:root {
  --bg: #0c0c0f;
  --surface: #13131a;
  --card: #16161f;
  --border: #1e1e2e;
  --border-strong: #2b2b40;
  --accent: #6ee7b7;
  --accent2: #818cf8;
  --text: #e2e8f0;
  --muted: #64748b;
  --muted-bright: #94a3b8;
  --positive: #4ade80;
  --negative: #f87171;
  --warning: #fbbf24;
  --gold: #f6c85f;
  --nav-h: 68px;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  line-height: 1.7;
}

button,
input { font: inherit; }

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Existing site navigation */
.main-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.2rem;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--border);
  background: rgba(12, 12, 15, .88);
  backdrop-filter: blur(18px);
  box-sizing: border-box;
}

.nav-logo {
  position: absolute;
  left: clamp(1.5rem, 5vw, 4rem);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -.02em;
  text-decoration: none;
}

.nav-logo span,
.footer-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 2.2rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a,
.nav-github {
  color: var(--text);
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .03em;
  text-decoration: none;
  transition: color .2s, border-color .2s, background .2s;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-github:hover,
.nav-github:focus-visible { color: var(--accent); }

.nav-github {
  position: absolute;
  right: clamp(1.5rem, 5vw, 4rem);
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem .9rem;
  border: 1px solid var(--text);
  border-radius: 8px;
}

.nav-github:hover,
.nav-github:focus-visible { border-color: var(--accent); }
.nav-github svg { width: 15px; height: 15px; fill: currentColor; }

.nav-toggle {
  position: absolute;
  right: clamp(1.5rem, 5vw, 4rem);
  z-index: 102;
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform .25s, opacity .2s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: var(--nav-h) 0 auto;
  z-index: 99;
  display: none;
  max-height: 0;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: rgba(12, 12, 15, .98);
  backdrop-filter: blur(18px);
  transition: max-height .3s ease;
}

.mobile-menu.open { max-height: calc(100vh - var(--nav-h)); overflow-y: auto; }
.mobile-menu ul { margin: 0; padding: .4rem 1.5rem 1.4rem; list-style: none; }
.mobile-menu li + li { border-top: 1px solid var(--border); }
.mobile-menu a { display: block; padding: .8rem 0; color: var(--text); text-decoration: none; }
.mobile-menu a:hover,
.mobile-menu a:focus-visible,
.mobile-menu .mobile-github { color: var(--accent); }

/* Backtester surface */
.asset-backtester,
.asset-backtester * { box-sizing: border-box; }

.asset-backtester {
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: calc(var(--nav-h) + 2.25rem) clamp(1rem, 4vw, 4rem) 6rem;
}

.asset-backtester__page-head { margin-bottom: 2rem; }

.asset-backtester__breadcrumb {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: 1.35rem;
  color: var(--muted);
  font-size: .76rem;
}

.asset-backtester__breadcrumb a {
  color: var(--muted-bright);
  text-decoration: none;
}

.asset-backtester__breadcrumb a:hover,
.asset-backtester__breadcrumb a:focus-visible { color: var(--accent); }

.asset-backtester__head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
}

.asset-backtester__eyebrow,
.asset-backtester__section-label,
.asset-backtester__chart-kicker {
  margin: 0 0 .45rem;
  color: var(--accent);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .17em;
  text-transform: uppercase;
}

.asset-backtester h1,
.asset-backtester h2,
.asset-backtester h3 {
  margin: 0;
  font-family: 'Syne', sans-serif;
  letter-spacing: -.03em;
}

.asset-backtester h1 {
  max-width: 15ch;
  font-size: clamp(2.15rem, 4.6vw, 4rem);
  font-weight: 800;
  line-height: .98;
}

.asset-backtester h1 em { color: var(--accent); font-style: normal; }

.asset-backtester__subtitle {
  margin: .65rem 0 .15rem;
  color: var(--text);
  font-family: 'Syne', sans-serif;
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-weight: 600;
}

.asset-backtester__intro {
  max-width: 68ch;
  margin: .5rem 0 0;
  color: var(--muted-bright);
  font-size: .92rem;
}

.asset-backtester__data-badge {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: .55rem;
  padding: .55rem .8rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted-bright);
  font-size: .76rem;
  white-space: nowrap;
}

.asset-backtester__status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--warning);
  box-shadow: 0 0 0 4px rgba(251, 191, 36, .08);
}

.asset-backtester__data-badge.is-current .asset-backtester__status-dot { background: var(--positive); box-shadow: 0 0 0 4px rgba(74, 222, 128, .08); }
.asset-backtester__data-badge.is-error .asset-backtester__status-dot { background: var(--negative); box-shadow: 0 0 0 4px rgba(248, 113, 113, .08); }

.asset-backtester__live { min-height: 1px; }

.asset-backtester__section { margin-top: 3.4rem; }
.asset-backtester__section--summary { margin-top: 2rem; }

.asset-backtester__section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.asset-backtester__section-head h2 {
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  line-height: 1.08;
}

.asset-backtester__section-head > p {
  margin: 0;
  color: var(--muted);
  font-size: .77rem;
  text-align: right;
}

.asset-backtester__table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
  scrollbar-color: var(--border-strong) var(--surface);
}

.asset-backtester__table-scroll:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.asset-backtester__table {
  width: 100%;
  min-width: 920px;
  border-collapse: separate;
  border-spacing: 0;
  font-size: .82rem;
}

.asset-backtester__table th,
.asset-backtester__table td {
  padding: .92rem .95rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: right;
  white-space: nowrap;
}

.asset-backtester__table tr:last-child th,
.asset-backtester__table tr:last-child td { border-bottom: 0; }
.asset-backtester__table th:last-child,
.asset-backtester__table td:last-child { border-right: 0; }

.asset-backtester__table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface);
  color: var(--muted-bright);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.asset-backtester__table th:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
  min-width: 150px;
  background: var(--surface);
  text-align: left;
}

.asset-backtester__table tbody th {
  color: var(--text);
  font-family: 'Syne', sans-serif;
  font-size: .83rem;
  font-weight: 700;
}

.asset-backtester__asset-mark {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: .55rem;
  border: 2px solid currentColor;
  border-radius: 50%;
}
.asset-backtester__asset-mark--sp500 { color: var(--accent); }
.asset-backtester__asset-mark--bitcoin { color: var(--accent2); border-radius: 1px; transform: rotate(45deg); }
.asset-backtester__asset-mark--gold { color: var(--gold); border-radius: 0; }

.asset-backtester__period-cell {
  width: 100%;
  min-width: 98px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  text-align: right;
  cursor: help;
}

.asset-backtester__period-cell:focus-visible {
  border-radius: 5px;
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.asset-backtester__period-return {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: .93rem;
  font-weight: 700;
}

.asset-backtester__period-return.is-positive::before { content: '↗ '; }
.asset-backtester__period-return.is-negative::before { content: '↘ '; }
.asset-backtester__period-return.is-neutral::before { content: '→ '; }
.asset-backtester__period-return.is-positive { color: var(--positive); }
.asset-backtester__period-return.is-negative { color: var(--negative); }
.asset-backtester__period-return.is-neutral { color: var(--muted-bright); }

.asset-backtester__period-value {
  display: block;
  margin-top: .12rem;
  color: var(--muted);
  font-size: .68rem;
}

.asset-backtester__table-note {
  margin: .55rem .2rem 0;
  color: var(--muted);
  font-size: .72rem;
}

.asset-backtester__single-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.asset-backtester__chart-card,
.asset-backtester__comparison-card {
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
}

.asset-backtester__chart-card { padding: 1.15rem; }
.asset-backtester__comparison-card { padding: clamp(1rem, 2vw, 1.65rem); }

.asset-backtester__chart-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem;
  min-height: 92px;
}

.asset-backtester__chart-head h3 { font-size: 1.12rem; }
.asset-backtester__chart-kicker { display: flex; align-items: center; gap: .45rem; margin-bottom: .25rem; font-size: .61rem; }

.asset-backtester__line-key {
  display: inline-block;
  width: 20px;
  height: 3px;
  flex: 0 0 auto;
  background: currentColor;
  vertical-align: middle;
}
.asset-backtester__line-key--sp500 { color: var(--accent); }
.asset-backtester__line-key--bitcoin { color: var(--accent2); }
.asset-backtester__line-key--gold { color: var(--gold); }

.asset-backtester__proxy {
  max-width: 30ch;
  margin: .24rem 0 0;
  color: var(--muted);
  font-size: .68rem;
  line-height: 1.4;
}

.asset-backtester__quote { flex: 0 0 auto; text-align: right; }
.asset-backtester__quote strong { display: block; color: var(--text); font-family: 'Syne', sans-serif; font-size: 1.05rem; font-weight: 700; }
.asset-backtester__quote span { display: block; color: var(--muted); font-size: .65rem; }
.asset-backtester__quote span.is-positive { color: var(--positive); }
.asset-backtester__quote span.is-negative { color: var(--negative); }

.asset-backtester__intervals {
  display: flex;
  gap: .24rem;
  max-width: 100%;
  margin: .7rem 0 .85rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.asset-backtester__interval-button {
  flex: 0 0 auto;
  min-width: 34px;
  padding: .3rem .43rem;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: .65rem;
  font-weight: 600;
  cursor: pointer;
  transition: color .16s, border-color .16s, background .16s;
}

.asset-backtester__interval-button:hover { color: var(--text); border-color: var(--border-strong); }
.asset-backtester__interval-button[aria-pressed="true"] { border-color: rgba(110, 231, 183, .28); background: rgba(110, 231, 183, .09); color: var(--accent); }
.asset-backtester__interval-button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.asset-backtester__chart-frame {
  position: relative;
  width: 100%;
  height: 250px;
  overflow: hidden;
  border-top: 1px solid var(--border);
}

.asset-backtester__chart-frame--comparison { height: 470px; border-top: 0; }
.asset-backtester__chart-frame canvas { position: relative; z-index: 1; width: 100% !important; height: 100% !important; }

.asset-backtester__skeleton {
  position: absolute;
  inset: 1rem 0;
  z-index: 2;
  border-radius: 8px;
  background:
    linear-gradient(100deg, transparent 25%, rgba(255, 255, 255, .035) 42%, transparent 58%) 0 0 / 200% 100%,
    repeating-linear-gradient(0deg, transparent 0 47px, rgba(255, 255, 255, .035) 48px 49px),
    linear-gradient(155deg, transparent 40%, rgba(110, 231, 183, .11) 41% 42%, transparent 43% 58%, rgba(129, 140, 248, .09) 59% 60%, transparent 61%);
  animation: asset-backtester-shimmer 1.8s linear infinite;
}

.is-loaded > .asset-backtester__skeleton { display: none; }

@keyframes asset-backtester-shimmer { to { background-position: -200% 0, 0 0, 0 0; } }

.asset-backtester__chart-state {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: rgba(22, 22, 31, .92);
  color: var(--muted-bright);
  font-size: .78rem;
  text-align: center;
}

.asset-backtester__chart-state[hidden] { display: none; }

.asset-backtester__chart-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .8rem;
  padding-top: .65rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .65rem;
}
.asset-backtester__chart-foot b { color: var(--text); font-weight: 600; }

.asset-backtester__control-grid {
  display: grid;
  grid-template-columns: minmax(180px, .5fr) minmax(420px, 1.5fr);
  gap: 1rem;
  align-items: end;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.asset-backtester__field label,
.asset-backtester__asset-selector legend {
  display: block;
  margin-bottom: .45rem;
  color: var(--muted-bright);
  font-size: .67rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.asset-backtester__money-input { position: relative; }
.asset-backtester__money-input input {
  width: 100%;
  height: 44px;
  padding: 0 2.4rem 0 .8rem;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  outline: none;
  background: var(--surface);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  font-weight: 700;
}
.asset-backtester__money-input span { position: absolute; top: 50%; right: .85rem; color: var(--accent); transform: translateY(-50%); }
.asset-backtester__money-input input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(110, 231, 183, .08); }

.asset-backtester__asset-selector {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0;
  padding: 0;
  border: 0;
}
.asset-backtester__asset-selector legend { width: 100%; }
.asset-backtester__asset-selector label { position: relative; cursor: pointer; }
.asset-backtester__asset-selector input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.asset-backtester__asset-selector label > span {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  min-height: 40px;
  padding: .46rem .75rem;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted-bright);
  font-size: .78rem;
  font-weight: 600;
  transition: color .16s, border-color .16s, background .16s;
}
.asset-backtester__asset-selector input:checked + span { border-color: rgba(110, 231, 183, .32); background: rgba(110, 231, 183, .06); color: var(--text); }
.asset-backtester__asset-selector input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.asset-backtester__comparison-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.asset-backtester__comparison-toolbar .asset-backtester__intervals { flex: 1; }

.asset-backtester__custom-dates { display: flex; flex-wrap: wrap; align-items: flex-end; gap: .5rem; padding: .75rem; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
.asset-backtester__custom-dates[hidden] { display: none; }
.asset-backtester__custom-dates label { display: grid; gap: .2rem; color: var(--muted); font-size: .65rem; }
.asset-backtester__custom-dates input { padding: .35rem .45rem; border: 1px solid var(--border-strong); border-radius: 6px; background: var(--bg); color: var(--text); color-scheme: dark; }
.asset-backtester__custom-dates button,
.asset-backtester__notice button {
  padding: .45rem .65rem;
  border: 1px solid rgba(110, 231, 183, .28);
  border-radius: 6px;
  background: rgba(110, 231, 183, .09);
  color: var(--accent);
  font-size: .68rem;
  font-weight: 600;
  cursor: pointer;
}

.asset-backtester__notice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: .75rem 0;
  padding: .7rem .85rem;
  border: 1px solid rgba(251, 191, 36, .22);
  border-left: 3px solid var(--warning);
  border-radius: 0 8px 8px 0;
  background: rgba(251, 191, 36, .05);
  color: var(--muted-bright);
  font-size: .74rem;
}
.asset-backtester__notice[hidden] { display: none; }
.asset-backtester__notice--error { border-color: rgba(248, 113, 113, .25); border-left-color: var(--negative); background: rgba(248, 113, 113, .05); }

.asset-backtester__metrics { min-width: 1040px; }
.asset-backtester__metrics--risk { min-width: 1180px; }
.asset-backtester__metrics tbody td { color: var(--muted-bright); font-variant-numeric: tabular-nums; }
.asset-backtester__metrics tbody td strong { color: var(--text); font-family: 'Syne', sans-serif; font-size: .86rem; }
.asset-backtester__metrics .is-positive { color: var(--positive); }
.asset-backtester__metrics .is-negative { color: var(--negative); }
.asset-backtester__metrics abbr { text-decoration: underline dotted; text-underline-offset: 3px; cursor: help; }
.asset-backtester__metrics-head { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; margin: 1.7rem .15rem .75rem; }
.asset-backtester__metrics-head h3 { font-family: 'Syne', sans-serif; font-size: 1rem; color: var(--text); }
.asset-backtester__metrics-head p { max-width: 66ch; color: var(--muted); font-size: .76rem; text-align: right; }
.asset-backtester__metric-detail { display: block; margin-top: .18rem; color: var(--muted); font-size: .68rem; }

.asset-backtester__method-note {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: .8rem;
  margin-top: 2rem;
  padding: 1rem 1.15rem;
  border: 1px solid rgba(129, 140, 248, .2);
  border-radius: 10px;
  background: rgba(129, 140, 248, .05);
}
.asset-backtester__method-note > span { display: grid; width: 28px; height: 28px; place-items: center; border: 1px solid rgba(129, 140, 248, .35); border-radius: 50%; color: var(--accent2); font-family: 'Syne', sans-serif; font-weight: 700; }
.asset-backtester__method-note p { margin: 0; color: var(--muted-bright); font-size: .8rem; }
.asset-backtester__method-note strong { color: var(--text); }

.asset-backtester__details {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
}
.asset-backtester__details + .asset-backtester__details { margin-top: .65rem; }
.asset-backtester__details summary { padding: .9rem 1rem; color: var(--text); font-family: 'Syne', sans-serif; font-size: .86rem; font-weight: 700; cursor: pointer; }
.asset-backtester__details summary::marker { color: var(--accent); }
.asset-backtester__details summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.asset-backtester__details-body,
.asset-backtester__source-grid { padding: 0 1rem 1rem; border-top: 1px solid var(--border); }
.asset-backtester__details-body p { max-width: 85ch; margin: 1rem 0; color: var(--muted-bright); font-size: .82rem; }
.asset-backtester__details code { color: var(--accent); }
.asset-backtester__knowledge-link { color: var(--accent); text-decoration-color: rgba(129, 140, 248, .45); text-underline-offset: 3px; }
.asset-backtester__knowledge-link:hover { color: var(--accent2); text-decoration-color: currentColor; }
.asset-backtester__knowledge-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.asset-backtester__formula { display: flex; flex-wrap: wrap; gap: .5rem 1rem; padding: .75rem .9rem; border-radius: 8px; background: var(--surface); color: var(--muted); font-size: .75rem; }
.asset-backtester__formula strong { color: var(--text); font-family: 'Syne', sans-serif; }

.asset-backtester__source-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; padding-top: 1rem; }
.asset-backtester__source-card { padding: .9rem; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
.asset-backtester__source-card h3 { margin-bottom: .45rem; font-size: .9rem; }
.asset-backtester__source-card dl { display: grid; grid-template-columns: auto 1fr; gap: .25rem .6rem; margin: 0; font-size: .68rem; }
.asset-backtester__source-card dt { color: var(--muted); }
.asset-backtester__source-card dd { margin: 0; overflow-wrap: anywhere; color: var(--muted-bright); }
.asset-backtester__source-card a { color: var(--accent); text-underline-offset: .18em; }
.asset-backtester__muted { color: var(--muted); }

.asset-backtester__future { margin-top: 1.2rem; padding: 1rem; border: 1px dashed var(--border-strong); border-radius: 10px; }
.asset-backtester__future > div { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .45rem 0; color: var(--muted-bright); font-size: .76rem; }
.asset-backtester__future > div + div { border-top: 1px solid var(--border); }
.asset-backtester__future b { color: var(--muted); font-size: .62rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }

/* Existing site footer */
footer { border-top: 1px solid var(--border); background: var(--surface); }
.footer-inner { display: grid; grid-template-columns: 1.7fr 1fr 1fr; gap: 3rem; padding: 3.5rem clamp(1.5rem, 8vw, 8rem) 2rem; }
.footer-logo { color: var(--text); font-family: 'Syne', sans-serif; font-size: 1.35rem; font-weight: 800; text-decoration: none; }
.footer-brand p { max-width: 34ch; margin: .8rem 0 0; color: var(--muted); font-size: .85rem; line-height: 1.65; }
.footer-col h5 { margin: 0 0 .8rem; color: var(--text); font-family: 'Syne', sans-serif; font-size: .78rem; }
.footer-col ul { display: flex; flex-direction: column; gap: .6rem; margin: 0; padding: 0; list-style: none; }
.footer-col a { color: var(--muted); font-size: .82rem; text-decoration: none; }
.footer-col a:hover,
.footer-col a:focus-visible { color: var(--accent); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; margin: 0 clamp(1.5rem, 8vw, 8rem); padding: 1.2rem 0 2rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .75rem; }
.footer-bottom a { color: var(--muted); text-decoration: none; }
.footer-bottom a:hover,
.footer-bottom a:focus-visible { color: var(--accent); }

@media (max-width: 1200px) {
  .asset-backtester__single-grid { grid-template-columns: 1fr; }
  .asset-backtester__chart-head { min-height: 0; }
  .asset-backtester__chart-frame { height: 310px; }
}

@media (max-width: 960px) {
  .nav-links,
  .nav-github { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { display: block; }
  .asset-backtester__head-row { align-items: flex-start; flex-direction: column; gap: 1rem; }
  .asset-backtester__control-grid { grid-template-columns: 1fr; }
  .asset-backtester__source-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .asset-backtester { padding-inline: 1rem; }
  .asset-backtester__section { margin-top: 2.7rem; }
  .asset-backtester__section-head { align-items: flex-start; flex-direction: column; gap: .25rem; }
  .asset-backtester__section-head > p { text-align: left; }
  .asset-backtester__comparison-toolbar { align-items: stretch; flex-direction: column; }
  .asset-backtester__custom-dates { align-items: stretch; }
  .asset-backtester__custom-dates label { flex: 1 1 130px; }
  .asset-backtester__notice { align-items: flex-start; flex-direction: column; }
  .asset-backtester__chart-frame--comparison { height: 400px; }
  .asset-backtester__metrics-head { display: block; }
  .asset-backtester__metrics-head p { margin-top: .35rem; text-align: left; }
}

@media (max-width: 640px) {
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: .4rem; text-align: center; }
  .asset-backtester__chart-head { align-items: flex-start; }
  .asset-backtester__chart-frame { height: 270px; }
}

@media (max-width: 480px) {
  .asset-backtester { padding-top: calc(var(--nav-h) + 1.4rem); }
  .asset-backtester h1 { font-size: 2.1rem; }
  .asset-backtester__data-badge { max-width: 100%; white-space: normal; }
  .asset-backtester__period-value { display: none; }
  .asset-backtester__table { min-width: 740px; }
  .asset-backtester__table th,
  .asset-backtester__table td { padding: .75rem .7rem; }
  .asset-backtester__table th:first-child { min-width: 128px; }
  .asset-backtester__chart-card,
  .asset-backtester__comparison-card { border-radius: 12px; }
  .asset-backtester__chart-head { display: grid; grid-template-columns: 1fr; }
  .asset-backtester__quote { text-align: left; }
  .asset-backtester__asset-selector label { flex: 1 1 calc(50% - .5rem); }
  .asset-backtester__asset-selector label > span { width: 100%; justify-content: center; }
  .asset-backtester__chart-frame--comparison { height: 360px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .asset-backtester__skeleton { animation: none; }
  .nav-toggle span,
  .mobile-menu { transition: none; }
}