/* hidden 属性优先级修复，防止 display:flex 覆盖 */
[hidden] { display: none !important; }

/* ── 变量 ── */
:root {
  --bg:        #0E1A14;
  --bg-card:   #162019;
  --bg-input:  #1A2820;
  --border:    rgba(29,158,117,0.2);
  --green:     #1D9E75;
  --green-lt:  #5DCAA5;
  --red:       #E05C5C;
  --orange:    #D97B2A;
  --text:      #E2F0EA;
  --muted:     #89A898;
  --radius:    10px;
  --font:      -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Header ── */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}
.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.logo { font-size: 20px; font-weight: 700; color: var(--green-lt); }
.tagline { font-size: 13px; color: var(--muted); }

/* ── Main layout ── */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

/* ── Selector section ── */
.selector-section { margin-bottom: 40px; }

.step-label {
  font-size: 13px;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 600;
  margin: 28px 0 12px;
}
.step-label:first-child { margin-top: 0; }

/* Strategy cards */
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
@media (max-width: 600px) {
  .strategy-grid { grid-template-columns: repeat(2, 1fr); }
}

.strategy-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  transition: border-color .18s, background .18s;
}
.strategy-card:hover { border-color: var(--green); }
.strategy-card.selected {
  border-color: var(--green-lt);
  background: rgba(29,158,117,0.12);
}
.strat-name { font-weight: 600; font-size: 14px; color: var(--text); }
.strat-desc { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* Dropdowns */
.select-row { display: flex; gap: 10px; flex-wrap: wrap; }
.select-box {
  flex: 1;
  min-width: 140px;
  background: var(--bg-input);
  color: var(--text);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px;
  font-family: var(--font);
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}
.select-box:focus { outline: none; border-color: var(--green); }

/* Run button */
.run-btn {
  margin-top: 20px;
  width: 100%;
  padding: 14px;
  background: var(--green);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: background .18s, opacity .18s;
}
.run-btn:hover:not(:disabled) { background: var(--green-lt); color: var(--bg); }
.run-btn:disabled { opacity: .45; cursor: not-allowed; }

/* ── Report section ── */
.report-section { animation: fadeIn .3s ease; }
@keyframes fadeIn { from { opacity:0; transform:translateY(12px); } to { opacity:1; transform:none; } }

/* Conclusion bar */
.conclusion-bar {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
  border: 1px solid var(--border);
}
.conc-item { text-align: center; flex: 1; min-width: 120px; }
.conc-label { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.conc-value { font-size: 28px; font-weight: 700; }
.conc-value.positive { color: var(--green-lt); }
.conc-value.negative { color: var(--red); }
.conc-badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}
.conc-badge.win { background: rgba(29,158,117,.2); color: var(--green-lt); }
.conc-badge.lose { background: rgba(224,92,92,.15); color: var(--red); }
.conc-badge.tie { background: rgba(137,168,152,.15); color: var(--muted); }

/* Data as-of */
.data-as-of {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 16px;
  text-align: right;
}

/* Chart */
.chart-wrap {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 16px;
  margin-bottom: 20px;
}
#chart { width: 100%; height: 300px; }
.chart-legend {
  display: flex;
  gap: 20px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.legend-dot { width: 12px; height: 3px; border-radius: 2px; }

/* Metrics grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 32px;
}
@media (max-width: 500px) {
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
}
.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.metric-label { font-size: 12px; color: var(--muted); }
.metric-value { font-size: 22px; font-weight: 700; margin-top: 4px; }
.metric-value.positive { color: var(--green-lt); }
.metric-value.negative { color: var(--red); }
.metric-value.neutral { color: var(--text); }

/* Section title */
.section-title { font-size: 16px; font-weight: 700; color: var(--green-lt); margin-bottom: 4px; }
.section-sub { font-size: 13px; color: var(--muted); margin-bottom: 16px; }

/* Robustness grid */
.robustness-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}
@media (max-width: 720px) {
  .robustness-grid { grid-template-columns: 1fr; }
}
.rob-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.rob-title { font-size: 13px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.rob-verdict {
  font-size: 12px;
  padding: 8px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
  line-height: 1.5;
}
.rob-verdict.ok { background: rgba(29,158,117,.1); color: var(--green-lt); }
.rob-verdict.warn { background: rgba(224,92,92,.12); color: var(--red); }
.rob-verdict.caution { background: rgba(217,123,42,.1); color: var(--orange); }
.rob-verdict.na { background: rgba(137,168,152,.08); color: var(--muted); }

/* Slippage bars */
.slip-rows { display: flex; flex-direction: column; gap: 8px; }
.slip-row { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.slip-label { width: 46px; color: var(--muted); flex-shrink: 0; }
.slip-track { flex: 1; height: 8px; background: rgba(255,255,255,.06); border-radius: 4px; overflow: hidden; }
.slip-fill { height: 100%; border-radius: 4px; transition: width .4s ease; }
.slip-fill.pos { background: var(--green); }
.slip-fill.neg { background: var(--red); }
.slip-val { width: 52px; text-align: right; color: var(--text); flex-shrink: 0; }

/* Param robustness table */
.prb-table { width: 100%; font-size: 12px; border-collapse: collapse; }
.prb-table td { padding: 4px 6px; color: var(--muted); }
.prb-table td:last-child { text-align: right; color: var(--text); }
.prb-stat-row { display: flex; justify-content: space-between; font-size: 12px; margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border); }
.prb-stat-key { color: var(--muted); }
.prb-stat-val { color: var(--text); font-weight: 600; }

/* OOS comparison */
.oos-compare { display: flex; gap: 12px; margin-bottom: 8px; }
.oos-box { flex: 1; text-align: center; background: rgba(255,255,255,.04); border-radius: 6px; padding: 10px; }
.oos-box-label { font-size: 11px; color: var(--muted); }
.oos-box-val { font-size: 18px; font-weight: 700; margin-top: 4px; }

/* Capture bar */
.capture-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.capture-btn {
  flex: 1;
  padding: 12px;
  border-radius: var(--radius);
  border: 1.5px solid var(--green);
  background: transparent;
  color: var(--green-lt);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: background .18s;
  min-width: 160px;
}
.capture-btn:hover { background: rgba(29,158,117,.12); }
.capture-btn.secondary { border-color: var(--border); color: var(--muted); }
.capture-btn.secondary:hover { background: rgba(255,255,255,.04); }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}
.disclaimer { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.privacy { font-size: 11px; color: rgba(137,168,152,.6); }

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  width: 100%;
  max-width: 380px;
}
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.modal-desc { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.modal-input {
  width: 100%;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
  margin-bottom: 14px;
}
.modal-input:focus { outline: none; border-color: var(--green); }
.modal-actions { display: flex; gap: 10px; margin-bottom: 10px; }
.modal-actions .run-btn { margin-top: 0; }
.modal-note { font-size: 11px; color: var(--muted); text-align: center; }

/* Loading state */
.run-btn.loading { opacity: .7; cursor: wait; }

/* ── 名词解释 ── */
.glossary-section { max-width: 780px; margin: 0 auto 24px; padding: 0 16px; }
.glossary-toggle { width: 100%; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; color: var(--green-lt); font-size: 14px; font-family: var(--font); cursor: pointer; text-align: left; }
.glossary-toggle:hover { border-color: var(--green); }
.glossary-body { margin-top: 2px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 18px; }
.glossary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.glossary-item { padding: 14px; background: var(--bg); border-radius: 8px; border: 1px solid var(--border); }
.glossary-term { font-size: 13px; font-weight: 700; color: var(--green-lt); margin-bottom: 6px; }
.glossary-def { font-size: 13px; color: var(--muted); line-height: 1.7; }
@media(max-width:600px){ .glossary-grid { grid-template-columns: 1fr; } }