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

:root {
  --gold: #c8942a;
  --gold-light: #f0c040;
  --bg: #f5f5f0;
  --surface: #ffffff;
  --border: #e0ddd5;
  --text: #222;
  --muted: #666;
  --green: #2a8a4a;
  --red: #c0392b;
  --blue: #2563eb;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Header */
header {
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  border-bottom: 3px solid var(--gold);
  padding: 16px 24px;
}
.header-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
header h1 {
  color: var(--gold-light);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* アセット選択ナビ */
.asset-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.asset-btn {
  padding: 5px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid #555;
  border-radius: 20px;
  background: transparent;
  color: #ccc;
  cursor: pointer;
  transition: all .15s;
}
.asset-btn:hover { border-color: var(--gold); color: var(--gold-light); }
.asset-btn.active { background: var(--gold); border-color: var(--gold); color: #fff; }

/* Main */
main { max-width: 900px; margin: 24px auto; padding: 0 16px; display: flex; flex-direction: column; gap: 20px; }

/* Card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}

/* Price */
.price-card { text-align: center; border-top: 3px solid var(--gold); }
.price-label { font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }
.price-value { font-size: 3rem; font-weight: 700; letter-spacing: -0.02em; }
.price-meta { display: flex; justify-content: center; align-items: center; gap: 12px; margin-top: 8px; }
.change { font-size: 1rem; font-weight: 600; }
.change.up { color: var(--green); }
.change.down { color: var(--red); }
.unit { font-size: 0.8rem; color: var(--muted); }
.price-time { font-size: 0.75rem; color: var(--muted); margin-top: 6px; }

/* Chart */
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; flex-wrap: wrap; gap: 8px; }
.card-header h2 { font-size: 1rem; color: var(--text); }
.period-buttons { display: flex; gap: 4px; }
.period-btn {
  padding: 4px 10px;
  font-size: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  color: var(--muted);
  transition: all .15s;
}
.period-btn:hover, .period-btn.active {
  background: var(--gold); color: #fff; border-color: var(--gold);
}
.chart-wrap { position: relative; height: 280px; }

/* Prediction */
.badge-beta {
  font-size: 0.65rem;
  font-weight: 700;
  background: var(--blue);
  color: #fff;
  padding: 2px 7px;
  border-radius: 10px;
  letter-spacing: 0.05em;
}
.prediction-note {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.5;
}
.prediction-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
.pred-loading { color: var(--muted); font-size: 0.88rem; grid-column: 1/-1; }
.pred-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  background: var(--bg);
}
.pred-label { font-size: 0.75rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }

/* 予測方向バッジ */
.dir-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 700;
  margin: 4px 0 2px;
}
.dir-badge.up   { background: #dcfce7; color: #166534; }
.dir-badge.down { background: #fee2e2; color: #991b1b; }
.dir-badge.small { font-size: 0.68rem; padding: 1px 6px; }

.pred-price { font-size: 1.5rem; font-weight: 700; margin: 4px 0 4px; }
.pred-price.up { color: var(--green); }
.pred-price.down { color: var(--red); }
.pred-ci { font-size: 0.72rem; color: var(--muted); }
.pred-change { font-size: 0.78rem; font-weight: 600; margin-top: 4px; }
.pred-change.up { color: var(--green); }
.pred-change.down { color: var(--red); }
.pred-date { font-size: 0.7rem; color: #aaa; margin-top: 4px; }

/* Badge variants */
.badge-info {
  font-size: 0.65rem;
  font-weight: 700;
  background: #6b7280;
  color: #fff;
  padding: 2px 7px;
  border-radius: 10px;
  letter-spacing: 0.05em;
}

/* Backtest table */
.backtest-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  margin-top: 4px;
}
.backtest-table th {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 2px solid var(--border);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}
.backtest-table td {
  padding: 10px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.backtest-table tr:last-child td { border-bottom: none; }
.hit-badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 8px;
  font-size: 0.68rem;
  font-weight: 700;
  vertical-align: middle;
  margin-left: 3px;
}
.hit-badge.hit  { background: #dcfce7; color: #166534; }
.hit-badge.miss { background: #fee2e2; color: #991b1b; }

/* トレード評価バッジ */
.trade-badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
}
.trade-badge.great { background: #dcfce7; color: #14532d; }
.trade-badge.ok    { background: #fef9c3; color: #713f12; }
.trade-badge.bad   { background: #fee2e2; color: #7f1d1d; }

/* Rolling eval details */
.rolling-detail {
  margin-top: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.rolling-detail summary {
  padding: 10px 14px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--blue);
  background: var(--bg);
  user-select: none;
  list-style: none;
}
.rolling-detail summary::before { content: '▶ '; font-size: 0.65rem; }
.rolling-detail[open] summary::before { content: '▼ '; }
.rolling-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 14px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}
.rolling-table-wrap {
  overflow-x: auto;
}

/* Legend */
.legend-box {
  margin-top: 20px;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.82rem;
}
.legend-box--compact { margin-top: 12px; padding: 10px 14px; }
.legend-title { font-weight: 600; color: var(--text); margin-bottom: 10px; font-size: 0.82rem; }
.legend-grid { display: flex; flex-wrap: wrap; gap: 10px 24px; margin-bottom: 8px; }
.legend-item { display: flex; align-items: center; gap: 7px; color: var(--muted); }
.legend-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.legend-dot.up   { background: var(--green); }
.legend-dot.down { background: var(--red); }
.legend-range {
  display: inline-block;
  width: 28px; height: 10px;
  background: linear-gradient(90deg, #2a8a4a22, #2a8a4a55, #2a8a4a22);
  border: 1px solid #2a8a4a66;
  border-radius: 3px;
  flex-shrink: 0;
}

/* Methodology details */
.method-detail { margin-top: 10px; }
.method-detail summary {
  cursor: pointer;
  color: var(--blue);
  font-size: 0.8rem;
  user-select: none;
  list-style: none;
}
.method-detail summary::before { content: '▶ '; font-size: 0.65rem; }
.method-detail[open] summary::before { content: '▼ '; }
.method-body {
  margin-top: 10px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text);
}
.method-body p { margin-bottom: 8px; }
.formula-box {
  background: #1e1e2e;
  color: #a6e3a1;
  padding: 10px 14px;
  border-radius: 6px;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.78rem;
  margin: 10px 0;
  overflow-x: auto;
  white-space: nowrap;
}
.method-list {
  padding-left: 18px;
  margin: 8px 0;
}
.method-list li { margin-bottom: 4px; }
.method-note {
  color: var(--muted);
  font-size: 0.76rem;
  margin-top: 8px;
  margin-bottom: 0 !important;
}

/* Premium CTA */
.premium-cta {
  margin-top: 16px;
  border: 2px dashed var(--gold);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}
.premium-inner .premium-icon { font-size: 2rem; margin-bottom: 8px; }
.premium-inner p { font-size: 0.88rem; color: var(--muted); margin-bottom: 14px; }
.btn { padding: 9px 20px; border: none; border-radius: 5px; font-size: 0.88rem; font-weight: 600; cursor: pointer; transition: opacity .15s; }
.btn:hover { opacity: .85; }
.btn-gold { background: var(--gold); color: #fff; }

/* Footer */
footer { text-align: center; padding: 24px 16px; color: var(--muted); font-size: 0.72rem; }

@media (max-width: 600px) {
  .price-value { font-size: 2.2rem; }
  .card { padding: 16px; }
  .prediction-grid { grid-template-columns: 1fr 1fr; }
}