@font-face {
  font-family: "Hack Nerd Font";
  src: url("../fonts/HackNerdFont-Regular.ttf?v=3f310ababf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  unicode-range:
    U+0000-00FF,
    U+0100-024F,
    U+0259,
    U+2000-206F,
    U+20A0-20CF,
    U+2100-214F,
    U+2190-21FF,
    U+2200-22FF,
    U+2300-23FF,
    U+2460-24FF,
    U+2500-257F,
    U+2580-259F,
    U+25A0-25FF,
    U+2600-26FF,
    U+2700-27BF,
    U+E000-F8FF;
}

@font-face {
  font-family: "LXGW WenKai";
  src: url("../fonts/LXGWWenKai.ttf?v=3f310ababf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  unicode-range:
    U+2E80-2EFF,
    U+2F00-2FDF,
    U+3000-303F,
    U+31C0-31EF,
    U+3400-4DBF,
    U+4E00-9FFF,
    U+F900-FAFF,
    U+FF00-FFEF;
}

:root {
  color-scheme: light;
  --paper: #f4efe6;
  --paper-2: #fbf7ef;
  --ink: #211915;
  --muted: #6d5d52;
  --accent: #8f5d35;
  --accent-2: #b88357;
  --accent-3: #d9b474;
  --rule: rgba(52, 35, 24, 0.14);
  --panel: rgba(255, 252, 247, 0.88);
  --shadow: 0 22px 60px rgba(43, 28, 15, 0.08);
  --pixel-border: rgba(52, 35, 24, 0.28);
  --pixel-border-soft: rgba(52, 35, 24, 0.12);
  --pixel-shadow: 5px 6px 0 rgba(33, 25, 21, 0.12);
  --pixel-shadow-strong: 7px 9px 0 rgba(33, 25, 21, 0.16);
  --serif: "Hack Nerd Font", monospace;
  --sans: "Hack Nerd Font", monospace;
  --mono: "Hack Nerd Font", monospace;
}

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

.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;
}

html {
  background:
    radial-gradient(circle at top, rgba(255, 248, 236, 0.96), transparent 42%),
    repeating-linear-gradient(
      90deg,
      rgba(33, 25, 21, 0.028) 0 1px,
      transparent 1px 12px
    ),
    repeating-linear-gradient(
      0deg,
      rgba(33, 25, 21, 0.022) 0 1px,
      transparent 1px 12px
    ),
    linear-gradient(180deg, #efe6d8 0%, var(--paper) 36%, #efe6d9 100%);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(115deg, rgba(143, 93, 53, 0.04), transparent 38%),
    linear-gradient(245deg, rgba(184, 131, 87, 0.05), transparent 34%);
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent);
}

img,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
}

.page {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.article-page {
  width: min(1380px, calc(100vw - 40px));
}

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
}

.site-header h1,
.site-header h2,
.site-header h3 {
  margin: 0;
  line-height: 1.05;
}

.site-heading {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  letter-spacing: -0.04em;
  text-transform: lowercase;
}

.editorial-panel {
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.94), rgba(252, 246, 237, 0.9)),
    radial-gradient(circle at top left, rgba(217, 180, 116, 0.14), transparent 44%);
  border: 1px solid var(--pixel-border-soft);
  border-radius: 14px;
  box-shadow: var(--pixel-shadow);
  backdrop-filter: none;
}

.home-grid,
.listing-grid {
  display: grid;
  gap: 18px;
}

.home-guide {
  display: grid;
  gap: 14px;
}

.home-section,
.listing-section {
  padding: 20px 22px;
}

.home-section + .home-section,
.listing-section + .listing-section {
  border-top: 1px solid var(--rule);
}

.home-section h2,
.listing-section h2,
.listing-section h1 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-family: var(--sans);
}

.site-hero.site-header {
  position: relative;
  display: block;
  margin-bottom: 18px;
  padding: 20px 22px;
  border: 2px solid var(--pixel-border);
  border-bottom: 2px solid var(--pixel-border);
  border-radius: 0;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 251, 244, 0.98), rgba(246, 236, 221, 0.97)),
    repeating-linear-gradient(
      90deg,
      rgba(52, 35, 24, 0.04) 0 2px,
      transparent 2px 14px
    ),
    repeating-linear-gradient(
      0deg,
      rgba(52, 35, 24, 0.03) 0 2px,
      transparent 2px 14px
    ),
    linear-gradient(90deg, rgba(217, 180, 116, 0.08), transparent 22%),
    radial-gradient(circle at top right, rgba(184, 131, 87, 0.16), transparent 34%);
  box-shadow: var(--pixel-shadow-strong);
}

.site-hero.site-header::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(87, 60, 42, 0.12);
  pointer-events: none;
}

.site-hero-grid {
  display: grid;
  grid-template-columns: minmax(280px, 320px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.site-mark-panel {
  display: grid;
  gap: 8px;
  align-content: start;
}

.site-kicker {
  margin: 0;
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  width: fit-content;
  padding: 12px 16px 10px;
  border: 2px solid rgba(87, 60, 42, 0.28);
  border-radius: 0;
  background:
    linear-gradient(180deg, rgba(33, 25, 21, 0.92), rgba(61, 43, 31, 0.93)),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.06) 0 2px,
      transparent 2px 10px
    ),
    radial-gradient(circle at top left, rgba(217, 180, 116, 0.13), transparent 48%);
  color: #f8f0e2;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.05),
    0 0 0 4px rgba(255, 248, 236, 0.78),
    8px 8px 0 rgba(33, 25, 21, 0.14);
  font-family: var(--mono);
  font-size: clamp(2.1rem, 3.4vw, 3rem);
  line-height: 1;
  letter-spacing: -0.08em;
}

.site-mark span:nth-child(2) {
  color: var(--accent-3);
}

.site-hero-copy {
  min-width: 0;
  display: grid;
  align-content: start;
  gap: 16px;
  padding-bottom: 0;
}

.home-page .site-heading {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-status-panel {
  align-self: stretch;
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 14px 14px 12px;
  border: 2px solid rgba(87, 60, 42, 0.22);
  border-radius: 0;
  background:
    linear-gradient(180deg, rgba(255, 251, 245, 0.96), rgba(242, 232, 219, 0.92)),
    repeating-linear-gradient(
      0deg,
      rgba(87, 60, 42, 0.04) 0 2px,
      transparent 2px 12px
    ),
    linear-gradient(90deg, rgba(217, 180, 116, 0.1), transparent 62%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.36),
    6px 6px 0 rgba(33, 25, 21, 0.12);
  font-family: var(--mono);
  font-size: 0.8rem;
  color: rgba(33, 25, 21, 0.84);
}

.site-status-panel p {
  margin: 0;
}

.site-status-label {
  color: var(--muted);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.site-ledger {
  display: grid;
  gap: 6px;
  width: fit-content;
  padding: 10px 12px 9px;
  border: 2px solid rgba(87, 60, 42, 0.16);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(255, 251, 244, 0.9), rgba(248, 238, 226, 0.92)),
    repeating-linear-gradient(
      0deg,
      rgba(87, 60, 42, 0.04) 0 1px,
      transparent 1px 14px
    );
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.55;
  box-shadow: 5px 6px 0 rgba(33, 25, 21, 0.08);
}

.site-ledger p {
  margin: 0;
}

.site-summary-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.summary-chip {
  display: grid;
  gap: 4px;
  padding: 10px 12px 9px;
  border: 2px solid rgba(87, 60, 42, 0.2);
  border-radius: 0;
  background:
    linear-gradient(180deg, rgba(255, 251, 244, 0.94), rgba(244, 234, 219, 0.92)),
    repeating-linear-gradient(
      90deg,
      rgba(87, 60, 42, 0.05) 0 2px,
      transparent 2px 12px
    );
  box-shadow: 4px 4px 0 rgba(33, 25, 21, 0.1);
}

.summary-label {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.summary-chip strong {
  font-family: var(--mono);
  font-size: 1.2rem;
  line-height: 1;
}

.mode-balance-panel {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 2px solid rgba(87, 60, 42, 0.22);
  border-radius: 0;
  background:
    linear-gradient(180deg, rgba(255, 251, 245, 0.96), rgba(242, 232, 219, 0.92)),
    repeating-linear-gradient(
      0deg,
      rgba(87, 60, 42, 0.04) 0 2px,
      transparent 2px 12px
    ),
    linear-gradient(90deg, rgba(217, 180, 116, 0.1), transparent 62%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.36),
    6px 6px 0 rgba(33, 25, 21, 0.12);
}

.mode-balance-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.mode-balance-kicker,
.mode-balance-total {
  margin: 0;
  font-family: var(--mono);
}

.mode-balance-kicker {
  color: var(--muted);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.mode-balance-total {
  font-size: 0.76rem;
}

.mode-balance-track {
  display: flex;
  height: 20px;
  padding: 2px;
  border: 2px solid rgba(87, 60, 42, 0.14);
  background: rgba(255, 248, 236, 0.72);
}

.mode-balance-segment {
  display: block;
  width: max(18px, calc(var(--mode-share, 0) * 100%));
  height: 100%;
}

.mode-balance-segment--code {
  background:
    linear-gradient(180deg, rgba(110, 74, 51, 0.94), rgba(143, 93, 53, 0.94)),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.08) 0 2px,
      transparent 2px 8px
    );
}

.mode-balance-segment--math {
  background:
    linear-gradient(180deg, rgba(224, 183, 112, 0.98), rgba(184, 131, 87, 0.92)),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.08) 0 2px,
      transparent 2px 8px
    );
}

.mode-balance-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
}

.mode-balance-item {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 8px 10px;
  border: 2px solid rgba(87, 60, 42, 0.14);
  background: rgba(255, 249, 240, 0.82);
}

.mode-balance-item dt,
.mode-balance-item dd {
  margin: 0;
  font-family: var(--mono);
}

.mode-balance-item dt {
  color: var(--muted);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.mode-balance-item dd {
  font-size: 1rem;
}

.site-metrics-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.92fr);
  gap: 12px;
}

.stat-panel {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 2px solid rgba(87, 60, 42, 0.2);
  border-radius: 0;
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.98), rgba(244, 234, 219, 0.94)),
    repeating-linear-gradient(
      0deg,
      rgba(87, 60, 42, 0.04) 0 2px,
      transparent 2px 14px
    );
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.32),
    6px 6px 0 rgba(33, 25, 21, 0.1);
}

.stat-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.stat-head h2 {
  margin: 0;
  font-size: 0.92rem;
}

.stat-head p {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  font-family: var(--mono);
}

.theme-map-panel {
  grid-row: span 2;
}

.cluster-ledger {
  display: grid;
  gap: 10px;
}

.cluster-row {
  display: grid;
  gap: 8px;
  padding: 12px 14px;
  border: 2px solid rgba(87, 60, 42, 0.2);
  border-radius: 0;
  background:
    linear-gradient(180deg, rgba(255, 248, 236, 0.98), rgba(238, 220, 198, 0.92)),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.08) 0 2px,
      transparent 2px 10px
    ),
    linear-gradient(90deg, rgba(217, 180, 116, 0.12), transparent 52%);
  box-shadow:
    inset 0 -8px 0 rgba(143, 93, 53, 0.08),
    4px 4px 0 rgba(33, 25, 21, 0.08);
}

.cluster-row-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.cluster-row-name,
.cluster-row-count,
.cluster-row-meta,
.tag-spectrum-label,
.tag-spectrum-value,
.archive-timeline-index,
.archive-timeline-meta span {
  font-family: var(--mono);
}

.cluster-row-name,
.cluster-row-count,
.cluster-row-meta {
  margin: 0;
  font-size: 0.72rem;
}

.cluster-row-name {
  color: var(--ink);
  font-size: 0.88rem;
  text-transform: uppercase;
}

.cluster-row-count {
  color: var(--muted);
}

.cluster-row-meter {
  display: flex;
  height: 16px;
  padding: 2px;
  border: 2px solid rgba(87, 60, 42, 0.12);
  background: rgba(255, 248, 236, 0.72);
}

.cluster-row-segment {
  display: block;
  width: max(12px, calc(var(--cluster-share, 0) * 100%));
  height: 100%;
}

.cluster-row-segment--code {
  background:
    linear-gradient(180deg, rgba(110, 74, 51, 0.94), rgba(143, 93, 53, 0.94)),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.08) 0 2px,
      transparent 2px 8px
    );
}

.cluster-row-segment--math {
  background:
    linear-gradient(180deg, rgba(224, 183, 112, 0.98), rgba(184, 131, 87, 0.92)),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.08) 0 2px,
      transparent 2px 8px
    );
}

.cluster-row-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  color: var(--muted);
}

.tag-spectrum-list {
  display: grid;
  gap: 10px;
}

.tag-spectrum-item {
  display: grid;
  grid-template-columns: minmax(82px, 112px) minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
}

.tag-spectrum-label,
.tag-spectrum-value {
  font-size: 0.74rem;
}

.tag-spectrum-bar {
  display: flex;
  align-items: center;
  height: 14px;
  padding: 2px;
  border: 2px solid rgba(87, 60, 42, 0.12);
  border-radius: 0;
  background: rgba(255, 248, 236, 0.72);
}

.tag-spectrum-fill {
  display: block;
  width: max(12px, calc(var(--tag-fill, 0) * 100%));
  height: 100%;
  border-radius: 0;
  background: var(--tag-color, var(--accent));
  box-shadow: inset 0 -2px 0 rgba(33, 25, 21, 0.18);
}

.activity-heatmap {
  display: grid;
  gap: 12px;
}

.activity-heatmap-range {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.68rem;
  font-family: var(--mono);
}

.activity-heatmap-shell {
  padding: 12px 14px;
  border: 2px solid rgba(87, 60, 42, 0.1);
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.9), rgba(248, 239, 227, 0.82)),
    repeating-linear-gradient(
      90deg,
      rgba(87, 60, 42, 0.026) 0 1px,
      transparent 1px 12px
    );
}

.activity-heatmap-grid {
  display: grid;
  gap: 8px;
  align-items: start;
}

.activity-heatmap-week {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.activity-cell {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(87, 60, 42, 0.1);
  background:
    linear-gradient(180deg, rgba(255, 251, 245, 0.9), rgba(248, 239, 227, 0.82));
  box-shadow:
    inset 0 -2px 0 rgba(87, 60, 42, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.activity-cell--padding {
  visibility: hidden;
}

.activity-cell--level-0 {
  background:
    linear-gradient(180deg, rgba(255, 251, 245, 0.92), rgba(248, 239, 227, 0.84));
}

.activity-cell--level-1 {
  border-color: rgba(210, 168, 110, 0.28);
  background:
    linear-gradient(180deg, rgba(246, 228, 192, 0.9), rgba(235, 211, 168, 0.84));
}

.activity-cell--level-2 {
  border-color: rgba(198, 145, 85, 0.34);
  background:
    linear-gradient(180deg, rgba(234, 197, 137, 0.94), rgba(219, 171, 107, 0.9));
}

.activity-cell--level-3 {
  border-color: rgba(170, 115, 73, 0.42);
  background:
    linear-gradient(180deg, rgba(202, 145, 96, 0.95), rgba(178, 119, 76, 0.92));
}

.activity-cell--level-4 {
  border-color: rgba(137, 90, 57, 0.54);
  background:
    linear-gradient(180deg, rgba(161, 110, 71, 0.96), rgba(132, 86, 56, 0.94));
  box-shadow:
    inset 0 -2px 0 rgba(73, 47, 29, 0.16),
    0 0 0 1px rgba(255, 242, 223, 0.12);
}

.activity-heatmap-date {
  letter-spacing: 0.08em;
}

.home-section-head {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.home-section-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.archive-timeline-item {
  border: 2px solid rgba(87, 60, 42, 0.16);
  border-radius: 0;
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.98), rgba(246, 236, 221, 0.94)),
    repeating-linear-gradient(
      0deg,
      rgba(87, 60, 42, 0.04) 0 2px,
      transparent 2px 14px
    );
  box-shadow: 6px 6px 0 rgba(33, 25, 21, 0.1);
}

.archive-timeline {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.archive-timeline-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 14px 16px;
}

.archive-timeline-item:hover,
.guide-link:hover,
.cluster-row:hover {
  transform: translate(-2px, -2px);
}

.archive-timeline-index {
  color: var(--muted);
  font-size: 0.74rem;
}

.archive-timeline-copy {
  min-width: 0;
}

.archive-timeline-copy a {
  font-family: var(--sans);
  font-size: clamp(1.02rem, 1.7vw, 1.42rem);
  text-decoration: none;
}

.archive-timeline-copy p:last-child {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.archive-timeline-meta {
  display: grid;
  gap: 8px;
  justify-items: end;
}

.archive-timeline-meta span {
  display: inline-flex;
  justify-content: center;
  min-width: 72px;
  padding: 6px 8px;
  border: 2px solid rgba(87, 60, 42, 0.14);
  background: rgba(255, 248, 236, 0.78);
  color: var(--muted);
  font-size: 0.7rem;
}

.card-kicker {
  margin: 0 0 8px;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  font-family: var(--mono);
}

.home-card-list > li {
  padding: 14px 16px;
  border: 2px solid rgba(87, 60, 42, 0.14);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(255, 251, 244, 0.94), rgba(246, 236, 222, 0.92)),
    linear-gradient(90deg, rgba(217, 180, 116, 0.06), transparent 42%);
  box-shadow: 5px 6px 0 rgba(33, 25, 21, 0.08);
}

.home-card-list > li a {
  font-family: var(--mono);
}

.home-card-list > li p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.62;
}

.home-guide h2 {
  margin-bottom: 10px;
}

.home-guide .guide-strip {
  gap: 0;
  border: 2px solid rgba(87, 60, 42, 0.18);
  border-radius: 0;
  overflow: hidden;
  background: rgba(255, 252, 247, 0.78);
  box-shadow: 6px 6px 0 rgba(33, 25, 21, 0.1);
}

.home-guide .guide-link {
  border: 0;
  border-radius: 0;
  min-height: 92px;
  box-shadow: none;
  background:
    linear-gradient(180deg, rgba(255, 251, 245, 0.98), rgba(244, 234, 219, 0.94)),
    repeating-linear-gradient(
      90deg,
      rgba(87, 60, 42, 0.035) 0 1px,
      transparent 1px 14px
    );
}

.home-guide .guide-link + .guide-link {
  border-left: 1px solid rgba(87, 60, 42, 0.16);
}

.home-guide .guide-glyph {
  font-size: 2.7rem;
}

.home-guide .guide-glyph--math {
  font-size: 2.45rem;
}

.card-list,
.pair-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.card-list > li {
  background: rgba(255, 252, 247, 0.72);
  border: 1px solid rgba(87, 60, 42, 0.12);
  border-radius: 20px;
  box-shadow: 0 10px 28px rgba(54, 34, 18, 0.05);
}

.card-list > li {
  padding: 16px 18px;
}

.card-list > li + li {
  margin-top: 12px;
}

.guide-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 74px;
  border-radius: 0;
  border: 2px solid rgba(87, 60, 42, 0.16);
  background:
    linear-gradient(180deg, rgba(255, 251, 245, 0.96), rgba(249, 241, 231, 0.9)),
    repeating-linear-gradient(
      90deg,
      rgba(87, 60, 42, 0.04) 0 2px,
      transparent 2px 12px
    ),
    radial-gradient(circle at top, rgba(184, 131, 87, 0.11), transparent 56%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.36),
    4px 4px 0 rgba(33, 25, 21, 0.1);
  text-decoration: none;
  transition: transform 160ms steps(2, end), box-shadow 160ms steps(2, end);
}

.guide-glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1em;
  font-family: "Hack Nerd Font", monospace;
  font-size: 2.05rem;
  line-height: 1;
  font-weight: 400;
  color: var(--accent);
}

.guide-link--math .guide-glyph {
  color: var(--accent-2);
}

.guide-glyph--math {
  font-size: 1.95rem;
  letter-spacing: -0.02em;
}

.guide-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
}

.card-list span,
.article-meta,
.article-kicker,
.pair-meta {
  color: var(--muted);
  font-family: var(--sans);
}

.article-masthead {
  margin-bottom: 20px;
  padding: 16px 22px 15px;
  background:
    linear-gradient(180deg, rgba(255, 251, 244, 0.98), rgba(249, 241, 231, 0.92)),
    radial-gradient(circle at top left, rgba(184, 131, 87, 0.08), transparent 36%);
}

.article-masthead-topline {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0;
}

.article-masthead-body {
  display: grid;
  grid-template-columns: minmax(0, 1.52fr) minmax(300px, 360px);
  gap: 14px;
  align-items: start;
}

.article-masthead-main {
  min-width: 0;
  display: grid;
  align-content: start;
  gap: 22px;
}

.article-kicker {
  margin: 0 0 10px;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.article-type-pill {
  display: inline-flex;
  padding: 4px 9px;
  border: 1px solid rgba(143, 93, 53, 0.18);
  border-radius: 999px;
  background: rgba(255, 248, 238, 0.92);
  color: var(--accent);
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-type-pill a {
  text-decoration: none;
}

.article-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  align-items: start;
  margin-bottom: 0;
}

.article-heading {
  min-width: 0;
  display: grid;
  gap: 20px;
}

.article-masthead h1 {
  margin: 0;
  font-size: clamp(2rem, 3.6vw, 3.7rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.article-summary {
  margin: 0;
  max-width: 52rem;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--muted);
}

.article-meta {
  display: grid;
  gap: 10px;
  margin: 0;
}

.article-meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding: 16px 0 0;
  border-top: 1px solid rgba(87, 60, 42, 0.08);
}

.article-meta-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  min-height: 0;
  padding: 8px 14px 8px 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  position: relative;
}

.article-meta-chip:not(:last-child) {
  margin-right: 14px;
}

.article-meta-chip:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 9px;
  right: -8px;
  bottom: 9px;
  width: 1px;
  background: rgba(87, 60, 42, 0.1);
}

.article-meta-chip dt {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.article-meta-chip dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.88rem;
}

.article-tag-list,
.article-link-list {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.article-tag-list a,
.article-link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 8px;
  border-radius: 8px;
  background: rgba(255, 246, 235, 0.65);
  text-decoration: none;
  box-shadow: inset 0 0 0 1px rgba(143, 93, 53, 0.08);
}

.article-link-list a {
  max-width: min(42ch, 42vw);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-chart-stack {
  display: grid;
  gap: 10px;
  justify-self: start;
  align-self: start;
  width: min(100%, 332px);
  padding-top: 0;
  padding-bottom: 0;
}

.article-tag-chart,
.article-ratio-chart {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(87, 60, 42, 0.1);
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.96), rgba(251, 244, 235, 0.92)),
    radial-gradient(circle at top right, rgba(184, 131, 87, 0.08), transparent 44%);
}

.article-ratio-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 7px;
}

.article-ratio-kicker,
.article-ratio-total,
.article-tag-label,
.article-tag-value,
.article-ratio-label,
.article-ratio-value {
  font-family: var(--sans);
}

.article-ratio-kicker {
  margin: 0;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.article-ratio-total {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.article-tag-chart-body {
  display: grid;
  grid-template-columns: 136px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.article-tag-pie {
  width: 132px;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, rgba(255, 251, 245, 0.95) 0 31%, transparent 32%),
    conic-gradient(var(--tag-chart-fill));
  box-shadow:
    inset 0 0 0 1px rgba(87, 60, 42, 0.08),
    0 12px 28px rgba(64, 39, 17, 0.08);
}

.article-tag-legend,
.article-ratio-legend {
  display: grid;
  gap: 6px;
}

.article-ratio-legend {
  margin-top: 7px;
}

.article-tag-legend-item,
.article-ratio-legend-item {
  display: grid;
  grid-template-columns: 10px 1fr auto;
  align-items: center;
  gap: 8px;
}

[data-tag-name="..."].article-tag-legend-item {
  opacity: 0.74;
}

[data-tag-name="..."] .article-tag-swatch {
  box-shadow: inset 0 0 0 1px rgba(143, 93, 53, 0.18);
}

.article-tag-swatch,
.article-ratio-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.article-tag-swatch {
  background: var(--tag-swatch);
}

[data-ratio-kind="code"] .article-ratio-dot {
  background: #7a5b45;
}

[data-ratio-kind="math"] .article-ratio-dot {
  background: #c8a264;
}

.article-tag-label,
.article-ratio-label {
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.article-tag-value,
.article-ratio-value {
  font-size: 0.78rem;
  color: var(--ink);
}

.article-ratio-band {
  display: flex;
  width: 100%;
  height: 14px;
  overflow: hidden;
  border-radius: 999px;
  box-shadow:
    inset 0 0 0 1px rgba(87, 60, 42, 0.08),
    inset 0 10px 18px rgba(255, 255, 255, 0.14);
  background: rgba(255, 252, 247, 0.6);
}

.article-ratio-band-segment {
  display: block;
  min-width: 6px;
}

[data-ratio-kind="code"].article-ratio-band-segment {
  background: linear-gradient(90deg, #5f4636, #9e7a61);
}

[data-ratio-kind="math"].article-ratio-band-segment {
  background: linear-gradient(90deg, #c69d62, #e1c996);
}

.article-meta dd {
  margin: 5px 0 0;
  font-size: 0.88rem;
}

.article-meta-strip .article-meta-chip dd {
  margin: 0;
}

.article-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.article-tag-list a {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(143, 93, 53, 0.08);
  text-decoration: none;
}

.article-body {
  min-width: 0;
}

.article-reading-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.92fr);
  gap: 18px;
  align-items: start;
}

.article-reading-grid--solo {
  grid-template-columns: minmax(0, 1fr);
}

.article-source-panel {
  position: relative;
  padding: 18px 22px 16px;
  min-width: 0;
  background:
    linear-gradient(180deg, rgba(249, 243, 233, 0.98), rgba(255, 252, 247, 0.95)),
    radial-gradient(circle at top left, rgba(184, 131, 87, 0.07), transparent 36%);
}

.source-stream,
.pair-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.source-stream {
  padding-bottom: clamp(220px, 34vh, 360px);
}

.pair-surface-label {
  margin-bottom: 12px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.pair-source-segment {
  position: relative;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 14px;
  padding: 10px 0;
  transition:
    background-color 240ms cubic-bezier(0.22, 1, 0.36, 1),
    color 240ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 240ms cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 240ms cubic-bezier(0.22, 1, 0.36, 1);
}

.pair-source-segment + .pair-source-segment {
  border-top: 1px dashed rgba(143, 93, 53, 0.24);
}

.pair-source-segment.is-active {
  background: rgba(255, 247, 235, 0.7);
  box-shadow: inset 0 0 0 1px rgba(143, 93, 53, 0.08);
}

.pair-source-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin-top: 2px;
  border: 1px solid rgba(143, 93, 53, 0.18);
  border-radius: 999px;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition:
    background-color 220ms cubic-bezier(0.22, 1, 0.36, 1),
    color 220ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 220ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.pair-source-marker--silent {
  border-color: rgba(143, 93, 53, 0.08);
  background: transparent;
  box-shadow: none;
}

.pair-source-segment.is-active .pair-source-marker {
  background: var(--accent);
  color: #fffaf3;
  transform: scale(1.04);
}

.pair-source-body pre,
.pair-source-body code {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(0.76rem, 0.84vw, 0.88rem);
  line-height: 1.54;
  font-weight: 600;
}

.pair-source-body pre,
.pair-explanation pre {
  overflow: visible;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.code-block {
  margin: 0;
  padding: 13px 15px;
  border: 1px solid rgba(87, 60, 42, 0.025);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(250, 245, 236, 0.38), rgba(255, 252, 247, 0.28)),
    radial-gradient(circle at top right, rgba(217, 180, 116, 0.02), transparent 42%);
  color: #2f2218;
  box-shadow: none;
}

.pair-source-body .code-block {
  box-shadow: none;
}

.code-block code {
  color: inherit;
}

.token {
  color: #2f2218;
}

.token--keyword,
.token--decorator {
  color: #a7662f;
}

.token--builtin {
  color: #2f7a6a;
}

.token--string {
  color: #b45a45;
}

.token--number {
  color: #7a5ca7;
}

.token--comment {
  color: rgba(87, 60, 42, 0.58);
  font-style: italic;
}

.token--function {
  color: #8f5d35;
}

.token--operator,
.token--punctuation {
  color: rgba(47, 34, 24, 0.82);
}

.pair-source-segment--math .pair-source-body .katex-display {
  margin: 0;
  font-size: clamp(0.94rem, 1.25vw, 1.12rem);
  overflow: visible;
}

.pair-stream {
  display: grid;
  gap: 10px;
}

.article-notes-panel {
  position: relative;
  min-height: 320px;
}

.pair-unit {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(280px, 1fr);
  gap: 16px;
  align-items: start;
  transition: none;
}

.pair-thread {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  min-height: 100%;
  padding-top: 14px;
}

.pair-thread-line {
  width: 1px;
  min-height: 100%;
  flex: 1 1 auto;
  background: linear-gradient(180deg, rgba(143, 93, 53, 0.32), rgba(143, 93, 53, 0.1));
}

.pair-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(143, 93, 53, 0.2);
  border-radius: 999px;
  background: rgba(255, 249, 240, 0.98);
  color: var(--accent);
  box-shadow: 0 8px 24px rgba(55, 31, 14, 0.08);
  font-family: var(--sans);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.pair-note-segment {
  position: relative;
  min-width: 0;
  padding: 18px 20px 16px;
  border: 1px solid rgba(87, 60, 42, 0.12);
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.98), rgba(254, 249, 241, 0.94)),
    radial-gradient(circle at top right, rgba(143, 93, 53, 0.05), transparent 32%);
  box-shadow: 0 10px 26px rgba(64, 39, 17, 0.05);
  transition:
    border-color 240ms cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 240ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 200ms ease;
}

.pair-note-segment--compact .pair-explanation {
  font-size: 0.88rem;
  line-height: 1.68;
}

.pair-unit.is-active .pair-note-segment {
  border-color: rgba(143, 93, 53, 0.34);
  box-shadow: 0 18px 40px rgba(64, 39, 17, 0.08);
}

.pair-unit.is-active .pair-thread-line,
.focus-note-card .pair-thread-line {
  background: linear-gradient(180deg, rgba(143, 93, 53, 0.72), rgba(184, 131, 87, 0.26));
}

.pair-unit.is-active .pair-badge,
.focus-note-card .pair-badge {
  background: var(--accent);
  color: #fffaf3;
}

.pair-stream.is-hidden {
  visibility: hidden;
  pointer-events: none;
}

.focus-note-layer[hidden] {
  display: none;
}

.focus-note-layer {
  position: absolute;
  inset: 0 0 auto 0;
  z-index: 2;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.focus-note-card {
  display: grid;
  grid-template-columns: 56px minmax(280px, 1fr);
  gap: 16px;
  align-items: start;
  transform: translate3d(0, var(--focus-offset, 0px), 0);
  transition:
    transform 280ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 180ms ease;
  background: transparent;
  border: 0;
  box-shadow: none;
  padding: 0;
  will-change: transform;
}

.focus-note-card .pair-note-segment {
  border-color: rgba(143, 93, 53, 0.34);
  box-shadow: 0 18px 40px rgba(64, 39, 17, 0.08);
}

.pair-explanation {
  font-size: 0.92rem;
  color: rgba(42, 29, 20, 0.92);
}

.pair-explanation .katex,
.pair-source-body .katex {
  font-size: 1em;
}

.pair-explanation .katex .katex-mathml,
.pair-source-body .katex .katex-mathml {
  display: none !important;
}

.pair-explanation .katex .katex-html,
.pair-source-body .katex .katex-html {
  display: inline-block;
}

.pair-explanation h1,
.pair-explanation h2,
.pair-explanation h3,
.pair-explanation h4 {
  margin: 1.2em 0 0.5em;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.pair-explanation p,
.pair-explanation ul,
.pair-explanation ol,
.pair-explanation blockquote,
.pair-explanation pre,
.pair-explanation table {
  margin: 0.8em 0;
}

.pair-explanation .commentary-math-block {
  margin: 0.8em 0;
}

.pair-explanation .commentary-math-block .katex {
  display: block;
}

.pair-explanation .commentary-math-block .katex-display {
  margin: 0;
  overflow: visible;
}

.pair-explanation ul,
.pair-explanation ol {
  padding-left: 1.3rem;
}

.pair-explanation li + li {
  margin-top: 0.28rem;
}

.pair-explanation a {
  color: var(--accent);
}

.pair-explanation strong {
  color: var(--ink);
}

.pair-explanation code:not(pre code) {
  padding: 0.15em 0.42em;
  border-radius: 0.45rem;
  background: rgba(143, 93, 53, 0.08);
  font-family: var(--mono);
  font-size: 0.9em;
}

.pair-explanation blockquote {
  padding: 0.1rem 0 0.1rem 1rem;
  border-left: 2px solid rgba(143, 93, 53, 0.28);
  color: var(--muted);
}

.pair-explanation table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.94rem;
}

.pair-explanation th,
.pair-explanation td {
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid rgba(87, 60, 42, 0.12);
}

.pair-explanation > :first-child {
  margin-top: 0;
}

.pair-explanation > :last-child {
  margin-bottom: 0;
}

.article-footer {
  margin-top: 24px;
  color: var(--muted);
  font-family: var(--sans);
}

@media (max-width: 900px) {
  .site-hero.site-header {
    padding: 16px;
  }

  .site-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
    align-items: start;
  }

  .site-mark {
    width: fit-content;
  }

  .site-summary-strip,
  .site-metrics-grid,
  .mode-balance-meta {
    grid-template-columns: 1fr;
  }

  .site-ledger {
    width: min(100%, 100%);
  }

  .activity-heatmap-grid {
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .article-masthead {
    padding: 16px;
  }

  .article-masthead-body {
    grid-template-columns: 1fr;
    justify-items: start;
    align-items: start;
  }

  .article-masthead-main {
    gap: 18px;
  }

  .article-hero-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .article-chart-stack {
    width: min(100%, 320px);
    align-self: start;
    padding-top: 0;
  }

  .article-reading-grid {
    grid-template-columns: 1fr;
  }

  .pair-unit {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 10px;
  }

  .pair-thread {
    flex-direction: row;
    justify-content: flex-start;
    min-height: 0;
    padding-top: 0;
  }

  .pair-thread-line {
    width: 100%;
    min-height: 0;
    height: 1px;
  }

  .focus-note-card {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 10px;
  }
}

@media (max-width: 640px) {
  .page {
    width: min(100vw - 20px, 1120px);
    padding-top: 18px;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .home-section,
  .listing-section,
  .article-masthead,
  .article-source-panel,
  .pair-note-segment {
    padding: 16px;
  }

  .pair-source-segment {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 10px;
  }

  .summary-chip,
  .stat-panel,
  .archive-timeline-item {
    padding: 14px;
  }

  .archive-timeline-item {
    grid-template-columns: 1fr;
  }

  .archive-timeline-meta {
    justify-items: start;
    grid-template-columns: repeat(2, minmax(0, auto));
  }

  .article-meta-chip {
    width: 100%;
    border-radius: 18px;
  }

  .article-tag-chart-body {
    grid-template-columns: 1fr;
  }

}

@media (prefers-reduced-motion: reduce) {
  .pair-source-segment,
  .pair-note-segment,
  .focus-note-card {
    transition: none;
  }
}