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

:root { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  color: var(--color-text-primary);
  background: var(--color-surface);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-synthesis: none;
  line-height: 1.75;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }
p { text-wrap: pretty; }
h1, h2, h3 {
  margin-block: 0;
  line-break: strict;
  overflow-wrap: anywhere;
  text-wrap: balance;
}
h3 { font-weight: 600; }

:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 4px;
}

::selection {
  color: var(--color-white);
  background: var(--color-logo-blue);
}

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

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
  padding: .75rem 1rem;
  color: var(--color-white);
  background: var(--color-blue-900);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
  transition: transform var(--motion-fast);
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border-subtle);
  background: color-mix(in srgb, var(--color-surface) 94%, transparent);
  backdrop-filter: blur(16px);
}

.header-inner {
  width: min(calc(100% - 2rem), var(--layout-content));
  min-height: 5rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand-link { flex: 0 0 auto; }
.brand-link img { width: 10rem; height: auto; }

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.site-nav a {
  min-height: var(--layout-tap-target);
  padding: 0 .7rem;
  display: inline-flex;
  align-items: center;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover { color: var(--color-text-brand); }
.site-nav a[aria-current="true"] {
  color: var(--color-text-brand);
  background: var(--color-surface-soft);
}

.header-actions { display: flex; align-items: center; gap: .5rem; }
.icon-button,
.menu-button {
  width: var(--layout-tap-target);
  height: var(--layout-tap-target);
  flex: 0 0 var(--layout-tap-target);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
  cursor: pointer;
}

.icon-button {
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
}

.theme-icon { font-size: 1.15rem; line-height: 1; }
.menu-button {
  display: none;
  margin-left: auto;
  border-color: transparent;
  border-radius: var(--radius-sm);
}

.menu-button span[aria-hidden] {
  display: block;
  width: 1.35rem;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
}

/* Controls */
.button {
  min-height: var(--layout-tap-target);
  padding: .68rem 1.15rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--motion-fast), border-color var(--motion-fast), transform var(--motion-fast) var(--motion-ease);
}

.button:hover:not(:disabled) { transform: translateY(-1px); }
.button:active:not(:disabled) { transform: translateY(0); }
.button:disabled {
  color: var(--color-action-disabled-text);
  border-color: var(--color-border-subtle);
  background: var(--color-action-disabled-surface);
  cursor: not-allowed;
}

.button-primary { color: var(--color-action-on-primary); background: var(--color-action-primary); }
.button-primary:hover:not(:disabled) { background: var(--color-action-primary-hover); }
.button-primary:active:not(:disabled) { background: var(--color-action-primary-pressed); }
.button-secondary {
  color: var(--color-text-brand);
  border-color: var(--color-border-strong);
  background: var(--color-surface);
}

.text-link {
  min-height: var(--layout-tap-target);
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--color-text-brand);
  font-weight: 700;
  text-underline-offset: .25em;
}

/* Hero */
.hero {
  min-height: 38rem;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
  isolation: isolate;
}

.hero::before { content: none; }

.hero-watermark {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  user-select: none;
}

.hero-watermark img {
  width: clamp(34rem, 58vw, 62rem);
  max-width: none;
  position: absolute;
  top: 50%;
  right: clamp(-13rem, -8vw, -5rem);
  opacity: .075;
  transform: translateY(-50%);
}

.hero-watermark span {
  position: absolute;
  top: 50%;
  left: clamp(.5rem, 2vw, 2rem);
  color: var(--color-logo-blue);
  font-size: clamp(3.5rem, 7vw, 7rem);
  font-weight: 700;
  line-height: .82;
  letter-spacing: -.055em;
  opacity: .1;
  white-space: nowrap;
  writing-mode: vertical-rl;
  transform: translateY(-50%);
}

:root[data-theme="dark"] .hero-watermark img { opacity: .15; }
:root[data-theme="dark"] .hero-watermark span { color: var(--color-white); opacity: .17; }

.hero-inner {
  width: min(calc(100% - 3rem), var(--layout-content));
  min-height: inherit;
  margin: 0 auto;
  padding: 7rem 0 6rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-index {
  margin: 0 0 1rem;
  color: var(--color-text-brand);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.eyebrow.light { color: rgba(255,255,255,.82); }

.hero h1 {
  max-width: 11.5ch;
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 38rem;
  margin: 1.75rem 0 0;
  color: var(--color-text-secondary);
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.75;
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

/* Shared section rhythm */
.section {
  width: min(calc(100% - 3rem), var(--layout-content));
  margin: 0 auto;
  padding: clamp(5.5rem, 9vw, 7.5rem) 0;
}

.section-heading {
  max-width: 40rem;
  margin-bottom: 3.25rem;
}

.section-heading.compact { max-width: 44rem; }
.section-heading.split {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(18rem, .7fr);
  align-items: end;
  gap: 4rem;
}

.section h2 {
  max-width: 15ch;
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-title);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
}

.section-heading > p:last-child,
.section-heading.split > p {
  max-width: 40rem;
  margin: 1.35rem 0 0;
  color: var(--color-text-secondary);
  font-size: 1.025rem;
  line-height: 1.75;
}

.section-heading.split > p { margin: 0; }

/* Brand principles */
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.principle-card {
  --accent: var(--color-logo-blue);
  min-height: 15rem;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.principle-card::before { content: none; }

.principle-card h3 {
  margin: auto 0 .5rem;
  font-size: 1.35rem;
  line-height: 1.3;
}

.principle-card p { margin: 0; color: var(--color-text-secondary); }
.card-number { color: var(--color-text-muted); font-size: .72rem; font-weight: 700; letter-spacing: .12em; }

.story-panel {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.story-visual {
  min-height: 28rem;
  padding: clamp(2rem, 5vw, 4rem);
  display: grid;
  place-items: center;
  border-right: 1px solid var(--color-border-subtle);
  background: var(--color-canvas);
}

.story-visual img { width: min(100%, 19rem); }
.story-copy { padding: clamp(2rem, 5vw, 4rem); }
.story-copy h3 { max-width: 17ch; font-size: var(--text-heading); line-height: 1.28; }
.story-list { margin: 2rem 0 0; padding: 0; list-style: none; }
.story-list li {
  padding: 1rem 0;
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  border-top: 1px solid var(--color-border-subtle);
}

.story-list strong { color: var(--color-text-brand); }
.story-list span { color: var(--color-text-secondary); }

/* Identity */
.identity-section {
  width: 100%;
  padding-inline: max(1.5rem, calc((100% - var(--layout-content)) / 2));
  border-block: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
}

.logo-showcase {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.logo-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.logo-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 1px solid var(--color-border-subtle);
}

.logo-mode {
  min-width: 0;
  min-height: 13rem;
  margin: 0;
  padding: 3rem 1.25rem 1.75rem;
  display: grid;
  place-items: center;
  position: relative;
}

.logo-mode + .logo-mode { border-left: 1px solid var(--color-border-subtle); }
.logo-mode figcaption {
  position: absolute;
  top: .9rem;
  left: 1rem;
  color: var(--color-gray-600);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.logo-mode-light { background: var(--color-white); }
.logo-mode-dark { background: var(--color-logo-dark-background); }
.logo-mode-dark figcaption { color: var(--color-gray-300); }
.logo-asset { width: auto; max-width: 92%; max-height: 8.5rem; }
.logo-horizontal { width: 92%; }
.logo-integrated { width: 94%; }
.logo-url { width: 90%; }
.logo-symbol { width: 6.5rem; }
.logo-vertical { width: 6.75rem; max-height: 9rem; }
.logo-badge { width: 7.25rem; }

.logo-meta {
  padding: 1.35rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: auto;
}

.logo-meta h3 { margin: .2rem 0; font-size: 1.15rem; }
.logo-meta p { max-width: 34rem; margin: 0; color: var(--color-text-secondary); font-size: .9rem; }
.meta-label,
.resource-type {
  color: var(--color-text-muted);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .13em;
}

.download-link {
  min-width: var(--layout-tap-target);
  min-height: var(--layout-tap-target);
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  color: var(--color-text-brand);
  font-size: .8rem;
  font-weight: 700;
  text-decoration: none;
}

.download-group {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: flex-end;
  gap: .1rem;
}

.construction-panel {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(20rem, .95fr);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.construction-visual {
  min-height: 34rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  display: grid;
  place-items: center;
  border-right: 1px solid var(--color-border-subtle);
  background: var(--color-white);
}

.construction-visual img { width: min(100%, 39rem); height: auto; }
.construction-copy { padding: clamp(2rem, 5vw, 4rem); align-self: center; }
.construction-copy h3 { margin: .4rem 0 1rem; font-size: var(--text-heading); line-height: 1.25; }
.construction-copy > p:not(.meta-label) { margin: 0; color: var(--color-text-secondary); }
.construction-specs { margin: 2rem 0 0; }
.construction-specs div { padding: 1rem 0; display: grid; grid-template-columns: 5.5rem 1fr; gap: 1rem; border-top: 1px solid var(--color-border-subtle); }
.construction-specs dt { color: var(--color-text-brand); font-weight: 700; }
.construction-specs dd { margin: 0; color: var(--color-text-secondary); font-size: .9rem; }
.construction-download { width: fit-content; margin-top: 1rem; }

.usage-rule {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.usage-rule > div { padding: 1.75rem; }
.usage-rule > div + div { border-left: 1px solid var(--color-border-subtle); }
.rule-mark {
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 1rem;
  display: grid;
  place-items: center;
  color: var(--color-text-brand);
  border: 1px solid var(--color-border-subtle);
  border-radius: 50%;
  background: var(--color-surface);
  font-size: 1.1rem;
  font-weight: 700;
}

.usage-rule strong { display: block; font-size: 1.05rem; }
.usage-rule p { margin: .45rem 0 0; color: var(--color-text-secondary); font-size: .9rem; }

/* Color system */
.color-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem;
}

.color-card {
  --swatch: var(--color-logo-blue);
  min-height: 8.5rem;
  padding: 1.25rem;
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  grid-template-rows: auto auto auto;
  column-gap: 1rem;
  align-items: center;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  text-align: left;
  cursor: copy;
}

.color-card::before {
  content: "";
  width: 3.25rem;
  height: 3.25rem;
  grid-row: 1 / 4;
  border: 1px solid color-mix(in srgb, var(--color-border-strong) 70%, transparent);
  border-radius: 50%;
  background: var(--swatch);
}

.color-card:hover { border-color: var(--color-action-primary); }
.color-card strong {
  margin: .1rem 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1rem;
}

.color-card > span:last-child { color: var(--color-text-secondary); font-size: .8rem; }
.color-role { color: var(--color-text-muted); font-size: .65rem; font-weight: 700; letter-spacing: .12em; }
.color-logo { --swatch: var(--color-logo-blue); }
.color-action { --swatch: var(--color-blue-600); }
.color-night { --swatch: var(--color-blue-900); }
.color-mist { --swatch: var(--color-blue-100); }
.color-green { --swatch: var(--color-green-500); }
.color-orange { --swatch: var(--color-orange-500); }
.interaction-note { min-height: 1.5rem; margin: .8rem 0 0; color: var(--color-text-muted); font-size: .82rem; }
.section-deep-link { min-height: var(--layout-tap-target); margin-top: 1.5rem; display: inline-flex; align-items: center; gap: .5rem; color: var(--color-text-brand); font-weight: 600; text-underline-offset: .25em; }

/* Typography specimen */
.type-panel {
  margin-top: 4rem;
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.type-sample {
  min-height: 24rem;
  padding: clamp(2rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--color-text-brand);
  border-right: 1px solid var(--color-border-subtle);
  background: var(--color-canvas);
}

.type-sample p {
  max-width: 7ch;
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0;
}

.type-sample em { color: var(--color-text-brand); font-style: normal; font-weight: 500; }
.type-details { padding: clamp(2rem, 5vw, 4rem); align-self: center; }
.type-details h3 { max-width: 18ch; font-size: var(--text-heading); line-height: 1.3; }
.type-details > p:not(.eyebrow) { max-width: 38rem; color: var(--color-text-secondary); }
.type-scale { margin-top: 1.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
.type-scale span {
  padding: .75rem;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-size: .8rem;
}

.type-scale b { display: block; }

/* Digital UI */
.components-section {
  width: 100%;
  padding-inline: max(1.5rem, calc((100% - var(--layout-content)) / 2));
  border-block: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
}

.component-board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.component-card {
  min-width: 0;
  min-height: 21rem;
  padding: 1.75rem;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.button-demo {
  min-height: 16rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: .8rem;
}

.dark-demo {
  color: var(--color-blue-050);
  border-color: var(--color-night-border);
  background: var(--color-night-canvas);
}

.dark-demo .meta-label { color: var(--color-gray-400); }
.event-card {
  min-height: var(--layout-tap-target);
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: .85rem;
  color: inherit;
  border-radius: var(--radius-md);
  text-decoration: none;
}

.event-date {
  width: 4rem;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  align-content: center;
  color: var(--color-night-canvas);
  border-radius: var(--radius-md);
  background: var(--color-blue-300);
  line-height: 1;
}

.event-date strong { font-size: 1.4rem; }
.event-date span { margin-top: .2rem; font-size: .62rem; font-weight: 700; letter-spacing: .1em; }
.status-chip { color: var(--color-green-200); font-size: .7rem; font-weight: 700; }
.event-card h3 { margin: .25rem 0; font-size: 1.05rem; line-height: 1.35; }
.event-card p { margin: 0; color: var(--color-gray-300); font-size: .78rem; }
.event-arrow { font-size: 1.2rem; }
.state-row { margin-top: 1.25rem; display: flex; flex-wrap: wrap; gap: .4rem; }
.state-row span {
  padding: .3rem .55rem;
  color: var(--color-gray-300);
  border: 1px solid var(--color-night-border);
  border-radius: var(--radius-pill);
  font-size: .65rem;
}

.notice-stack { margin-top: 1.5rem; display: grid; gap: .6rem; }
.notice {
  padding: .9rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .75rem;
  border-radius: var(--radius-sm);
}

.notice > span {
  width: 1.6rem;
  height: 1.6rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 700;
}

.notice strong { display: block; font-size: .9rem; }
.notice p { margin: .1rem 0 0; font-size: .78rem; }
.notice-success { color: var(--color-success-text); background: var(--color-success-surface); }
.notice-success > span { color: var(--color-success-surface); background: var(--color-success-text); }
.notice-info { color: var(--color-info-text); background: var(--color-info-surface); }
.notice-info > span { color: var(--color-info-surface); background: var(--color-info-text); }
.notice-danger { color: var(--color-danger-text); background: var(--color-danger-surface); }
.notice-danger > span { color: var(--color-danger-surface); background: var(--color-danger-text); }
.spinner { border: 2px solid currentColor; border-right-color: transparent; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Skill CTA */
.skill-section {
  width: min(calc(100% - 3rem), var(--layout-content));
  min-height: 31rem;
  margin: clamp(5.5rem, 9vw, 7.5rem) auto;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(12rem, .55fr) 1.45fr;
  overflow: hidden;
  color: var(--color-white);
  border-radius: var(--radius-lg);
  background: var(--color-surface-brand);
}

.skill-visual {
  min-height: 28rem;
  padding: 2rem;
  display: grid;
  place-items: center;
  border-right: 1px solid rgba(255,255,255,.18);
  background: transparent;
}

.skill-visual img { width: min(72%, 12rem); }
.skill-copy { padding: clamp(2.5rem, 6vw, 5rem); align-self: center; }
.skill-copy h2 {
  max-width: 16ch;
  color: var(--color-white);
  font-size: var(--text-title);
  line-height: 1.25;
}

.skill-copy > p:not(.eyebrow):not(.skill-example) {
  max-width: 38rem;
  color: rgba(255,255,255,.86);
  font-size: 1rem;
}

.install-command {
  max-width: 40rem;
  min-height: 4rem;
  margin-top: 1.75rem;
  padding: .6rem .6rem .6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: var(--radius-sm);
  background: rgba(7,28,87,.32);
}

.install-command code {
  overflow: hidden;
  font-size: .8rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.install-command button {
  min-width: 4.5rem;
  min-height: var(--layout-tap-target);
  color: var(--color-blue-900);
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--color-white);
  font-weight: 700;
  cursor: pointer;
}

.skill-example { max-width: 40rem; margin-top: 1.25rem; color: rgba(255,255,255,.74); font-size: .8rem; }

/* Resources and footer */
.resource-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
.resource-card {
  min-height: 11rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  text-decoration: none;
  transition: border-color var(--motion-fast), transform var(--motion-fast) var(--motion-ease);
}

.resource-card:hover { border-color: var(--color-action-primary); transform: translateY(-1px); }
.resource-card h3 { margin: auto 0 .2rem; padding-right: 2rem; font-size: 1.15rem; line-height: 1.35; }
.resource-card p { margin: 0; color: var(--color-text-secondary); font-size: .9rem; }
.resource-arrow { position: absolute; top: 1.25rem; right: 1.25rem; color: var(--color-text-brand); font-size: 1.15rem; }

.site-footer { color: var(--color-text-primary); border-top: 1px solid var(--color-border-subtle); background: var(--color-surface); }
.footer-inner {
  width: min(calc(100% - 3rem), var(--layout-content));
  min-height: 19rem;
  margin: 0 auto;
  padding: 3.5rem 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
}

.footer-inner img { width: 11.5rem; height: auto; }
.footer-inner > p { margin: .8rem 0 2.5rem; color: var(--color-text-secondary); font-size: 1rem; }
.footer-meta {
  width: 100%;
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--color-border-subtle);
  color: var(--color-text-muted);
  font-size: .72rem;
}

@media (max-width: 1020px) {
  .header-cta { display: none; }
  .story-panel,
  .type-panel,
  .construction-panel { grid-template-columns: 1fr; }
  .story-visual,
  .type-sample,
  .construction-visual { min-height: 22rem; border-right: 0; border-bottom: 1px solid var(--color-border-subtle); }
  .section-heading.split { grid-template-columns: 1fr; gap: 1rem; }
  .section-heading.split > p { margin-top: .5rem; }
  .component-board { grid-template-columns: 1fr 1fr; }
  .component-card:last-child { grid-column: 1 / -1; min-height: auto; }
  .notice-stack { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 4.75rem; }
  .header-inner { min-height: 4.5rem; gap: .5rem; }
  .brand-link img { width: 8rem; }
  .menu-button { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    margin: 0;
    padding: .75rem;
    flex-direction: column;
    align-items: stretch;
    border-bottom: 1px solid var(--color-border-subtle);
    background: var(--color-surface);
  }
  .site-nav[data-open="true"] { display: flex; }
  .site-nav a { padding-inline: .75rem; }

  .hero { min-height: 34rem; }
  .hero-watermark img { width: 37rem; right: -18rem; opacity: .06; }
  .hero-watermark span { left: -.35rem; font-size: 3.6rem; opacity: .065; }
  .hero-inner { width: min(calc(100% - 2rem), var(--layout-content)); padding: 5rem 0 4rem; }
  .hero h1 { max-width: 12ch; font-size: clamp(2.5rem, 12vw, 3.75rem); line-height: 1.16; letter-spacing: 0; }

  .section { width: min(calc(100% - 2rem), var(--layout-content)); padding: 5rem 0; }
  .identity-section,
  .components-section { width: 100%; padding-inline: 1rem; }
  .section-heading { margin-bottom: 2.5rem; }
  .section h2 { max-width: 13ch; line-height: 1.2; }

  .principle-grid,
  .logo-showcase,
  .color-grid,
  .component-board,
  .resource-grid { grid-template-columns: 1fr; }
  .principle-card { min-height: 12rem; }
  .logo-meta { flex-direction: column; gap: .5rem; }
  .download-group { align-items: flex-start; flex-direction: row; flex-wrap: wrap; gap: .75rem; }
  .usage-rule { grid-template-columns: 1fr; }
  .usage-rule > div + div { border-left: 0; border-top: 1px solid var(--color-border-subtle); }
  .story-list li { grid-template-columns: 1fr; gap: .2rem; }
  .color-card { min-height: 7.5rem; }
  .type-scale { grid-template-columns: 1fr; }
  .component-card,
  .component-card:last-child { grid-column: auto; min-height: auto; }
  .notice-stack { grid-template-columns: 1fr; }

  .skill-section {
    width: min(calc(100% - 2rem), var(--layout-content));
    min-height: auto;
    margin: 5rem auto;
    grid-template-columns: 1fr;
  }
  .skill-visual { display: none; }
  .skill-copy { padding: 2rem; }
  .install-command { align-items: stretch; flex-direction: column; padding: 1rem; }
  .install-command code { white-space: normal; word-break: break-all; }
  .footer-inner { width: min(calc(100% - 2rem), var(--layout-content)); }
  .footer-meta { flex-direction: column; }
}

@media (max-width: 520px) {
  .logo-pair { grid-template-columns: 1fr; }
  .logo-mode { min-height: 11rem; }
  .logo-mode + .logo-mode { border-left: 0; border-top: 1px solid var(--color-border-subtle); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
  .spinner { animation: none; border-right-color: currentColor; }
}

@media (forced-colors: active) {
  .color-card,
  .principle-card,
  .notice { border: 1px solid CanvasText; }
}