:root {
  --bg: #faf9f5;
  --surface: #f5f0e8;
  --surface-warm: #efe9de;
  --fg: #141413;
  --fg-2: #000000;
  --muted: #6c6a64;
  --meta: #8e8b82;
  --border: #e6dfd8;
  --border-soft: #ebe6df;
  --accent: #cc785c;
  --accent-on: #ffffff;
  --accent-hover: #a9583e;
  --success: #5db872;
  --warn: #d4a017;
  --danger: #c64545;
  --font-display: "Cormorant Garamond", Georgia, "Times New Roman", ui-serif, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", system-ui, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
  --text-xs: 12px;
  --text-sm: 13px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 28px;
  --text-3xl: 40px;
  --text-4xl: 56px;
  --leading-body: 1.65;
  --leading-tight: 1.08;
  --tracking-display: -0.02em;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --section-y-desktop: 96px;
  --section-y-tablet: 64px;
  --section-y-phone: 48px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 9999px;
  --elev-raised: 0 4px 16px rgba(20, 20, 19, 0.06);
  --focus-ring: 0 0 0 3px rgba(204, 120, 92, 0.20);
  --motion-fast: 150ms;
  --motion-base: 220ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);
  --container-max: 1200px;
  --container-gutter-desktop: 48px;
  --container-gutter-tablet: 24px;
  --container-gutter-phone: 20px;
}

:root[data-theme="dark"] {
  --bg: #0d0d0d;
  --surface: #1a1a1a;
  --surface-warm: #111111;
  --fg: #f5f5f5;
  --fg-2: #ffffff;
  --muted: #b7b7b7;
  --meta: #858585;
  --border: #2a2a2a;
  --border-soft: #242424;
  --accent: #10a37f;
  --accent-on: #ffffff;
  --accent-hover: #35c99f;
  --danger: #ff6b70;
  --font-display: "Source Serif 4", Georgia, ui-serif, serif;
  --focus-ring: 0 0 0 3px rgba(16, 163, 127, 0.18);
  --elev-raised: 0 10px 30px rgba(0, 0, 0, 0.36);
}

:root[lang^="zh"] {
  --font-display: "Source Serif 4", "Noto Serif SC", "Source Han Serif SC", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, system-ui, sans-serif;
  --tracking-display: 0;
}

html {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: var(--leading-body);
  scroll-behavior: smooth;
}

body {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg) 72%, var(--surface) 100%);
  color: var(--fg);
  min-width: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

/* Visible keyboard focus for every interactive control (reuses --focus-ring).
   :where() keeps specificity at 0 so each control's own radius shapes the ring. */
:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.page-shell,
body {
  min-height: 100vh;
  min-height: 100dvh;
}

.container {
  width: min(var(--container-max), calc(100% - var(--container-gutter-desktop) * 2));
  margin: 0 auto;
}

.content {
  background: transparent;
}

.site-header-wrap {
  height: 73px;
}

.site-header-shell {
  background: var(--bg);
  background-color: var(--bg);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: none;
  color: var(--fg);
  height: auto;
  line-height: normal;
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
}

.nav-row {
  align-items: center;
  background: transparent;
  background-color: transparent;
  color: var(--fg);
  display: grid;
  gap: var(--space-8);
  grid-template-columns: minmax(180px, 1fr) minmax(0, auto) auto;
  min-height: 72px;
}

.brand-logo {
  align-items: center;
  display: flex;
  height: auto;
  left: auto;
  position: static;
  transform: none;
}

.brand-lockup {
  align-items: center;
  display: inline-flex;
  gap: var(--space-3);
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.brand-mark img,
.brand-mark svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-name {
  display: grid;
  gap: 0;
  line-height: 1.2;
}

.brand-name strong {
  font-size: var(--text-base);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-name span {
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav {
  align-items: center;
  background: transparent;
  background-color: transparent;
  box-shadow: none;
  display: inline-flex;
  gap: var(--space-2);
  height: auto;
  justify-self: center;
  line-height: normal;
  width: auto;
}

.site-nav.hide-on-med-and-down {
  display: inline-flex !important;
}

.site-nav a {
  border-radius: var(--radius-pill);
  color: var(--muted);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  padding: 10px 12px;
  transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}

.site-nav a:hover,
.site-nav a.is-active {
  background: var(--surface);
  color: var(--fg);
}

.nav-actions,
.utility-actions {
  align-items: center;
  display: inline-flex;
  gap: var(--space-1);
  justify-self: end;
}

.nav-utility,
.lang-switch,
.theme-toggle {
  align-items: center;
  appearance: none;
  background: var(--surface-warm);
  background-color: var(--surface-warm);
  border: 1px solid var(--border);
  border-radius: 50%;
  box-sizing: border-box;
  color: var(--muted);
  display: inline-flex;
  flex: 0 0 34px;
  height: 34px;
  justify-content: center;
  line-height: 1;
  min-height: 34px;
  min-width: 34px;
  padding: 0;
  text-align: center;
  white-space: nowrap;
  width: 34px;
}

.nav-utility:hover,
.lang-switch:hover,
.theme-toggle:hover {
  background: var(--surface-warm);
  background-color: var(--surface-warm);
  border-color: var(--border);
  color: var(--fg);
  transform: translateY(-1px);
}

.nav-utility:active,
.lang-switch:active,
.theme-toggle:active {
  transform: translateY(0) scale(0.96);
}

#headNav.site-header-shell,
.site-header-wrap nav.site-header-shell,
#headNav.site-header-shell.nav-transparent {
  background: var(--bg) !important;
  background-color: var(--bg) !important;
  background-image: none !important;
  box-shadow: none !important;
  color: var(--fg);
}

#navContainer.nav-row,
.site-header-shell .nav-wrapper,
.site-header-shell .site-nav {
  background: transparent !important;
  background-color: transparent !important;
  background-image: none !important;
  box-shadow: none !important;
}

.site-header-shell .site-nav {
  height: auto !important;
  line-height: normal !important;
  width: auto !important;
}

@supports (background: color-mix(in oklab, white, black)) {
  #headNav.site-header-shell,
  .site-header-wrap nav.site-header-shell,
  #headNav.site-header-shell.nav-transparent {
    background: color-mix(in oklab, var(--bg), transparent 4%) !important;
    border-bottom-color: color-mix(in oklab, var(--border), transparent 24%);
  }

  .nav-utility,
  .lang-switch,
  .theme-toggle {
    background: color-mix(in oklab, var(--bg), var(--surface-warm) 50%);
  }

  .nav-utility:hover,
  .lang-switch:hover,
  .theme-toggle:hover {
    border-color: color-mix(in oklab, var(--border), var(--fg) 18%);
  }
}

.lang-switch {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
}

.theme-toggle {
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
}

.nav-utility i {
  font-size: 13px;
}

.icon-svg {
  display: block;
  flex-shrink: 0;
}

.site-mobile-trigger {
  display: none;
}

.site-mobile-nav {
  background: var(--surface-warm);
  color: var(--fg);
  padding: var(--space-6);
  width: min(360px, 88vw);
}

.mobile-nav-head {
  border-bottom: 1px solid var(--border-soft);
  display: grid;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
}

.mobile-nav-head p {
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin: 0;
}

.mobile-nav-list,
.mobile-secondary-links {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-6) 0 0;
}

.mobile-nav-list a,
.mobile-secondary-links a {
  border-radius: var(--radius-sm);
  color: var(--fg);
  display: block;
  padding: 10px 12px;
}

.mobile-nav-list a:hover,
.mobile-secondary-links a:hover {
  background: var(--surface);
}

.mobile-nav-actions {
  align-items: center;
  display: inline-flex;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.site-page-main {
  padding: 0 0 var(--section-y-desktop);
}

.hero {
  display: grid;
  gap: var(--space-16);
  grid-template-columns: minmax(0, 1.08fr) 420px;
  padding: 88px 0 76px;
}

.hero-narrow {
  max-width: 860px;
  padding: 84px 0 56px;
}

.eyebrow {
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-4);
  text-transform: uppercase;
}

.display-title {
  color: var(--fg);
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 600;
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-tight);
  margin: 0;
  max-width: 900px;
  text-wrap: pretty;
}

.page-title {
  color: var(--fg);
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0;
  max-width: 860px;
  text-wrap: pretty;
}

.lead {
  color: var(--muted);
  font-size: var(--text-lg);
  line-height: 1.6;
  margin: var(--space-6) 0 0;
  max-width: 760px;
  text-wrap: pretty;
}

.hero-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.btn {
  align-items: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  font-size: var(--text-sm);
  font-weight: 500;
  justify-content: center;
  line-height: 1;
  min-height: 42px;
  padding: 0 16px;
  transition: background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard), transform var(--motion-fast) var(--ease-standard);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--fg-2);
}

/* Light (cream) theme: primary CTA uses the coral accent (dark theme keeps ink fill) */
:root[data-theme="light"] .btn-primary {
  background: var(--accent);
  color: var(--accent-on);
}

:root[data-theme="light"] .btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: color-mix(in oklab, var(--bg), var(--surface-warm) 45%);
  border-color: var(--border);
  color: var(--fg);
}

.btn-secondary:hover {
  background: var(--surface-warm);
}

.hero-panel,
.sidebar-panel,
.contact-card,
.card {
  background: var(--surface-warm);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.panel-title,
.sidebar-panel h2,
.sidebar-panel h3,
.contact-card h3,
.card h3 {
  color: var(--fg);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 var(--space-4);
}

.hero-panel p,
.sidebar-panel p,
.card p,
.contact-card p {
  color: var(--muted);
  margin: 0;
}

.decision-loop,
.summary-list {
  display: grid;
  gap: var(--space-4);
}

.loop-step {
  align-items: start;
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 32px 1fr;
  padding: var(--space-4);
}

.loop-step span,
.path-step span,
.metric strong {
  color: var(--accent);
  font-family: var(--font-mono);
}

.loop-step span {
  align-items: center;
  background: var(--surface);
  border-radius: 50%;
  display: grid;
  font-size: var(--text-xs);
  height: 28px;
  place-items: center;
  width: 28px;
}

.loop-step strong,
.summary-item strong {
  color: var(--fg);
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: 2px;
}

.loop-step p,
.summary-item span {
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.55;
  margin: 0;
}

.section {
  padding: var(--section-y-desktop) 0;
}

.section.compact {
  padding: var(--space-16) 0;
}

.section-tinted {
  background: var(--surface-warm);
}

.section-head {
  align-items: end;
  display: grid;
  gap: var(--space-12);
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.55fr);
  margin-bottom: var(--space-8);
}

.section-head h2 {
  color: var(--fg);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.2;
  margin: 0;
}

.section-head p {
  color: var(--muted);
  font-size: var(--text-base);
  line-height: 1.65;
  margin: 0;
}

.card-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  transition: box-shadow var(--motion-base) var(--ease-standard), transform var(--motion-base) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--elev-raised);
  transform: translateY(-2px);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.chip,
.archive-row .tag {
  align-items: center;
  border-radius: var(--radius-pill);
  display: inline-flex;
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1;
}

.chip {
  background: var(--surface);
  color: var(--muted);
  min-height: 27px;
  padding: 0 10px;
}

.chip-teal {
  background: color-mix(in oklab, var(--accent), var(--bg) 88%);
  color: var(--accent-hover);
}

.archive-list {
  border-top: 1px solid var(--border);
  display: grid;
}

.longform-list {
  border-top: 1px solid var(--border);
  display: grid;
  margin-bottom: var(--space-8);
}

.longform-card {
  align-items: start;
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 180px minmax(0, 1fr) auto;
  padding: var(--space-6) 0;
}

.longform-mark {
  align-items: center;
  background: linear-gradient(135deg, color-mix(in oklab, var(--accent), var(--bg) 84%), var(--surface-warm));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  color: var(--accent-hover);
  display: flex;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  justify-content: center;
  min-height: 104px;
  padding: var(--space-4);
  text-align: center;
}

.longform-actions {
  justify-content: flex-end;
  margin-top: 0;
}

.archive-row {
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 172px minmax(0, 1fr) 190px;
  padding: var(--space-6) 0;
}

.archive-row.has-preview {
  align-items: start;
  grid-template-columns: 220px minmax(0, 1fr) 178px;
}

.archive-row .meta {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
}

.archive-row h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 var(--space-2);
}

.archive-row p {
  color: var(--muted);
  font-size: var(--text-base);
  line-height: 1.6;
  margin: 0;
  max-width: 680px;
}

.archive-row .tag {
  align-self: start;
  border: 1px solid var(--border);
  color: var(--muted);
  justify-self: end;
  padding: 7px 10px;
  white-space: nowrap;
}

.archive-row .summary-stack {
  display: grid;
  gap: var(--space-2);
}

.archive-row .summary-stack p:last-child {
  font-size: var(--text-sm);
}

.archive-row-link {
  color: var(--fg);
  transition: color var(--motion-fast) var(--ease-standard);
}

.archive-row-link:hover {
  color: var(--accent);
}

.post-preview {
  background: linear-gradient(135deg, color-mix(in oklab, var(--accent), var(--bg) 82%), transparent 58%), linear-gradient(180deg, var(--surface-warm), var(--surface));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  min-height: 132px;
  overflow: hidden;
  position: relative;
}

.post-preview::before,
.post-preview::after {
  background: color-mix(in oklab, var(--bg), transparent 18%);
  border: 1px solid color-mix(in oklab, var(--accent), var(--border) 54%);
  content: "";
  position: absolute;
}

.post-preview::before {
  border-radius: 12px;
  height: 42px;
  inset: 20px 24px auto 24px;
}

.post-preview::after {
  border-radius: 50%;
  bottom: 20px;
  height: 42px;
  right: 24px;
  width: 72px;
}

.post-preview span {
  bottom: 22px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  left: 24px;
  position: absolute;
}

.card .post-preview {
  margin-bottom: var(--space-5);
  min-height: 150px;
}

.post-preview-image {
  background: var(--surface);
}

.post-preview-image::before,
.post-preview-image::after {
  display: none;
}

.post-preview-image img {
  display: block;
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.preview-diagram::before {
  box-shadow: 0 54px 0 -1px color-mix(in oklab, var(--accent), var(--bg) 78%), 96px 54px 0 -1px color-mix(in oklab, var(--fg), var(--bg) 88%);
}

.preview-chart::before {
  background: var(--border);
  border: 0;
  box-shadow: 38px -16px 0 3px var(--accent), 84px -34px 0 3px var(--muted), 132px -22px 0 3px var(--accent-hover);
  height: 1px;
  inset: auto 24px 50px 24px;
}

.preview-grid::before {
  background: linear-gradient(90deg, transparent 31%, var(--border) 31% 32%, transparent 32% 64%, var(--border) 64% 65%, transparent 65%), linear-gradient(180deg, transparent 31%, var(--border) 31% 32%, transparent 32% 64%, var(--border) 64% 65%, transparent 65%), color-mix(in oklab, var(--bg), transparent 12%);
  border-radius: 10px;
  height: 88px;
  inset: 20px 24px auto 24px;
}

.split-panel {
  align-items: start;
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 0.72fr 1fr;
}

.metric-strip {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: var(--space-8);
}

.metric {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.metric strong {
  display: block;
  font-size: var(--text-xl);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  line-height: 1.2;
}

.metric span {
  color: var(--muted);
  display: block;
  font-size: var(--text-sm);
  line-height: 1.5;
  margin-top: var(--space-2);
}

/* Profile hero (GitHub-style) */
.profile-hero {
  padding: var(--space-16) 0;
}

.about-hero {
  align-items: center;
  display: grid;
  gap: var(--space-8);
  grid-template-columns: minmax(240px, 340px) minmax(0, 1fr);
}

.about-hero-avatar {
  aspect-ratio: 1;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  overflow: hidden;
  width: 100%;
}

.about-hero-avatar img {
  display: block;
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.about-hero-copy {
  min-width: 0;
}

.profile-layout {
  display: grid;
  gap: var(--space-12);
  grid-template-columns: minmax(0, 260px) 1fr;
}

.profile-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.profile-avatar {
  border-radius: 50%;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 1;
  border: 1px solid var(--border-soft);
}

.profile-avatar img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.profile-name {
  color: var(--fg);
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
}

.profile-handle {
  color: var(--muted);
  font-size: var(--text-lg);
  font-weight: 400;
  margin: 0;
}

.profile-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.profile-intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.profile-tagline {
  color: var(--fg);
  font-size: var(--text-lg);
  line-height: 1.5;
  margin: 0;
  font-weight: 500;
}

.profile-bio {
  color: var(--muted);
  font-size: var(--text-base);
  line-height: 1.6;
  margin: 0;
}

.profile-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  align-items: center;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--muted);
  font-size: var(--text-sm);
}

.stat-icon {
  flex-shrink: 0;
  fill: currentColor;
  opacity: 0.7;
}

.stat-item strong {
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.stat-item span {
  color: var(--muted);
}

.contribution-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contribution-title {
  color: var(--fg);
  font-size: var(--text-sm);
  font-weight: 600;
  margin: 0;
}

.contribution-count {
  color: var(--muted);
  font-weight: 400;
}

.activity-summary {
  margin: 0;
  color: var(--fg);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

.contribution-graph {
  display: flex;
  gap: 3px;
  overflow-x: auto;
  padding: 4px 0;
}

.contribution-column {
  display: flex;
  flex: 0 0 11px;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.activity-month {
  height: 20px;
  white-space: nowrap;
  color: var(--muted);
  font-size: 10px;
}

.contribution-column:last-child .activity-month {
  align-self: flex-end;
}

.contribution-cell,
.contribution-padding {
  display: block;
  flex: 0 0 11px;
  width: 11px;
  height: 11px;
  border-radius: 2px;
}

.contribution-cell:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 1px;
}

.contribution-cell.level-0 {
  background: var(--surface);
  border: 1px solid var(--border-soft);
}

.contribution-cell.level-1 {
  background: color-mix(in oklab, var(--accent) 35%, var(--surface));
}

.contribution-cell.level-2 {
  background: color-mix(in oklab, var(--accent) 55%, var(--surface));
}

.contribution-cell.level-3 {
  background: color-mix(in oklab, var(--accent) 78%, var(--surface));
}

.contribution-cell.level-4 {
  background: var(--accent);
}

.contribution-legend {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  color: var(--muted);
}

.contribution-note {
  color: var(--muted);
  font-size: var(--text-xs);
  margin: 0;
}

.activity-recent-title {
  font-family: inherit;
  font-size: var(--text-sm);
  margin: 12px 0 0;
}

.writing-period-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.writing-period-controls .btn {
  font-size: var(--text-xs);
  padding: 7px 10px;
}

.writing-period-controls button:disabled {
  opacity: 0.4;
  cursor: default;
}

.activity-recent {
  margin: 0;
  padding: 0;
  list-style: none;
}

.activity-recent li {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.activity-recent time,
.activity-repo {
  color: var(--muted);
  font-size: var(--text-xs);
}

.activity-recent a,
.activity-repo {
  display: block;
  overflow-wrap: anywhere;
}

.profile-main {
  min-width: 0;
}

@media (max-width: 480px) {
  .contribution-column {
    flex: 1 0 7px;
  }

  .contribution-column .contribution-cell,
  .contribution-column .contribution-padding {
    width: 100%;
  }
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.filter-bar {
  align-items: center;
  display: flex;
  gap: var(--space-4);
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.filter-group {
  align-items: center;
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filter-button {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--muted);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  min-height: 36px;
  padding: 0 13px;
  transition: background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}

.filter-button:hover,
.filter-button.is-active {
  background: color-mix(in oklab, var(--accent), var(--bg) 91%);
  border-color: color-mix(in oklab, var(--accent), var(--border) 60%);
  color: var(--accent-hover);
}

.filter-button:active {
  transform: translateY(1px);
}

.search-field {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--fg);
  min-height: 42px;
  outline: none;
  padding: 0 13px;
  transition: border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);
  width: 280px;
}

.search-field:focus,
.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

.path-map {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: var(--space-8);
}

.path-step {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  min-height: 150px;
  padding: var(--space-5);
  position: relative;
}

.path-step::after {
  background: var(--border);
  content: "";
  height: 1px;
  position: absolute;
  right: -14px;
  top: 28px;
  width: 24px;
}

.path-step:last-child::after {
  display: none;
}

.path-step strong {
  color: var(--fg);
  display: block;
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.3;
  margin: var(--space-3) 0 var(--space-2);
}

.path-step p {
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.55;
  margin: 0;
}

.contact-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 0.85fr 1fr;
}

.field {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.field label {
  color: var(--fg);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.field input,
.field textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--fg);
  outline: none;
  padding: 12px 14px;
  transition: border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);
  width: 100%;
}

.field textarea {
  min-height: 132px;
  resize: vertical;
}

.contact-preview {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  min-height: 220px;
  white-space: pre-wrap;
}

.site-footer {
  background: var(--surface-warm);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: var(--text-sm);
  padding: var(--space-8) 0;
}

.footer-row {
  align-items: center;
  display: flex;
  gap: var(--space-6);
  justify-content: space-between;
}

.footer-row + .footer-row {
  margin-top: var(--space-3);
}

.footer-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-links a {
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--fg);
}

.secondary-links {
  font-size: var(--text-xs);
}

.archive-utilities,
.page-note {
  margin-top: var(--space-8);
}

.archive-utilities .footer-links {
  gap: var(--space-3);
}

.archive-utilities a {
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--muted);
  padding: 7px 10px;
}

.archive-utilities a:hover {
  background: var(--surface);
  color: var(--fg);
}

.quiet-callout {
  background: var(--surface-warm);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  display: grid;
  gap: var(--space-4);
  padding: var(--space-6);
}

.quiet-callout p,
.page-note p {
  color: var(--muted);
  margin: 0;
}

.pd-header {
  margin-top: 0;
}

.post-cover {
  min-height: 260px;
}

/* Typographic post header (replaces the legacy photo banner) */
.post-hero {
  padding: 72px 0 0;
}

.post-hero .eyebrow {
  margin-bottom: var(--space-4);
}

.post-hero .page-title {
  max-width: 900px;
}

.post-meta {
  align-items: center;
  color: var(--meta);
  display: flex;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.post-meta .dot {
  opacity: 0.5;
}

.post-hero-tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-left: var(--space-2);
}

.post-hero-tags .chip {
  color: var(--muted);
  font-family: var(--font-body);
  transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}

.post-hero-tags .chip:hover {
  background: var(--surface);
  color: var(--fg);
}

.post-hero-rule {
  border: 0;
  border-top: 1px solid var(--border);
  margin: var(--space-8) 0 var(--space-4);
}

/* Previous / next post navigation (quiet text cards) */
.post-nav {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr 1fr;
  margin-top: var(--space-12);
}

.post-nav-card {
  background: var(--surface-warm);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  display: grid;
  gap: var(--space-2);
  padding: var(--space-5);
  transition: border-color var(--motion-base) var(--ease-standard), transform var(--motion-base) var(--ease-standard);
}

.post-nav-card:hover {
  border-color: var(--border);
  transform: translateY(-2px);
}

.post-nav-card-next {
  text-align: right;
}

.post-nav-label {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.post-nav-title {
  color: var(--fg);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.4;
}

.bg-cover::before {
  background: linear-gradient(180deg, rgba(16, 16, 18, 0.12) 0%, rgba(16, 16, 18, 0.28) 100%);
}

.bg-cover .description,
.post-title {
  color: #ffffff !important;
}

.post-container,
.content .container {
  width: min(var(--container-max), calc(100% - var(--container-gutter-desktop) * 2));
}

#artDetail .card,
.toc-widget,
.prev-next {
  background: var(--surface-warm);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: none;
}

#artDetail .card .card-content,
.toc-widget .toc-title {
  color: var(--fg);
}

#artDetail .tag-cate .chip,
#artDetail .tag_share .chip,
.article-tags .chip,
.article-tag .chip {
  background-image: none;
  background: var(--surface);
  color: var(--muted);
  height: auto;
  line-height: 1.35;
  padding: 7px 12px;
  vertical-align: top;
  white-space: normal;
}

#articleContent,
#articleContent p,
#articleContent li,
#articleContent td {
  color: var(--fg);
}

#articleContent a {
  color: var(--accent);
}

#articleContent img {
  border-radius: var(--radius-sm);
}

#articleContent blockquote {
  background: var(--surface);
  border-left: 3px solid var(--accent);
}

.pagination li a,
.pagination li.active a {
  color: var(--fg);
}

.page-number,
.next,
.prev {
  background: var(--surface-warm) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-pill) !important;
  color: var(--muted) !important;
}

.pagination .active {
  background: transparent;
}

.pagination li.active a {
  background: color-mix(in oklab, var(--accent), var(--bg) 91%) !important;
  color: var(--accent-hover) !important;
}

.progress-bar {
  background: linear-gradient(90deg, var(--accent) 0%, color-mix(in oklab, var(--accent), white 24%) 100%);
}

.is-hidden {
  display: none !important;
}

.empty-state {
  background: var(--surface-warm);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  color: var(--muted);
  line-height: 1.6;
  margin-top: var(--space-6);
  padding: var(--space-6);
}

.empty-state strong {
  color: var(--fg);
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

@media (max-width: 1120px) {
  .container,
  .post-container,
  .content .container {
    width: min(var(--container-max), calc(100% - var(--container-gutter-tablet) * 2));
  }

  .nav-row {
    gap: var(--space-4);
    grid-template-columns: minmax(136px, auto) minmax(0, 1fr) auto;
  }

  .site-nav {
    gap: var(--space-1);
    justify-self: center;
  }

  .site-nav a {
    font-size: 12px;
    padding: 9px 8px;
  }

  .hero,
  .about-hero,
  .section-head,
  .split-panel,
  .contact-grid,
  .card-grid,
  .card-grid.two,
  .metric-strip,
  .profile-layout,
  .path-map {
    grid-template-columns: 1fr;
  }

  .profile-sidebar {
    flex-direction: row;
    align-items: center;
    gap: var(--space-5);
  }

  .profile-avatar {
    width: 120px;
    flex-shrink: 0;
  }

  .about-hero-avatar {
    max-width: 320px;
  }

  .archive-row,
  .archive-row.has-preview,
  .longform-card {
    grid-template-columns: 1fr;
  }

  .archive-row .tag {
    justify-self: start;
  }

  .longform-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .container,
  .post-container,
  .content .container {
    width: min(var(--container-max), calc(100% - var(--container-gutter-phone) * 2));
  }

  .post-cover {
    height: auto !important;
    min-height: 260px;
    padding: 56px 0;
  }

  .bg-cover .post-title {
    font-size: 32px;
    line-height: 1.2;
    overflow-wrap: anywhere;
  }

  .about-hero-avatar {
    max-width: 240px;
  }

  .hero,
  .hero-narrow {
    padding: 56px 0 40px;
  }

  .post-hero {
    padding-top: 48px;
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav-card-next {
    text-align: left;
  }

  .display-title {
    font-size: 38px;
  }

  .page-title {
    font-size: 32px;
  }

  .lead {
    font-size: var(--text-base);
  }

  .filter-bar,
  .footer-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .search-field {
    width: 100%;
  }

  .site-mobile-nav {
    padding: var(--space-5);
  }

  .nav-row {
    grid-template-columns: 1fr auto;
  }

  .site-nav,
  .site-nav.hide-on-med-and-down {
    display: none !important;
  }

  .site-mobile-trigger {
    display: inline-flex;
  }
}

/* Slide deck embeds ({% slides %} tag) */
.slides-embed {
  margin: var(--space-8) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface);
}

.slides-embed-frame {
  aspect-ratio: 16 / 9;
  background: #000;
}

.slides-embed-frame iframe {
  border: 0;
  display: block;
  height: 100%;
  width: 100%;
}

.slides-embed-bar {
  align-items: center;
  border-top: 1px solid var(--border-soft);
  display: flex;
  font-size: 13px;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
}

.slides-embed-title {
  color: var(--fg);
  font-weight: 600;
}

.slides-embed-hint {
  color: var(--muted);
  margin-left: auto;
}

.slides-embed-open {
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
}

.slides-embed-open:hover {
  text-decoration: underline;
}

@media (max-width: 720px) {
  .slides-embed-hint {
    display: none;
  }

  .slides-embed-bar {
    flex-wrap: wrap;
  }
}

/* Dark-theme fix for article tables (matery.css hardcodes light backgrounds) */
:root[data-theme="dark"] table tr:nth-child(2n),
:root[data-theme="dark"] thead {
  background-color: var(--surface);
}

:root[data-theme="dark"] #articleContent table th {
  background-color: var(--surface);
  border-color: var(--border);
}

:root[data-theme="dark"] #articleContent table td {
  border-color: var(--border);
}

/* Respect users who prefer reduced motion: neutralize transitions/animations/smooth scroll */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}