:root {
  --navy: #0F172A;
  --green: #16C79A;
  --green-data: #3B7D6E;
  --red-data: #9A5858;
  --text: #1A1F2C;
  --muted: #5C6570;
  --faint: #8B939E;
  --line: #E6E4DE;
  --paper: #F4F2EC;
  --white: #fff;
  --fs-title: 32px;
  --fs-h2: 15px;
  --fs-body: 15px;
  --fs-meta: 12px;
  --fs-num: 20px;
  --fs-nav: 13px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --ease: 160ms ease;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--paper);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.01em;
}
.wrap { width: min(1080px, calc(100% - 48px)); margin: auto; }
.num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 56px;
  background: rgba(244,242,236,.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { text-decoration: none; margin-right: auto; }
.brand img { display: block; width: 96px; height: auto; }
.nav nav { display: flex; gap: 22px; }
.nav nav a {
  color: var(--faint);
  text-decoration: none;
  font-size: var(--fs-nav);
  letter-spacing: 0.04em;
}
.nav nav a:hover { color: var(--navy); }
.run-status {
  margin: 0;
  color: var(--green-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  display: inline-block;
}
.nav nav a:focus-visible,
.strategy-btn:focus-visible,
.close:focus-visible,
.join-cta:focus-visible,
.join-submit:focus-visible {
  outline: 1px solid var(--navy);
  outline-offset: 3px;
}

.ledger-banner {
  margin: 12px auto 0;
  color: var(--red-data);
  font-size: var(--fs-meta);
}

.intro { padding: 36px 0 20px; }
.intro-inner { max-width: 640px; }
.intro h1 {
  margin: 0 0 14px;
  font-size: var(--fs-title);
  font-weight: 500;
  line-height: 1.28;
  color: var(--navy);
  letter-spacing: 0.02em;
}
.intro-lead {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}
.live-facts {
  margin: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  color: var(--faint);
  font-size: 12px;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}
.fact-run {
  color: var(--green-data);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.section { padding: 12px 0 28px; }
.section h2 {
  margin: 0 0 8px;
  font-size: var(--fs-h2);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: none;
  color: var(--navy);
}
.section-lead {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}
.section-head { margin-bottom: 12px; }
.history-summary {
  margin: 8px 0 0;
  color: var(--faint);
  font-size: 12px;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.today-panel { max-width: 560px; }
.today-status { padding: 4px 0 8px; }
.today-status-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--faint);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  margin-bottom: 8px;
}
.today-flag {
  color: var(--green-data);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.today-status-title {
  display: block;
  font-weight: 500;
  color: var(--navy);
  font-size: 15px;
}
.today-status-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.empty-state span { display: block; color: var(--faint); font-size: 12px; margin-top: 4px; }

.section-history,
.section-evidence {
  background: #F8F7F3;
}
.section-history .section-head,
.section-history .ledger {
  max-width: 780px;
}
.ledger-head {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
.ledger-row {
  display: grid;
  grid-template-columns: 184px 104px 192px 120px max-content;
  column-gap: 28px;
  width: max-content;
  max-width: 780px;
  align-items: start;
  min-height: 76px;
  padding: 14px 0;
  border-bottom: 1px solid #E2E0DA;
}
.ledger-row:last-child { border-bottom: 0; }
.ledger-row:hover { background: transparent; }
.identity .close-inline { display: none; }
.close-as-of { display: none; }
.identity strong {
  display: block;
  color: var(--navy);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.01em;
}
.identity small {
  display: block;
  color: var(--faint);
  font-size: 12px;
  font-weight: 400;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}
.identity .selected {
  display: block;
  color: var(--faint);
  font-size: 12px;
  font-weight: 400;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}
.metric {
  text-align: right;
}
.metric .lbl {
  display: block;
  color: var(--faint);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.metric .num {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--faint);
}
.metric.cell-close .num {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.15;
}
.metric.peak .num {
  font-size: 14px;
  font-weight: 400;
}
.metric.d1 .num {
  font-size: 12px;
  font-weight: 400;
  color: var(--faint);
}
.metric.peak .peak-date {
  display: block;
  color: var(--faint);
  font-size: 11px;
  font-weight: 400;
  margin-top: 3px;
  font-variant-numeric: tabular-nums;
}
.ret-up { color: var(--green-data); }
.ret-down { color: var(--red-data); }
.no-data { color: var(--muted); padding: 20px 0; }

.strategy-btn {
  border: 0;
  background: transparent;
  color: var(--faint);
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  cursor: pointer;
  text-align: right;
  justify-self: end;
}
.strategy-btn:hover { color: var(--navy); }

.example-row {
  padding: 12px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}
.example-row strong { display: block; color: var(--navy); font-weight: 500; }
.example-row small { display: block; color: var(--faint); font-size: 12px; }
.eyebrow { font-size: 12px; color: var(--green-data); letter-spacing: 0.04em; }

.section-evidence { padding-top: 20px; padding-bottom: 36px; }
.section-evidence h2,
.section-evidence .section-lead,
.section-evidence .evidence-trail,
.section-evidence .evidence-dates {
  max-width: 780px;
}
.evidence-trail {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  position: relative;
}
.evidence-trail::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  height: 1px;
  background: #E2E0DA;
  z-index: 0;
}
.evidence-trail li {
  position: relative;
  z-index: 1;
  padding: 0 20px 0 0;
  color: var(--navy);
}
.evidence-trail li:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: 4px;
  top: 2px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 400;
  line-height: 1;
  z-index: 2;
}
.step-num {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--faint);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.step-num::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  border: 3px solid #F8F7F3;
  box-sizing: content-box;
  flex-shrink: 0;
}
.evidence-trail strong {
  display: block;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.evidence-trail .step-body {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.55;
}
.evidence-trail .step-fact {
  display: block;
  margin-top: 4px;
  color: var(--navy);
  font-size: 13px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.evidence-trail .step-fact.ret-up { color: var(--green-data); }
.evidence-trail .step-fact.ret-down { color: var(--red-data); }
.evidence-trail .step-sub {
  display: block;
  margin-top: 2px;
  color: var(--faint);
  font-size: 12px;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}
.evidence-dates { margin: 16px 0 0; font-size: 12px; line-height: 1.5; }
.evidence-dates .as-of,
.evidence-dates .recorded { display: block; color: var(--faint); }

.about {
  padding: 28px 0 48px;
  border-top: 1px solid var(--line);
}
.about-inner { max-width: 480px; }
.about h2 {
  margin: 0 0 12px;
  font-size: var(--fs-h2);
  letter-spacing: 0.12em;
  font-weight: 500;
}
.about p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 15px;
}
.about-close {
  margin-top: 16px;
  color: var(--navy) !important;
}

.footer { padding: 0 0 40px; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--faint);
  font-size: 12px;
  letter-spacing: 0.04em;
}

dialog {
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 28px 24px 20px;
  max-width: 420px;
  background: var(--paper);
  color: var(--navy);
}
dialog::backdrop { background: rgba(15,23,42,.28); }
dialog h3 { margin: 8px 0 16px; font-weight: 500; font-size: 18px; }
.close {
  position: absolute;
  top: 10px;
  right: 12px;
  border: 0;
  background: transparent;
  font-size: 20px;
  cursor: pointer;
  color: var(--faint);
}
.strategy-grid { display: grid; gap: 8px; font-size: 14px; }
.strategy-grid .open { color: var(--navy); }
.strategy-grid .locked { color: var(--faint); }
.dialog-lead {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}
.join-cta {
  display: inline-block;
  margin-top: 20px;
  color: var(--navy);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--navy);
  padding-bottom: 1px;
}
.join-cta:hover { color: var(--green-data); border-bottom-color: var(--green-data); }

.join-page { padding: 36px 0 48px; }
.join-inner { max-width: 520px; }
.join-page h1 {
  margin: 0 0 12px;
  font-size: 28px;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.02em;
}
.join-lead {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}
.join-page fieldset {
  border: 0;
  margin: 28px 0 0;
  padding: 0;
}
.join-page legend {
  padding: 0;
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 15px;
  font-weight: 500;
}
.join-page .hint {
  color: var(--faint);
  font-weight: 400;
  font-size: 12px;
}
.join-page .opt {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 0 0 8px;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}
.join-page .opt input { margin-top: 4px; }
.join-page .field {
  display: block;
  margin: 0 0 12px;
  color: var(--faint);
  font-size: 12px;
}
.join-page .field input {
  display: block;
  width: 100%;
  margin-top: 4px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  padding: 8px 0;
  font-size: 15px;
  color: var(--navy);
}
.join-page .field input:focus {
  outline: none;
  border-bottom-color: var(--navy);
}
.join-submit {
  margin-top: 24px;
  border: 1px solid var(--navy);
  background: transparent;
  color: var(--navy);
  padding: 10px 18px;
  font-size: 14px;
  letter-spacing: 0.04em;
  cursor: pointer;
  min-height: 44px;
  min-width: 96px;
}
.join-submit:hover { background: var(--navy); color: var(--paper); }
.join-submit:disabled { opacity: 0.45; cursor: default; }
.form-error { margin: 12px 0 0; color: var(--red-data); font-size: 13px; }
.join-fail { margin-top: 16px; color: var(--red-data); font-size: 14px; }
.join-fail p { margin: 0; }
.join-page .hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.join-done { margin-top: 28px; }
.join-done p { margin: 0 0 8px; color: var(--muted); }
.join-done strong { color: var(--navy); font-weight: 500; }
.text-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--navy);
  font-size: 14px;
}

@media(max-width:720px) {
  .wrap { width: min(100% - 28px, 1120px); }
  .nav nav { gap: 14px; }
  .nav nav a { font-size: 12px; }
  .run-status { display: none; }
  .intro { padding: 24px 0 12px; }
  .intro h1 { font-size: 26px; }
  .ledger-head { display: none; }
  .ledger-row {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: auto;
    max-width: none;
    padding: 16px 0;
  }
  .identity { order: 1; }
  .identity .close-inline { display: inline; }
  .identity .row-top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
  }
  .identity .row-top .num {
    font-size: 20px;
    font-weight: 500;
  }
  .metric.cell-close { display: none; }
  .section-history .section-head,
  .section-history .ledger,
  .section-evidence h2,
  .section-evidence .section-lead,
  .section-evidence .evidence-trail,
  .section-evidence .evidence-dates { max-width: none; }
  .evidence-trail {
    display: block;
    margin-top: 16px;
    padding-left: 22px;
    position: relative;
  }
  .evidence-trail::before {
    top: 8px;
    bottom: 8px;
    left: 6px;
    right: auto;
    width: 1px;
    height: auto;
    background: #E2E0DA;
  }
  .evidence-trail li {
    padding: 0 0 22px 0;
    position: relative;
  }
  .evidence-trail li:last-child {
    padding-bottom: 0;
  }
  .evidence-trail li:not(:last-child)::after {
    content: none;
  }
  .evidence-trail .step-num {
    position: relative;
    margin-bottom: 8px;
  }
  .evidence-trail .step-num::before {
    position: absolute;
    left: -22px;
    top: 1px;
  }
  .evidence-trail strong { font-size: 14px; }
  .metric.peak { order: 2; }
  .metric.d1 { order: 3; }
  .metric.peak,
  .metric.d1 {
    display: flex;
    justify-content: space-between;
    text-align: left;
    margin-top: 8px;
  }
  .metric .lbl {
    display: inline;
    color: var(--faint);
    font-size: 12px;
  }
  .metric.peak .num,
  .metric.d1 .num { font-size: 13px; }
  .metric.peak .peak-date { display: none; }
  .close-as-of {
    order: 4;
    display: block;
    margin-top: 8px;
    color: var(--faint);
    font-size: 12px;
    font-variant-numeric: tabular-nums;
  }
  .strategy-btn {
    order: 5;
    width: 100%;
    text-align: left;
    margin-top: 10px;
    justify-self: start;
  }
  .method { flex-direction: column; }
  .method li:not(:last-child)::after { content: "↓"; margin: 4px 0 4px 0; }
  .join-page { padding: 24px 0 40px; }
  .join-page h1 { font-size: 24px; }
}