/* ============================================================
   脳の実験室 — Lab-specific styles.
   Built on assets/brain.css tokens (Direction A "Paper & Instrument")
   — swapping the base stylesheet re-themes everything here, since
   every rule below reads a --color-*/--text-*/--font-* custom
   property rather than a hardcoded value. New Direction A-only
   tokens (--accent, --accent-ink, --accent-soft, --ink, --ink-soft,
   --ink-faint, --bg) are read with a kokoro-safe fallback in case
   this ever loads before brain.css.
   Motif: blue accent reserved for MEASURED values (headline number's
   unit-less sibling data — deltas, tier judgments, citation links)
   and primary CTAs, never decoration. Flat paper — no card box
   around the result/tier screens, thin hairline/dashed dividers
   between sections instead. Stimulus area, response buttons, result
   cards, share row.
   ============================================================ */

/* ---------- Header fit at narrow widths (390px) ---------- */
/* Scoped by loading this file only on lab pages — safe to touch the
   shared .page-back/.brand-tag classes here. */
.page-header .page-back { white-space: nowrap; }
@media (max-width: 420px) {
  .page-header .brand-tag { display: none; }
}

/* ---------- Layout spacing helpers (replace one-off inline styles) ---------- */
.lab-h1 { font-size: clamp(30px, 4vw, 46px); margin-bottom: 18px; }
.lab-lead { margin-bottom: 22px; }
.lab-hero--tight { padding-bottom: 8px; }
.lab-section--tight { padding-top: 16px; }
.lab-section--flush { border-top: none; padding-top: 8px; }
.lab-delta--inline { font-family: var(--mono, var(--font-mono)); font-size: 12.5px; color: var(--ink-soft, var(--text-body)); margin: 0; }
.lab-restart-btn { margin-top: 20px; }

/* ---------- Hub ---------- */
.lab-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 8px; }
@media (max-width: 640px) { .lab-grid { grid-template-columns: 1fr; } }
/* "すべてのテストを見る" — used where a page shows a partial card set
   (e.g. the homepage) and links out to the full /lab/ hub. */
.lab-see-all { margin-top: 18px; }

.lab-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius-card);
  padding: 24px 26px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.lab-card.is-ready { border-left: 3px solid var(--accent, var(--color-terracotta)); }
.lab-card.is-ready:hover { transform: translateY(-2px); border-color: var(--accent, var(--color-terracotta)); }
.lab-card.is-soon { opacity: 0.6; cursor: default; }
.lab-card .lab-card-label { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.lab-card h3 { font-size: 19px; margin: 0 0 8px; }
.lab-card p { font-size: 13.5px; color: var(--text-body); margin: 0; line-height: 1.8; }
.lab-card .badge-inline { flex: none; }

.lab-loop {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
@media (max-width: 720px) { .lab-loop { grid-template-columns: 1fr 1fr; } }
.lab-loop li {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 16px 16px;
  font-size: 13px;
  color: var(--text-body);
  line-height: 1.7;
}
.lab-loop li .n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 999px;
  background: var(--accent-soft, var(--color-sage-soft)); color: var(--accent-ink, var(--color-ink));
  font-family: var(--mono, var(--font-mono)); font-size: 12px; font-weight: 600;
  margin-bottom: 8px;
}

.lab-disclaimer {
  margin-top: 28px;
  border-radius: var(--radius-card);
  border: 1px solid var(--card-line);
  background: var(--color-ivory-warm);
  padding: 18px 22px;
  font-size: 13px;
  color: var(--text-body);
  line-height: 1.8;
}

/* ---------- Test intro ---------- */
.lab-intro-list { margin: 0 0 24px; padding-left: 1.2em; font-size: 14.5px; color: var(--text-body); }
.lab-intro-list li { margin-bottom: 6px; }
.lab-start-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin: 8px 0 4px; }

/* ---------- Stage (stimulus area) ---------- */
.lab-stage {
  position: relative;
  min-height: 320px;
  border-radius: var(--radius-card);
  border: 1px solid var(--card-line);
  background: var(--card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 18px;
  padding: 28px;
  touch-action: manipulation;
  user-select: none;
}
.lab-stage:focus-visible { outline: 2px solid var(--accent, var(--color-terracotta)); outline-offset: 4px; }
.lab-stage .lab-stage-hint {
  font-family: var(--mono, var(--font-mono));
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.lab-stage .lab-trial-counter {
  position: absolute;
  top: 18px; left: 20px;
  font-family: var(--mono, var(--font-mono));
  font-size: 12px;
  color: var(--text-muted);
}
/* The tap target itself is the one measured, live event on this
   screen — the accent blue applies here deliberately. */
.lab-dot {
  width: 88px; height: 88px;
  border-radius: 999px;
  background: var(--accent, var(--color-terracotta));
  box-shadow: 0 0 0 10px var(--accent-soft, var(--color-sage-soft));
  transition: transform 120ms var(--ease);
}
@media (prefers-reduced-motion: reduce) { .lab-dot { transition: none; } }
.lab-stage.state-wait .lab-dot { opacity: 0; transform: scale(0.6); }
.lab-stage.state-go .lab-dot { opacity: 1; transform: scale(1); }
.lab-stage .lab-feedback {
  font-family: var(--sans, var(--font-sans));
  font-size: 15px;
  font-weight: 600;
  color: var(--ink, var(--color-ink));
  min-height: 22px;
}
.lab-stage .lab-feedback.is-ok { color: var(--accent-ink, var(--color-sage)); }

/* ---------- Stroop stimulus + buttons ---------- */
.stroop-word {
  font-family: var(--serif, var(--font-serif));
  font-size: clamp(52px, 9vw, 84px);
  font-weight: 700;
  line-height: 1;
}
.stroop-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 480px;
}
@media (max-width: 520px) { .stroop-buttons { grid-template-columns: 1fr 1fr; } }
/* Response colors stay the 4 true hues (red/blue/green/yellow) the
   Stroop task needs — not restyled to the site palette. */
.color-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 56px;
  border-radius: var(--radius-card);
  border: 2px solid transparent;
  font-family: var(--sans, var(--font-sans));
  font-weight: 700;
  font-size: 15px;
  color: #fff;
  cursor: pointer;
  transition: transform var(--dur) var(--ease);
}
.color-btn:hover, .color-btn:focus-visible { transform: translateY(-1px); }
.color-btn .key { font-family: var(--mono, var(--font-mono)); font-size: 11px; opacity: 0.85; }
.color-btn[data-color="red"] { background: #c1443a; }
.color-btn[data-color="blue"] { background: #2f5f9e; }
.color-btn[data-color="green"] { background: #2f7d4f; }
.color-btn[data-color="yellow"] { background: #b98a1e; }
.lab-practice-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono, var(--font-mono));
  font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-muted); background: var(--color-ivory-warm);
  border: 1px solid var(--line);
  padding: 4px 12px; border-radius: 999px;
  margin-bottom: 4px;
}

/* ---------- Result — no outer card box (flat paper, per the
   Direction A result-screen mockup); sections divided by hairlines
   instead of a bordered/shadowed panel. ---------- */
.lab-result { margin-top: 8px; }
.lab-result-card { background: transparent; border: none; border-radius: 0; padding: 0; }
.lab-result-headline { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin: 18px 0 4px; }
.lab-result-headline .num {
  font-family: var(--mono, var(--font-mono));
  font-variant-numeric: tabular-nums;
  font-size: clamp(52px, 13vw, 108px);
  font-weight: 600;
  line-height: 1;
  color: var(--ink, var(--color-ink));
}
.lab-result-headline .unit { font-family: var(--mono, var(--font-mono)); font-size: 18px; color: var(--ink-soft, var(--text-muted)); }

.lab-tier-pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--serif, var(--font-serif));
  font-size: 15px; font-weight: 700; color: var(--accent-ink, var(--color-ink));
  background: var(--accent-soft, var(--color-sage-soft)); padding: 7px 16px; border-radius: 999px;
  margin: 0 0 22px;
}

.lab-stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 0 0 4px; }
@media (max-width: 560px) { .lab-stat-grid { grid-template-columns: 1fr 1fr; } }
.stat-tile {
  border: 1px solid var(--line); border-radius: var(--radius-card); padding: 14px 16px; background: var(--color-ivory-warm);
}
.stat-tile .label { font-size: 11.5px; color: var(--text-muted); margin-bottom: 4px; }
.stat-tile .value { font-family: var(--mono, var(--font-mono)); font-variant-numeric: tabular-nums; font-size: 20px; color: var(--ink, var(--text-strong)); font-weight: 600; }

.lab-delta { font-family: var(--mono, var(--font-mono)); font-size: 13px; color: var(--ink-soft, var(--text-body)); margin: 0 0 18px; }

/* Reference line — grade badge + source note, a bordered row like
   the mockup's .reference-line, not a boxed callout. */
.lab-reference-note {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 13px; color: var(--ink-soft, var(--text-muted));
  padding: 16px 0; border-top: 1px solid var(--line);
  margin: 20px 0 0; line-height: 1.7;
}
.lab-reference-note .grade-badge { flex: none; }

/* Delta row — 前回との差. label / value (accent) / detail, matching
   the Direction A result-screen mockup. --primary is used where
   there is no sourced absolute norm (Stroop) and the delta becomes
   the meaningful comparison, so it gets a highlighted block instead
   of a plain divider row. */
.delta-row {
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  padding: 16px 0; border-top: 1px solid var(--line);
  margin: 0 0 4px;
}
.delta-label { font-size: 13px; color: var(--ink-soft, var(--text-body)); }
.delta-value {
  font-family: var(--mono, var(--font-mono)); font-variant-numeric: tabular-nums;
  font-weight: 600; font-size: 20px; color: var(--accent-ink, var(--color-ink));
}
.delta-detail { font-family: var(--mono, var(--font-mono)); font-size: 12px; color: var(--ink-faint, var(--text-muted)); }
.delta-row--primary {
  border-top: none;
  background: var(--accent-soft, var(--color-sage-soft));
  border-radius: var(--radius-card);
  padding: 14px 18px;
  margin: 4px 0 22px;
}
.delta-row--primary .delta-value { font-size: 24px; }

.lab-sources { margin: 20px 0 4px; font-size: 12.5px; color: var(--text-muted); line-height: 1.8; }
.lab-sources-title { font-family: var(--mono, var(--font-mono)); font-weight: 600; color: var(--text-strong); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 8px; }
.lab-sources ul { margin: 0; padding-left: 1.15em; }
.lab-sources li { margin-bottom: 6px; }
.lab-sources a { color: var(--accent-ink, var(--color-terracotta)); text-decoration: underline; text-underline-offset: 2px; }

/* ---------- Share row — outline by default, ink-filled for the
   primary action, both inverting on hover (mockup .share-btn). ---------- */
.lab-share-row { display: flex; gap: 10px; flex-wrap: wrap; margin: 26px 0 4px; }
.btn-share {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; color: var(--ink, var(--color-ink));
  border: 1px solid var(--ink, var(--color-ink)); border-radius: 999px; padding: 11px 18px;
  background: transparent; cursor: pointer; font-family: var(--sans, var(--font-sans));
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.btn-share:hover { background: var(--ink, var(--color-ink)); color: var(--bg, var(--color-ivory)); }
.btn-share--primary { background: var(--ink, var(--color-ink)); color: var(--bg, var(--color-ivory)); }
.btn-share--primary:hover { background: var(--accent-ink, var(--color-terracotta-hover)); border-color: var(--accent-ink, var(--color-terracotta-hover)); }
.btn-share[data-copied="true"] { border-color: var(--accent, var(--color-sage)); color: var(--accent-ink, var(--color-sage)); background: var(--accent-soft, transparent); }

.lab-result-note {
  font-size: 11.5px; color: var(--ink-faint, var(--text-muted)); margin: 0 0 22px; line-height: 1.7;
  border-top: 1px solid var(--line); padding-top: 16px; max-width: 52ch;
}
.lab-result-links { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- Tier result page (static) — same flat, un-boxed
   treatment as the live result screen. ---------- */
.tier-page-card { background: transparent; border: none; padding: 0; margin-top: 12px; }
.tier-page-value {
  font-family: var(--mono, var(--font-mono)); font-variant-numeric: tabular-nums;
  font-size: clamp(32px, 6vw, 52px); font-weight: 600; color: var(--ink, var(--color-ink));
  margin: 8px 0 6px;
}