/* Design tokens. Components use only these variables. Light is the base; dark applies when the
   system prefers it (unless the visitor chose light) or when the visitor chose dark. */

:root {
  color-scheme: light;

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-base: 14px;
  --fs-md: 15px;
  --fs-prose: 16px;
  --fs-title: 20px;
  --fs-hero: clamp(28px, 3.6vw, 40px);
  --lh-tight: 1.2;
  --lh-base: 1.5;
  --lh-prose: 1.7;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 56px;

  --radius-card: 12px;
  --radius-menu: 10px;
  --radius-control: 8px;
  --radius-sm: 6px;
  --radius-pill: 999px;

  --nav-width: 232px;
  --nav-rail: 60px;
  --topbar-height: 52px;
  --tabbar-height: 58px;
  --content-max: 1040px;
  --prose-max: 680px;
  --toc-width: 220px;
  --control-height: 32px;
  --control-height-sm: 28px;

  --z-sticky: 10;
  --z-nav: 20;
  --z-progress: 30;
  --z-float: 50;
  --z-tooltip: 400;

  --dur-fast: 120ms;
  --dur-base: 180ms;
  --ease: cubic-bezier(0.2, 0, 0, 1);

  /* Surfaces: navigation, canvas, content (three tonal levels), plus floating elements. */
  --surface-nav: #f1f2f6;
  --surface-canvas: #f8f8fb;
  --surface-card: #ffffff;
  --surface-sunken: #f3f4f8;
  --surface-hover: #ecedf3;
  --surface-active: #e3e5ee;
  --surface-float: #ffffff;
  --surface-backdrop: rgba(15, 17, 30, 0.32);
  --surface-inverse: #171a26;

  --border-hairline: #e2e4ec;
  --border-strong: #cbcfdc;

  --text-primary: #12141c;
  --text-secondary: #4a4f60;
  --text-tertiary: #5e6375;
  --text-inverse: #f2f3f8;

  --accent: #4f46e5;
  --accent-fill: #4f46e5;
  --accent-fill-hover: #4338ca;
  --accent-on: #ffffff;
  --accent-soft: #eceafe;
  --focus-ring: #4f46e5;

  --shadow-float: 0 10px 30px rgba(18, 20, 40, 0.12), 0 2px 6px rgba(18, 20, 40, 0.08);
  --shadow-hover: 0 4px 14px rgba(18, 20, 40, 0.08);

  /* Entity colours: each section keeps its colour wherever it appears. */
  --entity-home: #4f46e5;
  --entity-about: #5b5bd6;
  --entity-projects: #c2610f;
  --entity-writing: #0b8a63;
  --entity-tools: #b23e78;
  --entity-contact: #0e7fae;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --surface-nav: #0c0d12;
    --surface-canvas: #111319;
    --surface-card: #171a21;
    --surface-sunken: #13151b;
    --surface-hover: #1e2129;
    --surface-active: #272a34;
    --surface-float: #1c1f27;
    --surface-backdrop: rgba(0, 0, 0, 0.55);
    --surface-inverse: #e8eaf2;
    --border-hairline: #252833;
    --border-strong: #343846;
    --text-primary: #e8eaf2;
    --text-secondary: #a7acbd;
    --text-tertiary: #8f95a8;
    --text-inverse: #111319;
    --accent: #8b93ff;
    --accent-fill: #8b93ff;
    --accent-fill-hover: #a5abff;
    --accent-on: #0b0c1f;
    --accent-soft: #23264a;
    --focus-ring: #8b93ff;
    --shadow-float: 0 12px 36px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.35);
    --entity-home: #8b93ff;
    --entity-about: #929eff;
    --entity-projects: #f5a35c;
    --entity-writing: #44e2b0;
    --entity-tools: #f08cbf;
    --entity-contact: #5cc8f0;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-nav: #0c0d12;
  --surface-canvas: #111319;
  --surface-card: #171a21;
  --surface-sunken: #13151b;
  --surface-hover: #1e2129;
  --surface-active: #272a34;
  --surface-float: #1c1f27;
  --surface-backdrop: rgba(0, 0, 0, 0.55);
  --surface-inverse: #e8eaf2;
  --border-hairline: #252833;
  --border-strong: #343846;
  --text-primary: #e8eaf2;
  --text-secondary: #a7acbd;
  --text-tertiary: #8f95a8;
  --text-inverse: #111319;
  --accent: #8b93ff;
  --accent-fill: #8b93ff;
  --accent-fill-hover: #a5abff;
  --accent-on: #0b0c1f;
  --accent-soft: #23264a;
  --focus-ring: #8b93ff;
  --shadow-float: 0 12px 36px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.35);
  --entity-home: #8b93ff;
  --entity-about: #929eff;
  --entity-projects: #f5a35c;
  --entity-writing: #44e2b0;
  --entity-tools: #f08cbf;
  --entity-contact: #5cc8f0;
}

/* Base --------------------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: var(--space-6);
}
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}
body {
  margin: 0;
  background: var(--surface-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-base);
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
button,
input {
  font: inherit;
  color: inherit;
}
button {
  cursor: pointer;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
}
h1,
h2,
h3,
h4 {
  margin: 0;
}
:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}
::selection {
  background: var(--accent-soft);
}
.icon {
  flex: none;
}
html:not(.js) .js-only {
  display: none !important;
}
.muted {
  color: var(--text-secondary);
}
.skip {
  position: fixed;
  left: var(--space-4);
  top: -60px;
  z-index: var(--z-tooltip);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-control);
  background: var(--surface-inverse);
  color: var(--text-inverse);
  font-weight: var(--fw-medium);
}
.skip:focus {
  top: var(--space-4);
}

/* Shell -------------------------------------------------------------------------------------- */
.shell {
  display: grid;
  grid-template-columns: var(--nav-width) minmax(0, 1fr);
  min-height: 100dvh;
}
.sidebar-col {
  background: var(--surface-nav);
  border-right: 1px solid var(--border-hairline);
}
.sidebar {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  height: 100dvh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-3) var(--space-4);
  scrollbar-width: none;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: 40px;
  padding: 0 var(--space-2);
  margin-bottom: var(--space-2);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  white-space: nowrap;
}
.brand-mark {
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 6px;
}
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-heading {
  margin: var(--space-4) 0 var(--space-1);
  padding: 0 var(--space-2);
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
}
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  height: 32px;
  padding: 0 var(--space-2);
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--text-secondary);
  font-weight: var(--fw-medium);
  text-align: left;
  white-space: nowrap;
}
.nav-item:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}
.nav-item[aria-current] {
  background: var(--surface-active);
  color: var(--text-primary);
}
.nav-item[aria-current] .icon {
  color: var(--accent);
}
.nav-label {
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-meta {
  display: inline-flex;
  gap: 3px;
  margin-left: auto;
  color: var(--text-tertiary);
}
.sidebar-foot {
  margin-top: auto;
  padding-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.theme-seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin: var(--space-1) 0;
  padding: 2px;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-control);
  background: var(--surface-sunken);
}
.theme-seg button {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-tertiary);
}
.theme-seg button:hover {
  color: var(--text-primary);
}
:root:not([data-theme]) .theme-seg [data-theme-choice="system"],
:root[data-theme="light"] .theme-seg [data-theme-choice="light"],
:root[data-theme="dark"] .theme-seg [data-theme-choice="dark"] {
  background: var(--surface-card);
  border-color: var(--border-hairline);
  color: var(--text-primary);
}
.theme-cycle {
  display: none;
}
.theme-icon,
.collapse-icon {
  display: inline-flex;
}
.theme-icon .icon,
.collapse-icon .icon:last-child {
  display: none;
}
:root:not([data-theme]) .theme-icon .icon:nth-child(3),
:root[data-theme="light"] .theme-icon .icon:nth-child(1),
:root[data-theme="dark"] .theme-icon .icon:nth-child(2) {
  display: block;
}

/* Collapsed sidebar: an icon rail with tooltips. */
@media (min-width: 761px) {
  :root[data-nav="collapsed"] .shell {
    grid-template-columns: var(--nav-rail) minmax(0, 1fr);
  }
  :root[data-nav="collapsed"] .sidebar {
    padding-inline: var(--space-2);
    align-items: center;
  }
  :root[data-nav="collapsed"] .brand {
    padding: 0;
    justify-content: center;
    width: 36px;
  }
  :root[data-nav="collapsed"] .sidebar .nav-label,
  :root[data-nav="collapsed"] .sidebar .nav-meta,
  :root[data-nav="collapsed"] .nav-heading,
  :root[data-nav="collapsed"] .theme-seg {
    display: none;
  }
  :root[data-nav="collapsed"] .nav-list {
    align-items: center;
  }
  :root[data-nav="collapsed"] .nav-heading + .nav-list {
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-hairline);
  }
  :root[data-nav="collapsed"] .sidebar .nav-item {
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
  }
  :root[data-nav="collapsed"] .theme-cycle {
    display: flex;
  }
  :root[data-nav="collapsed"] .collapse-icon .icon:first-child {
    display: none;
  }
  :root[data-nav="collapsed"] .collapse-icon .icon:last-child {
    display: block;
  }
}

.main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.topbar,
.tabbar {
  display: none;
}
.page {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
}
#content {
  flex: 1;
  padding-bottom: var(--space-10);
}
#content:focus {
  outline: none;
}

/* Building blocks ---------------------------------------------------------------------------- */
.card {
  background: var(--surface-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-card);
  min-width: 0;
}
.card-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--border-hairline);
}
.card-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
}
.card-body {
  padding: var(--space-4);
}
.list-card {
  overflow: hidden;
}
.entity {
  display: inline-flex;
}
.entity[data-entity="home"] { color: var(--entity-home); }
.entity[data-entity="about"] { color: var(--entity-about); }
.entity[data-entity="projects"] { color: var(--entity-projects); }
.entity[data-entity="writing"] { color: var(--entity-writing); }
.entity[data-entity="tools"] { color: var(--entity-tools); }
.entity[data-entity="contact"] { color: var(--entity-contact); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: var(--control-height);
  padding: 0 var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-control);
  background: var(--surface-card);
  color: var(--text-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  white-space: nowrap;
}
.btn:hover {
  background: var(--surface-hover);
}
.btn .icon {
  color: var(--text-secondary);
}
.btn-primary {
  border-color: var(--accent-fill);
  background: var(--accent-fill);
  color: var(--accent-on);
}
.btn-primary .icon {
  color: inherit;
}
.btn-primary:hover {
  border-color: var(--accent-fill-hover);
  background: var(--accent-fill-hover);
}
.btn-sm {
  height: var(--control-height-sm);
  padding: 0 10px;
  font-size: var(--fs-sm);
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--control-height);
  height: var(--control-height);
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--text-secondary);
}
.icon-btn:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}
.icon-btn-bordered {
  border: 1px solid var(--border-strong);
  background: var(--surface-card);
}
.kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  background: var(--surface-sunken);
  color: var(--text-tertiary);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: var(--fw-medium);
  line-height: 1;
}

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}
.chip {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 10px;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-pill);
  background: var(--surface-sunken);
  color: var(--text-secondary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
}
.chip:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.chip[aria-pressed="true"] {
  border-color: var(--surface-inverse);
  background: var(--surface-inverse);
  color: var(--text-inverse);
}

.row-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.row-list > li + li {
  border-top: 1px solid var(--border-hairline);
}
.row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 52px;
  padding: var(--space-3) var(--space-4);
}
a.row:hover {
  background: var(--surface-hover);
}
.row-icon {
  display: inline-flex;
  color: var(--text-secondary);
}
.row-main {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.row-title {
  color: var(--text-primary);
  font-weight: var(--fw-medium);
}
.row-sub {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}
.row-end {
  display: inline-flex;
  color: var(--text-tertiary);
}
.empty {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-card);
  color: var(--text-secondary);
}
.empty[hidden],
[hidden] {
  display: none !important;
}

/* Home --------------------------------------------------------------------------------------- */
.hero {
  padding: var(--space-12) 0 var(--space-6);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 var(--space-3);
  color: var(--text-tertiary);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
}
.hero-title {
  font-size: var(--fs-hero);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
  line-height: var(--lh-tight);
}
.typed-wrap {
  display: inline-block;
  color: var(--accent);
}
.caret {
  display: inline-block;
  width: 2px;
  height: 0.85em;
  margin-left: 2px;
  background: currentColor;
  vertical-align: -0.08em;
  animation: blink 1s step-end infinite;
}
@keyframes blink {
  50% {
    opacity: 0;
  }
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.section {
  padding-top: var(--space-10);
}
.section-head {
  margin-bottom: var(--space-4);
}
.section-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-title);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.01em;
  line-height: var(--lh-tight);
}
.lede {
  max-width: 62ch;
  margin: var(--space-1) 0 0;
  color: var(--text-secondary);
}
.group-label {
  margin: var(--space-4) 0 0;
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
}
.card-body > .group-label:first-child {
  margin-top: 0;
}

.about-grid {
  display: grid;
  gap: var(--space-4);
  align-items: start;
}
.bio p {
  margin: 0;
  font-size: var(--fs-md);
  line-height: 1.65;
}
.bio p + p {
  margin-top: var(--space-3);
}
#skills .lede {
  margin: 0 0 var(--space-1);
}

.feature-list {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.feature {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-4);
}
.kicker {
  margin: 0 0 var(--space-1);
  color: var(--entity-projects);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
}
.title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-1) var(--space-3);
}
.title-row h3 {
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
}
.feature .title-row h3 {
  font-size: 17px;
}
.date {
  color: var(--text-tertiary);
  font-size: var(--fs-sm);
  font-variant-numeric: tabular-nums;
}
.feature-copy .muted,
.project-row .muted {
  margin: var(--space-2) 0 0;
  max-width: 62ch;
}
.live-link {
  margin-top: var(--space-4);
}
.project-row {
  padding: var(--space-4);
  scroll-margin-top: var(--space-6);
}
.highlights {
  margin: var(--space-2) 0 0;
  padding-left: 1.1rem;
  color: var(--text-secondary);
}
.highlights li + li {
  margin-top: 2px;
}
.highlights a,
.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, currentColor 35%, transparent);
  text-underline-offset: 0.18em;
}
.highlights a:hover,
.prose a:hover {
  text-decoration-color: currentColor;
}

.browser {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 10;
  min-height: 200px;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-menu);
  background: var(--surface-sunken);
}
.browser-bar {
  display: flex;
  align-items: center;
  gap: 5px;
  height: 32px;
  padding: 0 var(--space-3);
  border-bottom: 1px solid var(--border-hairline);
  background: var(--surface-nav);
}
.browser-bar span {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--border-strong);
}
.browser-bar p {
  margin: 0 0 0 var(--space-2);
  overflow: hidden;
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.preview-load,
.browser iframe {
  flex: 1;
  width: 100%;
  min-height: 0;
  border: 0;
}
.preview-load {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  background: transparent;
  color: var(--text-primary);
}
.preview-load .icon {
  margin-bottom: var(--space-1);
  color: var(--text-tertiary);
}
.preview-load span {
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
}
.preview-load:hover {
  background: var(--surface-hover);
}
.preview-load.is-loading {
  opacity: 0.7;
}
.preview-close {
  position: absolute;
  top: 4px;
  right: var(--space-2);
}

.post-row .row-sub {
  display: -webkit-box;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px var(--space-3);
  margin: var(--space-1) 0 0;
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
  font-variant-numeric: tabular-nums;
}
.post-meta > * {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}
.tool {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: 100%;
  padding: var(--space-3);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.tool:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-hover);
}
.tool img {
  flex: none;
  width: 36px;
  height: 36px;
  object-fit: contain;
}
.tool-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.site-footer {
  padding: var(--space-6) 0 var(--space-8);
  scroll-margin-top: var(--space-6);
}
.fineprint {
  margin: var(--space-4) 0 0;
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
}
.missing {
  padding: var(--space-12) 0;
}
.missing .lede {
  margin-top: var(--space-2);
}
.standalone .brand {
  display: inline-flex;
  margin: 0 0 var(--space-8) calc(-1 * var(--space-2));
}

/* Post --------------------------------------------------------------------------------------- */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-progress);
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}
.post-layout {
  max-width: var(--prose-max);
  margin: 0 auto;
  padding-top: var(--space-8);
}
.post {
  position: relative;
}
.crumbs a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: calc(-1 * var(--space-2));
  padding: 4px var(--space-2);
  border-radius: var(--radius-control);
  color: var(--text-secondary);
  font-weight: var(--fw-medium);
}
.crumbs a:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}
.post-title {
  margin: var(--space-4) 0 var(--space-2);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
  line-height: var(--lh-tight);
}
.post .post-meta {
  font-size: var(--fs-sm);
}
.post .post-meta a:hover {
  color: var(--text-primary);
}
.audio {
  margin-top: var(--space-5);
  padding: var(--space-3) var(--space-4) var(--space-4);
  scroll-margin-top: var(--space-6);
}
.audio audio {
  display: block;
  width: 100%;
  margin-top: var(--space-3);
}
.toc {
  margin-top: var(--space-5);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-card);
  background: var(--surface-card);
}
.toc summary {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  min-height: 40px;
  color: var(--text-secondary);
  font-weight: var(--fw-medium);
  cursor: pointer;
  list-style: none;
}
.toc summary::-webkit-details-marker {
  display: none;
}
.toc ol {
  margin: 0;
  padding: 0 var(--space-2) var(--space-3);
  list-style: none;
}
.toc a {
  display: block;
  padding: 5px var(--space-2) 5px var(--space-3);
  border-left: 2px solid var(--border-hairline);
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.35;
}
.toc a:hover {
  color: var(--text-primary);
}
.toc .toc-sub a {
  padding-left: var(--space-6);
}
.toc a[aria-current] {
  border-left-color: var(--accent);
  color: var(--text-primary);
}
@media (min-width: 1200px) {
  .post-layout.has-toc {
    max-width: calc(var(--prose-max) + var(--toc-width) + var(--space-10));
    padding-right: calc(var(--toc-width) + var(--space-10));
  }
  /* The contents float into the right margin and stick while the post scrolls. */
  .has-toc .toc {
    position: sticky;
    top: var(--space-6);
    float: right;
    width: var(--toc-width);
    max-height: calc(100dvh - var(--space-12));
    overflow-y: auto;
    margin: 0 calc(-1 * (var(--toc-width) + var(--space-10))) 0 0;
    border: 0;
    background: transparent;
  }
  .js .has-toc .toc summary {
    display: none;
  }
  .has-toc .toc ol {
    padding: 0;
  }
  .has-toc .toc ol::before {
    content: "On this page";
    display: block;
    margin-bottom: var(--space-2);
    color: var(--text-tertiary);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
  }
}

.prose {
  margin-top: var(--space-6);
  font-size: var(--fs-prose);
  line-height: var(--lh-prose);
  overflow-wrap: break-word;
}
.prose > * {
  margin: 0;
}
.prose > * + * {
  margin-top: var(--space-4);
}
.prose h2,
.prose h3 {
  scroll-margin-top: var(--space-6);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.prose h2 {
  margin-top: var(--space-10);
  font-size: 21px;
}
.prose h3 {
  margin-top: var(--space-8);
  font-size: 17px;
}
.prose ul,
.prose ol {
  padding-left: 1.3rem;
}
.prose li + li {
  margin-top: var(--space-1);
}
.prose blockquote {
  margin-left: 0;
  margin-right: 0;
  padding: var(--space-1) var(--space-4);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-control);
  background: var(--surface-sunken);
  color: var(--text-secondary);
}
.prose code {
  padding: 0.12em 0.35em;
  border-radius: var(--radius-sm);
  background: var(--surface-sunken);
  font-family: var(--font-mono);
  font-size: 0.86em;
}
.prose pre {
  position: relative;
  overflow-x: auto;
  padding: var(--space-4);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-menu);
  background: var(--surface-sunken);
}
.prose pre code {
  padding: 0;
  background: none;
  font-size: 13px;
  line-height: 1.6;
}
.copy-code {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  opacity: 0;
  border: 1px solid var(--border-hairline);
  background: var(--surface-card);
}
.prose pre:hover .copy-code,
.copy-code:focus-visible {
  opacity: 1;
}
@media (hover: none) {
  .copy-code {
    opacity: 1;
  }
}
.prose img {
  display: block;
  width: 100%;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-menu);
}
.prose figure {
  margin-inline: 0;
}
.prose figcaption {
  margin-top: var(--space-2);
  color: var(--text-tertiary);
  font-size: var(--fs-sm);
  text-align: center;
}
.prose table {
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: var(--fs-base);
}
.prose th,
.prose td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--border-hairline);
  text-align: left;
}
.prose hr {
  border: 0;
  border-top: 1px solid var(--border-hairline);
}
.related {
  margin-top: var(--space-10);
}
.related .group-label {
  margin-bottom: var(--space-2);
}
.post-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.post-nav a {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-3) var(--space-4);
}
.post-nav a:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-hover);
}
.post-nav .older {
  text-align: right;
}

/* Floating: dialogs, palette, tooltip, filter -------------------------------------------------- */
dialog.dialog {
  width: min(480px, calc(100vw - 32px));
  max-height: 72dvh;
  padding: 0;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-card);
  background: var(--surface-float);
  color: var(--text-primary);
  box-shadow: var(--shadow-float);
}
dialog.dialog::backdrop {
  background: var(--surface-backdrop);
}
.dialog-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-3) 0 var(--space-4);
}
.dialog-title {
  flex: 1;
  outline: none;
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
}
.shortcut-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-2) var(--space-6);
  margin: 0;
  padding: var(--space-3) var(--space-4) var(--space-4);
}
.shortcut-grid dt {
  color: var(--text-primary);
}
.shortcut-grid dd {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  margin: 0;
}
.shortcut-grid .or {
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
}

dialog.palette {
  width: min(580px, calc(100vw - 24px));
  margin-top: 14vh;
  overflow: hidden;
}
dialog.palette[open] {
  display: flex;
  flex-direction: column;
}
.palette-input {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--border-hairline);
  color: var(--text-tertiary);
}
.palette-input input {
  flex: 1;
  min-width: 0;
  height: 48px;
  border: 0;
  background: transparent;
  color: var(--text-primary);
  font-size: var(--fs-md);
  outline: none;
}
.palette-list {
  flex: 1;
  max-height: 380px;
  overflow-y: auto;
  padding: var(--space-1);
  overscroll-behavior: contain;
}
.menu-label {
  padding: 8px var(--space-2) 2px;
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
}
.menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 36px;
  padding: 6px var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
}
.menu-item[aria-selected="true"] {
  background: var(--surface-hover);
}
.menu-item .glyph {
  display: inline-flex;
  color: var(--text-secondary);
}
.menu-item .glyph img {
  width: 16px;
  height: 16px;
  object-fit: contain;
}
.menu-item .glyph[data-entity="home"] { color: var(--entity-home); }
.menu-item .glyph[data-entity="about"] { color: var(--entity-about); }
.menu-item .glyph[data-entity="projects"] { color: var(--entity-projects); }
.menu-item .glyph[data-entity="writing"] { color: var(--entity-writing); }
.menu-item .glyph[data-entity="tools"] { color: var(--entity-tools); }
.menu-item .glyph[data-entity="contact"] { color: var(--entity-contact); }
.menu-item .label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.menu-item .meta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
  white-space: nowrap;
}
.palette-empty {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-3);
  color: var(--text-secondary);
}
.palette-foot {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-4);
  border-top: 1px solid var(--border-hairline);
  color: var(--text-tertiary);
  font-size: var(--fs-xs);
}
.palette-foot span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tooltip {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-tooltip);
  max-width: 260px;
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  background: var(--surface-inverse);
  color: var(--text-inverse);
  box-shadow: var(--shadow-float);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  line-height: 1.35;
  pointer-events: none;
}
.tooltip .kbd {
  margin-left: 6px;
  min-width: 16px;
  height: 16px;
  border-color: transparent;
  background: color-mix(in srgb, var(--text-inverse) 16%, transparent);
  color: inherit;
}

.filter-clear {
  position: fixed;
  left: 50%;
  bottom: var(--space-4);
  z-index: var(--z-float);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  max-width: calc(100% - 32px);
  height: 36px;
  padding: 0 var(--space-3) 0 var(--space-4);
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--surface-inverse);
  color: var(--text-inverse);
  box-shadow: var(--shadow-float);
  font-weight: var(--fw-medium);
  transform: translateX(-50%);
}

/* Wider screens ------------------------------------------------------------------------------ */
@media (min-width: 1100px) {
  .about-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  }
  .feature {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: center;
    padding: var(--space-5);
  }
}

/* Phones: compact top bar, bottom tab bar ---------------------------------------------------- */
@media (max-width: 760px) {
  html {
    scroll-padding-top: calc(var(--topbar-height) + env(safe-area-inset-top) + var(--space-3));
  }
  body {
    padding-bottom: calc(var(--tabbar-height) + env(safe-area-inset-bottom));
  }
  .shell {
    grid-template-columns: minmax(0, 1fr);
  }
  .sidebar-col {
    display: none;
  }
  .page {
    padding-left: max(var(--space-4), env(safe-area-inset-left));
    padding-right: max(var(--space-4), env(safe-area-inset-right));
  }
  .topbar {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    height: calc(var(--topbar-height) + env(safe-area-inset-top));
    padding: env(safe-area-inset-top) max(var(--space-3), env(safe-area-inset-right)) 0 max(var(--space-3), env(safe-area-inset-left));
    border-bottom: 1px solid var(--border-hairline);
    background: var(--surface-nav);
  }
  .topbar .brand {
    margin: 0;
  }
  .topbar-actions {
    display: flex;
    gap: 2px;
  }
  .topbar .icon-btn {
    width: 40px;
    height: 40px;
  }
  .tabbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-nav);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    height: calc(var(--tabbar-height) + env(safe-area-inset-bottom));
    padding: 0 env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
    border-top: 1px solid var(--border-hairline);
    background: var(--surface-nav);
  }
  .tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: var(--fw-medium);
    -webkit-tap-highlight-color: transparent;
  }
  .tab[aria-current] {
    color: var(--text-primary);
  }
  .tab[aria-current] .icon {
    color: var(--accent);
  }
  .hero {
    padding-top: var(--space-8);
  }
  .section {
    padding-top: var(--space-8);
  }
  .feature {
    padding: var(--space-3);
  }
  .browser {
    display: none;
  }
  .tools {
    grid-template-columns: minmax(0, 1fr);
  }
  .post-layout {
    padding-top: var(--space-5);
  }
  .site-footer,
  .project-row,
  .audio,
  .prose h2,
  .prose h3 {
    scroll-margin-top: calc(var(--topbar-height) + env(safe-area-inset-top) + var(--space-3));
  }
  .read-progress {
    top: calc(var(--topbar-height) + env(safe-area-inset-top) - 2px);
  }
  .filter-clear {
    bottom: calc(var(--tabbar-height) + env(safe-area-inset-bottom) + var(--space-3));
  }
  dialog.dialog {
    margin-bottom: calc(var(--space-4) + env(safe-area-inset-bottom));
    margin-top: auto;
  }
  dialog.palette {
    margin-top: calc(var(--space-3) + env(safe-area-inset-top));
    margin-bottom: auto;
    max-height: calc(100dvh - var(--space-8) - env(safe-area-inset-top));
  }
  .palette-foot {
    display: none;
  }
  .post-nav .older {
    text-align: left;
  }
}

/* Motion ------------------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .caret {
    display: none;
  }
}