/*
  Build — shared foundation
  Visual direction: modern minimal / linear, Apple-inspired
*/

:root {
  color-scheme: light;
  --bg: oklch(99% 0.002 240);
  --surface: oklch(100% 0 0);
  --surface-elevated: oklch(97.5% 0.003 240);
  --surface-strong: oklch(95.5% 0.004 240);
  --fg: oklch(18% 0.012 250);
  --muted: oklch(54% 0.012 250);
  --border: oklch(92% 0.005 250);
  --border-strong: oklch(86% 0.008 250);
  --accent: oklch(58% 0.18 255);
  --accent-strong: oklch(52% 0.2 255);
  --accent-soft: oklch(94% 0.03 255);
  --success: oklch(66% 0.12 155);
  --warning: oklch(78% 0.12 80);
  --shadow: 0 14px 30px rgba(16, 24, 40, 0.06);
  --shadow-soft: 0 8px 20px rgba(16, 24, 40, 0.04);
  --radius-xs: 10px;
  --radius-sm: 14px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 30px;
  --container: 1200px;
  --container-narrow: 980px;
  --header-h: 76px;
  --gutter: clamp(1rem, 0.7rem + 1vw, 1.5rem);
  --section-y: clamp(4rem, 6vw, 6.5rem);
  --section-gap: clamp(1.15rem, 1vw, 1.5rem);
  --grid-gap: clamp(0.9rem, 0.9vw, 1.25rem);
  --content-gap: clamp(1rem, 1.2vw, 1.5rem);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --focus: 0 0 0 4px color-mix(in oklch, var(--accent) 18%, white);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
  --body: -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--body);
  color: var(--fg);
  background:
    radial-gradient(1200px 600px at 20% -10%, color-mix(in oklch, var(--accent) 7%, transparent), transparent 60%),
    radial-gradient(900px 420px at 92% 8%, rgba(255,255,255,0.9), transparent 65%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
::selection { background: color-mix(in oklch, var(--accent) 18%, white); }

.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  padding: 0.85rem 1rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  transform: translateY(-180%);
  transition: transform 180ms var(--ease-out);
}
.skip-link:focus { transform: translateY(0); outline: none; box-shadow: var(--focus); }

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

.site-shell {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: saturate(180%) blur(18px);
  background: color-mix(in oklch, var(--bg) 84%, transparent);
  border-bottom: 1px solid color-mix(in oklch, var(--border) 70%, transparent);
}

.header-row {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.brand-mark {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.9rem;
  background:
    linear-gradient(135deg, color-mix(in oklch, var(--accent) 94%, white), var(--accent-strong));
  box-shadow: 0 10px 24px rgba(35, 95, 255, 0.18);
  position: relative;
  flex: none;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 0.48rem;
  border-radius: 0.55rem;
  border: 1px solid rgba(255,255,255,0.55);
}
.brand-wordmark {
  font-family: var(--display);
  font-weight: 650;
  font-size: 1rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.brand-subtitle {
  font-size: 0.88rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a,
.nav button,
.site-footer a {
  transition: transform 180ms var(--ease-out), background-color 180ms var(--ease-out), border-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.nav-link,
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.6rem;
  padding: 0.7rem 0.95rem;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  background: transparent;
}
.nav-link:hover,
.nav-toggle:hover,
.nav-link:focus-visible,
.nav-toggle:focus-visible,
.action-link:hover,
.action-link:focus-visible {
  color: var(--fg);
  background: color-mix(in oklch, var(--surface) 92%, white);
  border-color: var(--border);
  box-shadow: var(--shadow-soft);
  outline: none;
}
.nav-link[aria-current="page"],
.nav-link.is-active {
  color: var(--fg);
  background: var(--surface);
  border-color: var(--border);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}
.nav-link:focus-visible,
.nav-toggle:focus-visible,
.action-link:focus-visible,
.button:focus-visible,
.input:focus-visible,
.select:focus-visible,
.textarea:focus-visible,
.checkbox:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.nav-toggle {
  display: none;
  cursor: pointer;
}
.nav-toggle .icon-bar {
  width: 1rem;
  height: 1px;
  background: currentColor;
  border-radius: 999px;
  display: block;
  position: relative;
}
.nav-toggle .icon-bar::before,
.nav-toggle .icon-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 1rem;
  height: 1px;
  background: currentColor;
  border-radius: 999px;
}
.nav-toggle .icon-bar::before { top: -0.34rem; }
.nav-toggle .icon-bar::after { top: 0.34rem; }

.nav-panel {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.hero {
  padding: clamp(2.4rem, 6vw, 4.75rem) 0 clamp(2rem, 5vw, 3.5rem);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: clamp(1.3rem, 3vw, 2rem);
  align-items: stretch;
}
.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  padding-right: clamp(0rem, 1vw, 1rem);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  width: fit-content;
  padding: 0.45rem 0.72rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklch, var(--surface) 84%, white);
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}
.eyebrow::before {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--accent) 16%, transparent);
}
.hero h1,
.page-title {
  margin: 0;
  font-family: var(--display);
  letter-spacing: -0.045em;
  line-height: 1.03;
  max-width: 12ch;
  overflow-wrap: anywhere;
}
.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5.8rem);
}
.page-title {
  font-size: clamp(2.2rem, 4.6vw, 4rem);
}
.hero-lede,
.page-lede {
  margin: 0;
  font-size: clamp(1.03rem, 0.96rem + 0.4vw, 1.2rem);
  line-height: 1.55;
  color: var(--muted);
  max-width: 62ch;
}
.hero-actions,
.page-actions,
.inline-actions,
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}
.button,
.action-link,
.pill,
.chip,
.tag,
.filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 999px;
  min-height: 2.7rem;
  border: 1px solid var(--border);
  padding: 0.72rem 1rem;
  background: var(--surface);
}
.button {
  color: var(--fg);
  border-color: color-mix(in oklch, var(--accent) 22%, var(--border));
  background: linear-gradient(180deg, color-mix(in oklch, var(--accent) 10%, white), white);
}
.button--primary {
  color: white;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  border-color: color-mix(in oklch, var(--accent) 70%, black);
  box-shadow: 0 12px 28px rgba(29, 78, 216, 0.22);
}
.button--secondary {
  color: var(--fg);
  background: color-mix(in oklch, var(--surface) 92%, white);
}
.button--ghost {
  color: var(--muted);
}
.button:hover,
.action-link:hover,
.button:focus-visible,
.action-link:focus-visible {
  transform: translateY(-1px);
}
.button small,
.action-link small {
  color: inherit;
  opacity: 0.72;
}

.hero-rail {
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 1rem;
  min-width: 0;
}
.hero-panel,
.card,
.proof-panel,
.section-panel,
.form-panel,
.blog-card,
.detail-card,
.stat-card,
.info-card {
  background: color-mix(in oklch, var(--surface) 96%, white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}
.hero-panel {
  padding: clamp(1rem, 2vw, 1.35rem);
}
.hero-panel--metric {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}
.metric {
  padding: 1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, var(--surface), color-mix(in oklch, var(--surface) 90%, white));
  border: 1px solid var(--border);
}
.metric .kicker {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 0.45rem;
}
.metric .value {
  font-family: var(--display);
  font-size: clamp(1.35rem, 2.2vw, 2rem);
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.metric .note {
  margin-top: 0.45rem;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.45;
}
.visual-stack {
  display: grid;
  gap: 1rem;
}
.diagram {
  position: relative;
  overflow: hidden;
  min-height: 320px;
  padding: clamp(1rem, 2vw, 1.4rem);
  background:
    radial-gradient(220px 220px at 25% 20%, color-mix(in oklch, var(--accent) 16%, transparent), transparent 70%),
    radial-gradient(280px 260px at 80% 18%, rgba(255,255,255,0.8), transparent 65%),
    linear-gradient(180deg, color-mix(in oklch, var(--surface) 98%, white), color-mix(in oklch, var(--surface) 92%, white));
}
.diagram::before,
.diagram::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  inset: auto;
  pointer-events: none;
}
.diagram::before {
  width: 14rem;
  height: 14rem;
  left: -2.5rem;
  bottom: -4.5rem;
  border: 1px solid color-mix(in oklch, var(--accent) 30%, white);
  opacity: 0.7;
}
.diagram::after {
  width: 9rem;
  height: 9rem;
  right: 1.2rem;
  top: 1.2rem;
  border: 1px solid var(--border);
}
.diagram-grid {
  position: relative;
  z-index: 1;
  height: 100%;
  display: grid;
  grid-template-columns: 1fr 0.92fr;
  gap: 1rem;
}
.diagram-card {
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.8);
  border: 1px solid color-mix(in oklch, var(--border) 88%, white);
  padding: 1rem;
  min-height: 0;
}
.diagram-card--hero {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.diagram-label {
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 0.45rem;
}
.diagram-title {
  margin: 0;
  font-family: var(--display);
  letter-spacing: -0.03em;
  font-size: 1.2rem;
  line-height: 1.1;
}
.diagram-copy {
  margin: 0.6rem 0 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.92rem;
}
.diagram-bands {
  display: grid;
  gap: 0.8rem;
}
.band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.85rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: color-mix(in oklch, var(--surface) 92%, white);
}
.band strong {
  display: block;
  font-size: 0.92rem;
}
.band span {
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
}
.band .swatch {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 999px;
  background: linear-gradient(180deg, color-mix(in oklch, var(--accent) 95%, white), var(--accent-strong));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.6);
}

.section {
  padding: var(--section-y) 0;
}
.section + .section { padding-top: 0; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: clamp(1.1rem, 2vw, 1.8rem);
}
.section-head h2,
.section-head h3 {
  margin: 0;
  font-family: var(--display);
  letter-spacing: -0.04em;
  line-height: 1.08;
}
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.6rem); }
.section-head h3 { font-size: clamp(1.3rem, 2.5vw, 2rem); }
.section-head p {
  margin: 0;
  max-width: 56ch;
  color: var(--muted);
  line-height: 1.55;
}

.grid-3,
.grid-4,
.route-grid,
.support-grid,
.feature-grid,
.blog-grid,
.collection-grid,
.sitemap-grid {
  display: grid;
  gap: var(--grid-gap);
}
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.route-grid { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.card,
.proof-panel,
.section-panel,
.form-panel,
.detail-card,
.info-card,
.blog-card,
.stat-card {
  padding: clamp(1rem, 1.6vw, 1.35rem);
}
.card,
.info-card,
.stat-card { min-width: 0; }
.card__eyebrow {
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 0.65rem;
}
.card h3,
.card h4,
.blog-card h3,
.detail-card h3,
.info-card h3,
.stat-card h3 {
  margin: 0;
  font-family: var(--display);
  letter-spacing: -0.03em;
  line-height: 1.12;
}
.card h3 { font-size: 1.18rem; }
.card p,
.info-card p,
.stat-card p,
.blog-card p,
.detail-card p,
.proof-panel p,
.form-panel p {
  margin: 0.68rem 0 0;
  color: var(--muted);
  line-height: 1.6;
}
.card ul,
.detail-card ul,
.proof-panel ul,
.content-list,
.timeline-list,
.check-list,
.resource-list {
  margin: 0.95rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}
.card li,
.detail-card li,
.proof-panel li,
.check-list li,
.resource-list li,
.timeline-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem;
  align-items: start;
  color: var(--fg);
}
.card li::before,
.detail-card li::before,
.proof-panel li::before,
.check-list li::before,
.resource-list li::before,
.timeline-list li::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  margin-top: 0.52rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--accent) 12%, transparent);
}

.value-pair {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
}
.value-pair .meta {
  color: var(--muted);
  font-size: 0.9rem;
}
.value-pair .emphasis {
  font-family: var(--display);
  letter-spacing: -0.04em;
  font-size: clamp(1.15rem, 1.1rem + 0.8vw, 1.8rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.proof-panel {
  display: grid;
  gap: 1rem;
}
.proof-top {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
  align-items: start;
}
.proof-meter {
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in oklch, var(--surface) 98%, white), color-mix(in oklch, var(--surface) 92%, white));
}
.proof-meter .kicker { display: block; color: var(--muted); font-size: 0.8rem; margin-bottom: 0.35rem; }
.proof-meter .headline {
  margin: 0;
  font-family: var(--display);
  letter-spacing: -0.04em;
  line-height: 1.05;
  font-size: clamp(1.4rem, 1.2rem + 1.4vw, 2.2rem);
}
.proof-meter .subtext {
  margin: 0.5rem 0 0;
  color: var(--muted);
  line-height: 1.55;
}
.proof-stack {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}
.stat-card .stat {
  font-family: var(--display);
  letter-spacing: -0.04em;
  font-size: clamp(1.35rem, 1.1rem + 1vw, 2rem);
  line-height: 1;
  margin-bottom: 0.35rem;
  font-variant-numeric: tabular-nums;
}
.stat-card .label {
  color: var(--muted);
  font-size: 0.86rem;
  margin-bottom: 0.4rem;
}
.stat-card .description {
  color: var(--fg);
  line-height: 1.5;
  margin: 0;
}

.form-panel {
  display: grid;
  gap: 1rem;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}
.field {
  display: grid;
  gap: 0.45rem;
}
.label {
  font-size: 0.86rem;
  color: var(--muted);
}
.input,
.select,
.textarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in oklch, var(--surface) 96%, white);
  color: var(--fg);
  padding: 0.9rem 1rem;
  min-height: 3rem;
  transition: border-color 180ms var(--ease-out), box-shadow 180ms var(--ease-out), transform 180ms var(--ease-out);
}
.textarea { min-height: 8.5rem; resize: vertical; }
.input::placeholder,
.textarea::placeholder { color: color-mix(in oklch, var(--muted) 80%, white); }
.input:hover,
.select:hover,
.textarea:hover {
  border-color: var(--border-strong);
}
.consent-row {
  display: flex;
  align-items: start;
  gap: 0.75rem;
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.92rem;
}
.checkbox {
  margin-top: 0.2rem;
  width: 1rem;
  height: 1rem;
  border-radius: 0.28rem;
  border: 1px solid var(--border-strong);
  background: white;
  appearance: none;
  display: grid;
  place-items: center;
}
.checkbox:checked {
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  border-color: var(--accent-strong);
}
.checkbox:checked::after {
  content: "";
  width: 0.36rem;
  height: 0.62rem;
  border: 2px solid white;
  border-top: 0;
  border-left: 0;
  transform: rotate(45deg) translate(-0.06rem, -0.08rem);
}
.form-help {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

.collection-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.filter-chip {
  cursor: pointer;
  color: var(--muted);
  background: var(--surface);
}
.filter-chip[aria-pressed="true"],
.filter-chip.is-active {
  color: var(--fg);
  border-color: color-mix(in oklch, var(--accent) 24%, var(--border));
  background: color-mix(in oklch, var(--accent) 8%, white);
}

[data-shpitto-blog-root] {
  display: block;
}
[data-shpitto-blog-list] {
  display: grid;
  gap: var(--grid-gap);
}
.blog-grid {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}
.blog-card {
  grid-column: span 4;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1.1rem;
  min-width: 0;
}
.blog-card__top,
.detail-top,
.card-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
}
.blog-card__meta,
.detail-meta,
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.84rem;
}
.blog-card__title {
  margin: 0;
  font-family: var(--display);
  letter-spacing: -0.035em;
  line-height: 1.1;
  font-size: clamp(1.15rem, 0.95rem + 0.55vw, 1.55rem);
}
.blog-card__excerpt {
  margin: 0;
  color: var(--muted);
  line-height: 1.58;
}
.blog-card__footer,
.detail-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.blog-card__link,
.detail-link,
.text-link {
  color: var(--accent-strong);
  font-weight: 600;
}
.blog-card__link:hover,
.detail-link:hover,
.text-link:hover { text-decoration: underline; }
.blog-card__tags,
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tag {
  min-height: 2rem;
  padding: 0.38rem 0.7rem;
  color: var(--muted);
  background: color-mix(in oklch, var(--surface) 94%, white);
  font-size: 0.82rem;
}

.detail-hero {
  padding: clamp(2rem, 4vw, 3rem) 0 clamp(1rem, 2vw, 1.5rem);
}
.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: clamp(1rem, 2vw, 1.5rem);
}
.detail-article {
  display: grid;
  gap: 1rem;
}
.article-body {
  display: grid;
  gap: 1rem;
}
.article-body h2,
.article-body h3 {
  margin: 0;
  font-family: var(--display);
  letter-spacing: -0.03em;
  line-height: 1.14;
}
.article-body h2 { font-size: clamp(1.35rem, 2.4vw, 2rem); }
.article-body h3 { font-size: 1.2rem; }
.article-body p,
.article-body li {
  color: var(--fg);
  line-height: 1.7;
}
.article-body .lead {
  font-size: 1.08rem;
  color: var(--muted);
}

.site-footer {
  margin-top: auto;
  padding: clamp(2rem, 5vw, 3.5rem) 0;
  border-top: 1px solid color-mix(in oklch, var(--border) 75%, transparent);
  background: color-mix(in oklch, var(--bg) 88%, white);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(2, minmax(0, 0.6fr)) 1fr;
  gap: 1.2rem;
  align-items: start;
}
.footer-brand {
  display: grid;
  gap: 0.85rem;
}
.footer-brand p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}
.footer-heading {
  margin: 0 0 0.8rem;
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.footer-links {
  display: grid;
  gap: 0.65rem;
}
.footer-links a {
  color: var(--fg);
  width: fit-content;
}
.footer-links a:hover { color: var(--accent-strong); }
.footer-note {
  display: grid;
  gap: 0.75rem;
  justify-items: start;
}
.footer-note p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}
.footer-bottom {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  flex-wrap: wrap;
  font-size: 0.88rem;
}

.muted { color: var(--muted); }
.hidden { display: none !important; }
.center { text-align: center; }
.stack { display: grid; gap: 1rem; }
.stack-sm { display: grid; gap: 0.6rem; }
.inline-note { color: var(--muted); font-size: 0.86rem; }
.divider {
  height: 1px;
  background: var(--border);
  border: 0;
  margin: 0;
}

.route-band {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap);
}
.route-band > * { grid-column: span 6; }

.support-card {
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: color-mix(in oklch, var(--surface) 95%, white);
}
.support-card h4 { margin: 0; font-size: 1rem; font-family: var(--display); letter-spacing: -0.03em; }
.support-card p { margin: 0.55rem 0 0; color: var(--muted); line-height: 1.55; }

.hero-proofline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  color: var(--muted);
  font-size: 0.88rem;
}
.hero-proofline span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.hero-proofline span::before {
  content: "";
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 999px;
  background: var(--accent);
}

.small-kicker {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

[data-route-label]::after {
  content: attr(data-route-label);
}

[data-badge] {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklch, var(--surface) 94%, white);
  color: var(--muted);
  font-size: 0.8rem;
}

/* Responsive adjustments */
@media (max-width: 1100px) {
  .hero-grid,
  .detail-layout,
  .proof-top,
  .footer-grid,
  .route-band,
  .diagram-grid {
    grid-template-columns: 1fr;
  }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .blog-card { grid-column: span 6; }
  .hero-copy { padding-right: 0; }
  .hero-rail { order: -1; }
}

@media (max-width: 820px) {
  :root { --header-h: 68px; }
  .nav-toggle { display: inline-flex; }
  .nav-panel {
    position: absolute;
    top: calc(var(--header-h) - 0.2rem);
    right: var(--gutter);
    left: var(--gutter);
    display: grid;
    gap: 0.45rem;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: color-mix(in oklch, var(--bg) 92%, white);
    box-shadow: var(--shadow);
    transform-origin: top right;
    transform: scaleY(0.92) translateY(-0.35rem);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out), visibility 180ms var(--ease-out);
    flex-wrap: nowrap;
    justify-content: stretch;
  }
  .nav-panel.is-open {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
    transform: scaleY(1) translateY(0);
  }
  .nav-panel .nav-link,
  .nav-panel .action-link,
  .nav-panel .button {
    width: 100%;
    justify-content: center;
  }
  .header-row {
    position: relative;
  }
  .brand-subtitle { display: none; }
  .hero { padding-top: 1.8rem; }
  .hero h1 { max-width: 11ch; }
  .form-grid,
  .proof-stack,
  .grid-4,
  .grid-3 { grid-template-columns: 1fr; }
  .blog-card { grid-column: span 12; }
  .section-head { flex-direction: column; align-items: start; }
  .value-pair { grid-template-columns: 1fr; }
  .hero-panel--metric { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 560px) {
  .container,
  .container--narrow { width: min(100% - 1.2rem, var(--container)); }
  .hero { padding-top: 1.4rem; }
  .hero h1,
  .page-title { max-width: 10.2ch; }
  .button,
  .nav-link,
  .action-link,
  .filter-chip { width: 100%; }
  .hero-actions,
  .page-actions,
  .inline-actions,
  .form-actions { align-items: stretch; }
  .hero-proofline { gap: 0.45rem 0.8rem; }
  .hero-panel,
  .card,
  .proof-panel,
  .section-panel,
  .form-panel,
  .blog-card,
  .detail-card,
  .info-card,
  .stat-card { border-radius: 20px; }
  .diagram { min-height: 280px; }
  .diagram-grid { gap: 0.8rem; }
}

@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;
  }
}

/* runtime-blog-card-padding-fix */
.blog-card {
  padding: max(1.25rem, 20px);
  display: grid;
  gap: 0.875rem;
}