126,0.1); color: #c8a97e; border: 1px solid rgba(200,169,126,0.2); }
.sp-4 { background: rgba(191,109,109,0.1); color: #bf6d6d; border: 1px solid rgba(191,109,109,0.2); }
.sp-5 { background: rgba(200,160,64,0.1); color: #c8a040; border: 1px solid rgba(200,160,64,0.2); }
.sp-6 { background: rgba(150,120,200,0.1); color: #9678c8; border: 1px solid rgba(150,120,200,0.2); }

.q-meta { font-size: 11px; color: var(--muted); font-family: 'DM Mono', monospace; }

.flag-btn {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.flag-btn:hover { border-color: var(--border2); color: var(--text); }
.flag-btn.flagged { border-color: var(--amber); color: var(--amber); background: rgba(200,160,64,0.08); }

.q-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.q-text code {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  padding: 1px 6px;
  border-radius: 2px;
  color: var(--accent);
}

/* OPTIONS */
.opts { display: flex; flex-direction: column; gap: 6px; }

.opt {
  width: 100%;
  text-align: left;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 11px 14px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
  line-height: 1.55;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-family: 'Outfit', sans-serif;
  font-weight: 300;
  transition: border-color 0.15s, background 0.15s;
}
.opt:hover:not(:disabled) { border-color: var(--border2); background: var(--surface2); }
.opt:disabled { cursor: default; }

.opt-letter {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  min-width: 16px;
  margin-top: 2px;
  flex-shrink: 0;
}

.opt.sel { border-color: rgba(126,156,200,0.5); background: rgba(126,156,200,0.07); }
.opt.sel .opt-letter { color: var(--accent2); }

.opt.correct { border-color: rgba(109,191,143,0.5); background: rgba(109,191,143,0.07); }
.opt.correct .opt-letter { color: var(--green); }

.opt.wrong { border-color: rgba(191,109,109,0.5); background: rgba(191,109,109,0.07); }
.opt.wrong .opt-letter { color: var(--red); }

.opt code {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  padding: 0 5px;
  border-radius: 2px;
  color: var(--accent);
}

/* EXPLANATION */
.exp {
  margin-top: 1rem;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 2px solid var(--green);
  border-radius: 2px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.65;
  display: none;
}
.exp.show { display: block; }
.exp.bad { border-left-color: var(--red); }
.exp-hdr { font-family: 'DM Mono', monospace; font-size: 10px; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 6px; color: var(--text); }

/* NAV ROW */
.nav-row {
  display: flex;
  gap: 8px;
  margin-top: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  padding: 9px 18px;
  border-radius: 2px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}
.btn:hover { background: var(--surface2); }
.btn:disabled { opacity: 0.35; cursor: default; }

.btn-submit-ans {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0a0f;
  font-weight: 500;
}
.btn-submit-ans:hover { opacity: 0.85; background: var(--accent); }

.btn-end {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
  font-weight: 500;
  font-size: 12px;
  padding: 8px 16px;
}
.btn-end:hover { opacity: 0.85; background: var(--red); }

.skip-link {
  font-size: 12px;
  color: var(--muted);
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Outfit', sans-serif;
  text-decoration: underline;
  padding: 0;
}
.skip-link:hover { color: var(--text); }

/* RESULTS */
.score-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.score-cell {
  background: var(--surface);
  padding: 1.25rem;
  text-align: center;
}

.score-num {
  font-family: 'DM Serif Display', serif;
  font-size: 2.5rem;
  display: block;
  line-height: 1;
  margin-bottom: 6px;
}

.score-lbl {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: 'DM Mono', monospace;
}

.domain-breakdown { margin-bottom: 1.5rem; }

.db-header {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 10px;
  padding: 0 0 8px;
  border-bottom: 1px solid var(--border);
}

.db-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}
.db-row:last-child { border-bottom: none; }

.db-label { flex: 1; color: var(--text); }
.db-bar-bg { width: 100px; height: 3px; background: var(--border2); border-radius: 2px; overflow: hidden; flex-shrink: 0; }
.db-bar { height: 100%; border-radius: 2px; }
.db-pct { font-family: 'DM Mono', monospace; font-size: 11px; color: var(--muted); min-width: 50px; text-align: right; }

.review-section { margin-bottom: 1.5rem; }

.review-item {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  align-items: flex-start;
}
.review-item:last-child { border-bottom: none; }

.ri { min-width: 16px; font-size: 13px; }
.ri-correct { color: var(--green); }
.ri-wrong { color: var(--red); }
.ri-skip { color: var(--muted); }

.ri-body { flex: 1; }
.ri-meta { font-family: 'DM Mono', monospace; font-size: 10px; color: var(--muted); margin-bottom: 3px; }
.ri-q { color: var(--text); line-height: 1.5; }
.ri-correction { font-size: 11px; color: var(--red); margin-top: 3px; }
.ri-ok { font-size: 11px; color: var(--green); margin-top: 3px; }

.timed-out {
  background: rgba(191,109,109,0.1);
  border: 1px solid rgba(191,109,109,0.3);
  border-radius: 4px;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--red);
  margin-bottom: 1rem;
  font-family: 'DM Mono', monospace;
}

.restart-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: 2px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  cursor: pointer;
  margin-top: 1.5rem;
  transition: background 0.15s;
}
.restart-btn:hover { background: var(--surface2); }

/* ---- Mobile / narrow viewports ---- */
@media (max-width: 640px) {
  nav {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-disclaimer-wrap {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.5rem 0.75rem;
  }

  .intro-card {
    padding: 2rem 1.25rem;
  }

  .timer-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .timer-left {
    flex-wrap: wrap;
    justify-content: space-between;
    width: 100%;
  }

  .pbar-wrap {
    width: 100%;
    justify-content: flex-end;
  }

  .pbar-bg {
    flex: 1;
    min-width: 60px;
    max-width: 100%;
  }

  .q-card {
    padding: 1.25rem 1rem;
  }

  .q-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .flag-btn {
    align-self: flex-start;
  }

  .q-text {
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .opt {
    padding: 12px 12px;
    min-height: 44px;
  }

  .db-row {
    flex-wrap: wrap;
    gap: 8px;
  }

  .db-label {
    flex: 1 1 100%;
  }

  .db-bar-bg {
    flex: 1;
    min-width: 0;
    width: auto;
    max-width: 100%;
  }

  .db-pct {
    flex: 0 0 auto;
    text-align: left;
  }

  .score-grid {
    grid-template-columns: 1fr 1fr;
  }

  .qn {
    width: 26px;
    height: 26px;
    font-size: 9px;
  }
}

@media (max-width: 380px) {
  a.nav-github {
    font-size: 0;
    gap: 0;
    padding: 6px;
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
  }

  a.nav-github svg {
    width: 18px;
    height: 18px;
  }
}