:root {
  --bg: #111411;
  --card: #1b211c;
  --border: rgba(255,255,255,0.10);
  --text: #f1efe7;
  --muted: #bfc5b4;
  --accent: #f5b84b;
  --accent-soft: rgba(245, 184, 75, 0.14);
  --ink: #10130f;
  --ok: #4ade80;
  --err: #f87171;
  --display: 'Literata', Georgia, serif;
  --body: 'DM Sans', system-ui, sans-serif;
}

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

body {
  font-family: var(--body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(245,184,75,0.08) 1px, transparent 1px),
    linear-gradient(rgba(245,184,75,0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

#app {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}

h1, h2, h3 { font-family: var(--display); font-weight: 700; }

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, #f5b84b, #7fb069);
  color: var(--ink);
  display: grid; place-items: center; font-size: 1.2rem;
}
.logo h1 { font-size: 1.3rem; }
.logo p { font-size: 0.72rem; color: var(--muted); }

.user-badge {
  padding: 8px 14px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border);
  font-size: 0.82rem;
}
.user-badge strong { color: var(--accent); font-family: monospace; }

.nav-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: rgba(232, 237, 244, 0.88);
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-link {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #0f1419; font-weight: 600; }
.btn-primary:hover { filter: brightness(1.08); color: var(--ink); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
}

.hero-title { font-size: clamp(1.8rem, 4vw, 2.4rem); margin-bottom: 10px; }
.hero-sub { color: var(--muted); margin-bottom: 24px; max-width: 480px; }

.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-size: 0.75rem; font-weight: 600;
  color: var(--muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.06em;
}
.form-group input {
  width: 100%; padding: 12px 14px; border-radius: 12px;
  border: 1px solid var(--border); background: #121611;
  color: var(--text); font-family: inherit; font-size: 0.95rem;
}
.hint { font-size: 0.78rem; color: var(--muted); margin-top: 6px; }
.hint.ok { color: var(--ok); }
.hint.err { color: var(--err); }

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}
.stat-box {
  text-align: center; padding: 14px 10px;
  border-radius: 10px; background: #121611; border: 1px solid var(--border);
}
.stat-box strong { display: block; font-size: 1.6rem; color: var(--accent); font-family: var(--display); }
.stat-box span { font-size: 0.72rem; color: var(--muted); }

.chip-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 8px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: #121611;
  font-size: 0.82rem; cursor: pointer; transition: all 0.18s;
  color: var(--text);
}
.chip:hover, .chip.active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }

.q-title { font-size: 0.8rem; color: var(--accent); margin-bottom: 8px; font-weight: 600; }
.q-text {
  font-family: var(--display);
  font-size: clamp(1.2rem, 3vw, 1.55rem);
  line-height: 1.5;
  margin-bottom: 24px;
}

.mode-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 18px; }
.mode-tabs .btn { padding: 8px 14px; font-size: 0.82rem; }
.mode-tabs .btn.active { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.18); color: var(--text); }

.story-lead {
  padding: 16px 18px;
  border-radius: 10px;
  background: rgba(127,176,105,0.10);
  border: 1px solid rgba(127,176,105,0.22);
  margin-bottom: 18px;
}
.story-lead.compact { margin-bottom: 16px; }
.story-lead .story-kicker { font-size: 0.78rem; color: rgba(232,237,244,0.92); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }
.story-lead .story-scene { color: var(--muted); font-size: 0.95rem; line-height: 1.75; }

.fact-panel {
  border: 1px dashed rgba(245,184,75,0.38);
  background: rgba(245,184,75,0.07);
  border-radius: 10px;
  padding: 14px;
  margin: -2px 0 18px;
}
.fact-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 10px;
}
.fact-head small { color: var(--muted); font-weight: 500; }
.fact-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  min-height: 42px;
  border-top: 1px solid rgba(255,255,255,0.08);
  color: var(--muted);
}
.fact-row:first-of-type { border-top: 0; }
.fact-row strong { color: var(--text); font-size: 0.95rem; text-align: right; }
.fact-row.open span { color: var(--text); }
.mini-btn {
  border: 1px solid rgba(245,184,75,0.45);
  background: rgba(245,184,75,0.12);
  color: var(--accent);
  border-radius: 8px;
  padding: 6px 10px;
  font: inherit;
  cursor: pointer;
}

.options { display: grid; gap: 10px; margin-bottom: 20px; }
.option {
  text-align: left;
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #121611;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.18s;
}
.option:hover:not(:disabled) { border-color: var(--accent); }
.option.selected { border-color: var(--accent); background: var(--accent-soft); }
.option.correct { border-color: var(--ok); background: rgba(74,222,128,0.12); }
.option.wrong { border-color: var(--err); background: rgba(248,113,113,0.12); }
.option:disabled { cursor: default; }

.explain {
  padding: 16px 18px;
  border-radius: 10px;
  background: rgba(245,184,75,0.08);
  border: 1px solid rgba(245,184,75,0.24);
  font-size: 0.92rem;
  color: rgba(232,237,244,0.88);
  margin-bottom: 16px;
}
.explain strong { color: var(--text); }
.explain p { margin-top: 8px; }
.source-note { color: var(--muted); font-size: 0.84rem; }

.progress-bar-wrap {
  height: 5px; background: #121611; border-radius: 999px; overflow: hidden; margin-bottom: 20px;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #7fb069);
  transition: width 0.3s;
}

.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--card); border: 1px solid var(--border);
  padding: 12px 22px; border-radius: 999px;
  font-size: 0.85rem; opacity: 0; transition: all 0.3s; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.empty { text-align: center; padding: 48px 20px; color: var(--muted); }

.platform-note {
  font-size: 0.75rem; color: var(--muted);
  margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border);
}