/* Managed by my-article: shared personal-site visual system. */

:root {
  color-scheme: light dark;
  --paper: #f2f0e9;
  --paper-elevated: rgba(255, 255, 255, 0.64);
  --ink: #171914;
  --ink-soft: #555950;
  --line: rgba(23, 25, 20, 0.16);
  --signal: #b8ff3d;
  --signal-ink: #1c2a00;
  --signal-muted: rgba(184, 255, 61, 0.2);
  --shadow: 0 20px 50px rgba(28, 33, 20, 0.08);
  --page: min(1180px, calc(100vw - 48px));
  --reading: 760px;
  --radius-lg: 28px;
  --radius-md: 18px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Iowan Old Style", "Baskerville", "Noto Serif SC", "Songti SC",
    "STSong", serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 82% 3%, var(--signal-muted), transparent 25rem),
    linear-gradient(180deg, rgba(255, 255, 255, 0.24), transparent 36rem),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:hover {
  text-decoration-color: var(--signal-ink);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 4px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-180%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--paper) 84%, transparent);
  backdrop-filter: blur(18px);
}

.nav-shell {
  width: var(--page);
  min-height: 80px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--signal);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: -0.04em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  background: var(--signal);
  color: var(--signal-ink);
}

main {
  overflow: clip;
}

.hero,
.page-hero,
.section,
.site-footer {
  width: var(--page);
  margin-inline: auto;
}

.hero {
  min-height: min(790px, calc(100svh - 80px));
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.55fr);
  align-items: center;
  gap: clamp(44px, 8vw, 110px);
  padding-block: clamp(72px, 10vw, 140px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 720;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 2px;
  background: var(--signal);
  content: "";
}

.hero h1,
.page-hero h1 {
  max-width: 900px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(48px, 7.4vw, 102px);
  font-weight: 560;
  letter-spacing: -0.055em;
  line-height: 0.99;
}

.hero h1 em {
  position: relative;
  z-index: 0;
  font-style: normal;
  white-space: nowrap;
}

.hero h1 em::after {
  position: absolute;
  z-index: -1;
  right: -0.04em;
  bottom: 0.07em;
  left: -0.04em;
  height: 0.2em;
  background: var(--signal);
  content: "";
  transform: rotate(-1deg);
}

.hero-lede,
.page-lede {
  max-width: 720px;
  margin: 32px 0 0;
  color: var(--ink-soft);
  font-size: clamp(18px, 2.1vw, 24px);
  line-height: 1.58;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 18px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 730;
  text-decoration: none;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease;
}

.button:hover {
  box-shadow: 0 8px 0 var(--ink);
  transform: translateY(-3px);
}

.button-primary {
  background: var(--ink);
  color: var(--paper);
}

.button-signal {
  border-color: var(--signal-ink);
  background: var(--signal);
  color: var(--signal-ink);
}

.machine-passport {
  position: relative;
  padding: 24px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--paper-elevated) 86%, transparent);
  box-shadow: var(--shadow);
  transform: rotate(1.5deg);
}

.machine-passport::before {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 6px var(--signal-muted);
  content: "";
}

.passport-label {
  margin: 0 0 28px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.passport-name {
  margin: 0;
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 560;
  letter-spacing: -0.04em;
}

.passport-table {
  width: 100%;
  margin-top: 22px;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12px;
}

.passport-table th,
.passport-table td {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.passport-table th {
  width: 36%;
  color: var(--ink-soft);
  font-weight: 500;
}

.passport-table td {
  font-weight: 680;
}

.section {
  padding-block: clamp(76px, 10vw, 132px);
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(280px, 0.35fr);
  gap: 40px;
  align-items: end;
  margin-bottom: clamp(42px, 7vw, 76px);
}

.section-heading h2 {
  max-width: 760px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(38px, 5.2vw, 70px);
  font-weight: 540;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.section-heading p {
  margin: 0;
  color: var(--ink-soft);
}

.focus-grid,
.project-grid,
.article-grid,
.principle-grid,
.endpoint-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.focus-item {
  min-height: 250px;
  padding: 28px 0 0;
  border-top: 4px solid var(--ink);
}

.focus-index {
  display: inline-flex;
  margin-bottom: 38px;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 12px;
}

.focus-item h3,
.project-card h3,
.article-card h3,
.principle-card h3,
.endpoint-card h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 29px;
  font-weight: 580;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.focus-item p,
.project-card p,
.article-card p,
.principle-card p,
.endpoint-card p {
  margin: 18px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.project-card,
.article-card,
.principle-card,
.endpoint-card {
  position: relative;
  min-height: 340px;
  padding: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper-elevated);
}

.project-card::after,
.endpoint-card::after {
  position: absolute;
  right: -35px;
  bottom: -35px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: var(--signal);
  content: "";
  opacity: 0.55;
}

.case-study-intro {
  max-width: 900px;
  margin: -20px 0 52px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.case-study-intro p {
  margin: 0;
  padding: 24px;
  border-top: 3px solid var(--ink);
  color: var(--ink-soft);
}

.case-study-intro strong {
  color: var(--ink);
}

.diagram-panel {
  margin: 24px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper-elevated);
  box-shadow: var(--shadow);
}

.diagram-panel figcaption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}

.diagram-panel figcaption span {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 720;
  letter-spacing: 0.1em;
}

.diagram-panel figcaption strong {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 580;
}

.diagram-panel iframe {
  width: 100%;
  height: 520px;
  display: block;
  border: 0;
  background: var(--paper);
}

.card-eyebrow {
  margin: 0 0 42px;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 720;
  letter-spacing: 0.1em;
}

.card-link {
  position: absolute;
  z-index: 2;
  right: 28px;
  bottom: 26px;
  left: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  font-weight: 720;
  text-decoration: none;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 64px;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 650;
}

.article-card {
  min-height: 390px;
  display: flex;
  flex-direction: column;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 48px;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
}

.article-card h3 {
  font-size: 31px;
}

.article-card > p {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 5;
}

.article-card .card-link {
  margin-top: auto;
}

.statement-band {
  width: 100%;
  padding: clamp(80px, 12vw, 150px) 24px;
  background: var(--ink);
  color: var(--paper);
}

.statement-inner {
  width: var(--page);
  margin: 0 auto;
}

.statement-band blockquote {
  max-width: 1000px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(46px, 7.5vw, 102px);
  font-weight: 520;
  letter-spacing: -0.055em;
  line-height: 1;
}

.statement-band mark {
  background: var(--signal);
  color: var(--signal-ink);
}

.statement-band p {
  max-width: 620px;
  margin: 40px 0 0 auto;
  color: color-mix(in srgb, var(--paper) 70%, transparent);
}

.page-hero {
  padding-block: clamp(80px, 11vw, 150px);
}

.page-hero h1 {
  max-width: 980px;
  font-size: clamp(50px, 7vw, 94px);
}

.reading-column {
  max-width: var(--reading);
}

.reading-column h2 {
  margin: 2.4em 0 0.7em;
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 50px);
  font-weight: 560;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.reading-column p,
.reading-column li {
  color: var(--ink-soft);
  font-size: 19px;
}

.reading-column strong {
  color: var(--ink);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 13px;
}

.data-table th,
.data-table td {
  padding: 15px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  color: var(--ink-soft);
  font-weight: 540;
}

.endpoint-card {
  min-height: 280px;
}

.endpoint-path {
  display: inline-flex;
  margin: 0 0 32px;
  padding: 7px 10px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--signal);
  font-family: var(--mono);
  font-size: 12px;
}

.site-footer {
  padding-block: 48px;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: end;
}

.footer-title {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 560;
  letter-spacing: -0.035em;
}

.footer-note,
.footer-meta {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.footer-legal {
  display: block;
  width: fit-content;
  margin-top: 8px;
  margin-left: auto;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
}

.footer-links a {
  font-size: 13px;
}

@media (max-width: 900px) {
  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .machine-passport {
    max-width: 520px;
    transform: none;
  }

  .section-heading {
    grid-template-columns: 1fr;
  }

  .focus-grid,
  .project-grid,
  .article-grid,
  .principle-grid,
  .endpoint-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  :root {
    --page: min(100% - 28px, 1180px);
  }

  body {
    font-size: 16px;
  }

  .nav-shell {
    min-height: auto;
    align-items: flex-start;
    padding-block: 14px;
  }

  .brand span:last-child {
    display: none;
  }

  .nav-links {
    max-width: calc(100vw - 78px);
    justify-content: flex-end;
    gap: 2px;
  }

  .nav-links a {
    min-height: 36px;
    padding: 5px 8px;
    font-size: 12px;
  }

  .hero {
    padding-block: 68px 90px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: clamp(43px, 13vw, 68px);
  }

  .hero-lede,
  .page-lede {
    font-size: 18px;
  }

  .focus-grid,
  .project-grid,
  .article-grid,
  .principle-grid,
  .endpoint-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding-block: 76px;
  }

  .section-heading h2 {
    font-size: 42px;
  }

  .case-study-intro {
    grid-template-columns: 1fr;
  }

  .diagram-panel figcaption {
    align-items: flex-start;
    flex-direction: column;
  }

  .diagram-panel iframe {
    height: 390px;
  }

  .statement-band blockquote {
    font-size: 48px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .footer-legal {
    margin-left: 0;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161813;
    --paper-elevated: rgba(33, 37, 29, 0.84);
    --ink: #f3f1e8;
    --ink-soft: #afb4a8;
    --line: rgba(243, 241, 232, 0.16);
    --signal: #b8ff3d;
    --signal-ink: #182300;
    --signal-muted: rgba(184, 255, 61, 0.12);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.24);
  }

  .button-primary {
    background: var(--ink);
    color: var(--paper);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .hero-actions,
  .footer-links {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .hero,
  .section,
  .page-hero {
    width: 100%;
    padding-block: 28px;
  }
}