/* ============================================================================
   finance-lab.css — styling for the Finance interactive widgets.

   Portable across the self-contained "island" chapter pages: it reads each
   host page's own design tokens (--card, --ink, --accent, --hairline, --radius,
   --ease, fonts) through local fallback variables, so a widget automatically
   takes on the page's accent (indigo in Fundamental, amber in Technical) and
   flips correctly in that page's dark theme. No raw brand colors of its own.
   ========================================================================== */

.fin-widget {
  --fl-up:     var(--add,  oklch(55% 0.12 150));
  --fl-down:   var(--flag, oklch(56% 0.16 25));
  --fl-line:   var(--hairline, oklch(86% 0.018 78));
  --fl-card:   var(--card, oklch(98.4% 0.010 88));
  --fl-panel:  var(--paper-2, oklch(93.8% 0.019 82));
  --fl-ink:    var(--ink, oklch(27% 0.022 55));
  --fl-soft:   var(--ink-soft, oklch(43% 0.024 52));
  --fl-faint:  var(--ink-faint, oklch(57% 0.022 58));
  --fl-accent: var(--accent, oklch(47% 0.13 265));
  --fl-r:  var(--radius, 8px);
  --fl-rs: var(--radius-sm, 5px);
  --fl-ease: var(--ease, cubic-bezier(0.22, 0.61, 0.36, 1));
  --fl-mono: var(--font-mono, ui-monospace, 'SFMono-Regular', Menlo, monospace);
  --fl-body: var(--font-body, ui-serif, Georgia, serif);
  --fl-disp: var(--font-display, ui-serif, Georgia, serif);

  display: block;
  margin: 1.6rem 0;
  border: 1px solid var(--fl-line);
  border-radius: var(--fl-r);
  background: var(--fl-card);
  padding: clamp(0.9rem, 2.5vw, 1.4rem);
  color: var(--fl-ink);
  font-family: var(--fl-body);
}
.fin-widget * { box-sizing: border-box; }

/* ── headings & meta ──────────────────────────────────────────────────── */
.fin-head {
  font-family: var(--fl-disp);
  font-size: 1.18rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 0.7rem;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.fin-kicker {
  font-family: var(--fl-mono);
  font-size: 0.62rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fl-accent);
  border: 1px solid color-mix(in oklch, var(--fl-accent) 40%, transparent);
  border-radius: 999px;
  padding: 0.12rem 0.5rem;
}
.fin-sub {
  font-family: var(--fl-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fl-faint);
  margin-bottom: 0.45rem;
}
.fin-meta { font-size: 0.9rem; color: var(--fl-soft); margin-bottom: 0.7rem; }
.fin-src { display: block; font-family: var(--fl-mono); font-size: 0.68rem; color: var(--fl-faint); margin-top: 0.2rem; line-height: 1.5; }
.fin-note { font-size: 0.86rem; color: var(--fl-soft); line-height: 1.6; margin: 0.6rem 0 0; }
.fin-read {
  font-size: 0.92rem; line-height: 1.62; color: var(--fl-ink);
  margin-top: 0.9rem; padding: 0.7rem 0.85rem;
  border-left: 2px solid var(--fl-accent);
  background: color-mix(in oklch, var(--fl-accent) 6%, transparent);
  border-radius: 0 var(--fl-rs) var(--fl-rs) 0;
}
.fin-legend { font-size: 0.8rem; color: var(--fl-faint); line-height: 1.55; margin: 0.55rem 0 0; }

.fin-badge {
  font-family: var(--fl-mono);
  font-size: 0.6rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.08em;
  padding: 0.1rem 0.4rem; border-radius: 999px; white-space: nowrap;
  vertical-align: middle;
}
.fin-badge.is-real  { color: var(--fl-up);   background: color-mix(in oklch, var(--fl-up) 14%, transparent); }
.fin-badge.is-illus { color: var(--fl-soft); background: color-mix(in oklch, var(--fl-soft) 14%, transparent); }

/* ── preset chips / buttons ───────────────────────────────────────────── */
.fin-chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.8rem; }
.fin-chip, .fin-btn {
  font-family: var(--fl-mono);
  font-size: 0.76rem;
  color: var(--fl-ink);
  background: var(--fl-panel);
  border: 1px solid var(--fl-line);
  border-radius: var(--fl-rs);
  padding: 0.34rem 0.7rem;
  cursor: pointer;
  transition: border-color 0.18s var(--fl-ease), background 0.18s var(--fl-ease), color 0.18s var(--fl-ease);
}
.fin-chip:hover, .fin-btn:hover { border-color: var(--fl-accent); }
.fin-chip[aria-pressed="true"] {
  color: var(--fl-accent);
  border-color: var(--fl-accent);
  background: color-mix(in oklch, var(--fl-accent) 10%, transparent);
}
.fin-btn.primary { color: var(--fl-accent); border-color: color-mix(in oklch, var(--fl-accent) 55%, transparent); }
.fin-controls { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.3rem 0 0.7rem; }

/* ── calculator grid ──────────────────────────────────────────────────── */
.fin-grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(0.9rem, 3vw, 1.6rem); }
@media (max-width: 620px) { .fin-grid2 { grid-template-columns: 1fr; } }

.fin-field { display: flex; flex-direction: column; gap: 0.2rem; margin-bottom: 0.55rem; }
.fin-field-l { font-size: 0.8rem; color: var(--fl-soft); }
.fin-field-in { display: flex; align-items: center; gap: 0.4rem; }
.fin-field input {
  flex: 1; min-width: 0;
  font-family: var(--fl-mono); font-size: 0.9rem;
  color: var(--fl-ink); background: var(--fl-panel);
  border: 1px solid var(--fl-line); border-radius: var(--fl-rs);
  padding: 0.34rem 0.5rem;
}
.fin-field input:focus { outline: none; border-color: var(--fl-accent); }
.fin-unit { font-family: var(--fl-mono); font-size: 0.72rem; color: var(--fl-faint); white-space: nowrap; }

.fin-out {
  display: flex; align-items: baseline; justify-content: space-between; gap: 0.6rem;
  padding: 0.4rem 0; border-bottom: 1px solid color-mix(in oklch, var(--fl-line) 60%, transparent);
}
.fin-out-l { font-size: 0.82rem; color: var(--fl-soft); display: flex; flex-direction: column; }
.fin-out-h { font-size: 0.66rem; color: var(--fl-faint); font-family: var(--fl-mono); }
.fin-out-v { font-family: var(--fl-mono); font-size: 1.02rem; font-weight: 600; color: var(--fl-ink); }

.fin-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.75rem; }
.fin-tag {
  font-family: var(--fl-mono); font-size: 0.68rem;
  padding: 0.18rem 0.5rem; border-radius: 999px;
  border: 1px solid transparent;
}
.fin-tag.ok { color: var(--fl-up);   background: color-mix(in oklch, var(--fl-up) 12%, transparent); }
.fin-tag.no { color: var(--fl-down); background: color-mix(in oklch, var(--fl-down) 12%, transparent); }

/* ── comparison table ─────────────────────────────────────────────────── */
.fin-tablewrap { overflow-x: auto; }
.fin-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; min-width: 480px; }
.fin-table th, .fin-table td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--fl-line); vertical-align: top; }
.fin-table th { font-family: var(--fl-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--fl-faint); font-weight: 500; }
.fin-th-note { width: 42%; }
.fin-metric { color: var(--fl-soft); }
.fin-cell { font-family: var(--fl-mono); font-weight: 600; color: var(--fl-ink); white-space: nowrap; }
.fin-cell.win { background: color-mix(in oklch, var(--fl-accent) 12%, transparent); border-radius: var(--fl-rs); }
.fin-insight { font-size: 0.78rem; color: var(--fl-faint); line-height: 1.5; }

/* ── chart ────────────────────────────────────────────────────────────── */
.fin-chart-wrap { overflow-x: auto; border: 1px solid var(--fl-line); border-radius: var(--fl-rs); background: var(--fl-panel); padding: 0.4rem; }
.fin-chart-svg { display: block; width: 100%; height: auto; min-width: 320px; }
.fin-gridline { stroke: var(--fl-line); stroke-width: 1; opacity: 0.5; }
.fin-axis-lb { fill: var(--fl-faint); font-family: var(--fl-mono); font-size: 9px; }
.fin-pattern-band { fill: color-mix(in oklch, var(--fl-accent) 12%, transparent); }
.fin-ma-line { fill: none; stroke: var(--fl-accent); stroke-width: 1.6; stroke-linejoin: round; opacity: 0.85; }
.fin-marker { fill: var(--fl-accent); }
.fin-candle.up   .fin-body { fill: var(--fl-up);   }
.fin-candle.up   .fin-wick { stroke: var(--fl-up);   stroke-width: 1.2; }
.fin-candle.down .fin-body { fill: var(--fl-down); }
.fin-candle.down .fin-wick { stroke: var(--fl-down); stroke-width: 1.2; }
.fin-hidden { opacity: 0; }
.fin-pop { animation: fin-pop 0.42s var(--fl-ease); }
@keyframes fin-pop { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .fin-pop { animation: none; } }

/* ── pattern quiz ─────────────────────────────────────────────────────── */
.fin-quiz-prompt { font-size: 0.92rem; line-height: 1.6; color: var(--fl-soft); margin: 0.2rem 0 0.75rem; }
.fin-quiz-result { margin-top: 0.85rem; }
.fin-quiz-mark { font-family: var(--fl-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.3rem; }
.fin-quiz-mark.ok { color: var(--fl-up); }
.fin-quiz-mark.no { color: var(--fl-down); }
.fin-quiz-verdict { font-family: var(--fl-disp); font-size: 1.05rem; font-weight: 600; }
.fin-quiz-verdict.up   { color: var(--fl-up); }
.fin-quiz-verdict.down { color: var(--fl-down); }
.fin-quiz-final { font-size: 0.9rem; line-height: 1.62; color: var(--fl-ink); margin-top: 0.7rem; padding-top: 0.7rem; border-top: 1px solid var(--fl-line); }
.fin-quiz-progress { font-family: var(--fl-mono); font-size: 0.7rem; color: var(--fl-faint); margin-top: 0.6rem; }

/* ── graceful-degradation fallback (shown only when JS is off/broken) ──── */
.fin-fallback { font-size: 0.9rem; color: var(--fl-soft); line-height: 1.6; }
.fin-fallback table { width: 100%; border-collapse: collapse; margin: 0.5rem 0; }
.fin-fallback th, .fin-fallback td { text-align: left; padding: 0.35rem 0.5rem; border-bottom: 1px solid var(--fl-line); font-size: 0.84rem; }
.fin-fallback .fin-fallback-tag { font-family: var(--fl-mono); font-size: 0.66rem; color: var(--fl-faint); }