/* LLQP Master — standalone stylesheet for /learn/ static pages.
   Mirrors the main app theme (ink palette + brand accent) without Tailwind. */

:root {
  --ink-950: #0b0f1a;
  --ink-900: #111726;
  --ink-100: #e6eaf2;
  --ink-500: #8b93a7;
  --brand-500: #6366f1;
  --brand-400: #818cf8;
  --gold-400: #fbbf24;
  --mint-400: #34d399;
  --rose-400: #f87171;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-border: rgba(255, 255, 255, 0.08);
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background-color: var(--ink-950);
  background-image:
    radial-gradient(600px 300px at 20% 0%, rgba(99, 102, 241, 0.15), transparent 70%),
    radial-gradient(500px 260px at 85% 10%, rgba(251, 191, 36, 0.07), transparent 70%);
  background-attachment: fixed;
  color: var(--ink-100);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px 64px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.25;
  margin: 1.6em 0 0.5em;
}
h1 { font-size: 2.1rem; margin-top: 0.4em; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.15rem; }

p { margin: 0.9em 0; }

a { color: var(--brand-400); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { padding-left: 1.4em; }
li { margin: 0.35em 0; }

strong { color: var(--ink-100); }

/* Header / breadcrumb bar */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 0 8px;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink-100);
}
.brand:hover { text-decoration: none; color: var(--brand-400); }
.crumbs { font-size: 0.85rem; color: var(--ink-500); }
.crumbs a { color: var(--ink-500); }
.crumbs a:hover { color: var(--brand-400); }

/* Cards */
.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 20px 22px;
  margin: 16px 0;
}
a.card { color: var(--ink-100); }
a.card:hover { text-decoration: none; border-color: rgba(129, 140, 248, 0.5); }
.card h2, .card h3 { margin-top: 0; }
.card p { color: var(--ink-500); margin-bottom: 0; font-size: 0.95rem; }

/* Quiz question / article question blocks */
.question-block {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 22px 24px;
  margin: 24px 0;
}
.question-block .stem { font-weight: 600; margin-top: 0; }
.question-block ol { margin-bottom: 0; }
.answer-line {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--surface-border);
  font-weight: 600;
  color: var(--mint-400);
}
.steps { margin: 8px 0 0; }
.steps p { margin: 0.45em 0; }
.steps .step-label { color: var(--brand-400); font-weight: 600; }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--surface-border);
  vertical-align: top;
}
th { font-family: var(--font-display); color: var(--ink-100); background: rgba(255, 255, 255, 0.05); }
td { color: var(--ink-500); }
td strong { color: var(--ink-100); }

/* Callouts */
.note {
  border-left: 3px solid var(--gold-400);
  background: rgba(251, 191, 36, 0.06);
  border-radius: 0 12px 12px 0;
  padding: 12px 16px;
  margin: 18px 0;
  font-size: 0.95rem;
}
.note p { margin: 0.3em 0; }

/* CTA */
.cta {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 28px 24px;
  margin: 36px 0 8px;
  text-align: center;
}
.cta h2 { margin-top: 0; }
.cta p { color: var(--ink-500); }
.btn {
  display: inline-block;
  background: var(--brand-500);
  color: #fff;
  font-weight: 600;
  border-radius: 12px;
  padding: 12px 26px;
  margin: 8px 6px 0;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
  transition: background 0.15s ease;
}
.btn:hover { background: var(--brand-400); text-decoration: none; }
.btn.secondary {
  background: transparent;
  border: 1px solid var(--surface-border);
  box-shadow: none;
  color: var(--ink-100);
}
.btn.secondary:hover { border-color: var(--brand-400); }

/* Interactive quiz widget */
.quiz-shell {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 26px 26px 30px;
  margin: 24px 0;
}
.quiz-progress {
  font-size: 0.82rem;
  color: var(--ink-500);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.quiz-stem { font-weight: 600; font-size: 1.05rem; margin: 0 0 18px; }
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-option {
  text-align: left;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  color: var(--ink-100);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 16px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.quiz-option:hover:not(:disabled) { border-color: var(--brand-400); }
.quiz-option:disabled { cursor: default; opacity: 0.85; }
.quiz-option.correct {
  border-color: var(--mint-400);
  background: rgba(52, 211, 153, 0.12);
}
.quiz-option.incorrect {
  border-color: var(--rose-400);
  background: rgba(248, 113, 113, 0.12);
}
.quiz-explanation {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--surface-border);
  font-size: 0.95rem;
}
.quiz-explanation .verdict { font-weight: 700; margin-top: 0; }
.quiz-explanation .verdict.good { color: var(--mint-400); }
.quiz-explanation .verdict.bad { color: var(--rose-400); }
.quiz-explanation .opt-fb { color: var(--ink-500); font-size: 0.88rem; margin: 0.3em 0; }
.quiz-next-row { margin-top: 18px; text-align: right; }
.quiz-score {
  text-align: center;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--brand-400);
  margin: 10px 0 4px;
}
.quiz-error {
  text-align: center;
  color: var(--ink-500);
  padding: 30px 10px;
}
.quiz-error .btn { margin-top: 14px; }
.quiz-loading { text-align: center; color: var(--ink-500); padding: 40px 0; }

/* Footer */
.site-footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--surface-border);
  font-size: 0.82rem;
  color: var(--ink-500);
}

@media (max-width: 560px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.25rem; }
  .question-block, .quiz-shell, .cta { padding: 18px 16px; }
  .quiz-score { font-size: 2.4rem; }
  th, td { padding: 8px 8px; font-size: 0.85rem; }
}

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin: 16px 0 32px; }
.grid .card h2 { font-size: 1.05rem; margin-top: 0; }
.glossary-list { columns: 2; line-height: 1.9; }
@media (max-width: 560px) { .glossary-list { columns: 1; } }
@media print {
  body { background: #fff; color: #000; }
  .site-header, .breadcrumbs, .cta-box, footer, .btn { display: none !important; }
  main, article { max-width: 100%; color: #000; }
}