/* Hallmark 路 genre: atmospheric 路 macrostructure: Bento Grid 路 theme: Bloom
 * polish: HP3 Cursor-spotlight
 * enrichment: ambient blooms + grain
 * nav: N5 Floating pill (sticky, scroll-morph) 路 footer: Ft5 Statement
 * accent: warm amber (~3% page footprint) + secondary coral
 * studied: no
 */

/* === reset & root ============================================ */

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

html, body {
  margin: 0;
  padding: 0;
  overflow-x: clip;
}

html {
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  position: relative;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background: var(--color-paper);
  font-feature-settings: "ss01", "cv11";
  font-variant-ligatures: contextual;
}

img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

::selection {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.tnum { font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }

.skip {
  position: absolute;
  top: -40px;
  left: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-ink);
  color: var(--color-paper);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  z-index: 100;
}
.skip:focus { top: var(--space-md); }

/* === ambient ============================================ */

.ambient {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
}

.bloom {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  will-change: opacity;
}

.bloom--1 {
  top: -10vmax; left: -8vmax;
  width: 60vmax; height: 60vmax;
  background: radial-gradient(closest-side, color-mix(in oklch, var(--color-bloom-1) 50%, transparent), transparent 70%);
}

.bloom--2 {
  bottom: -20vmax; right: -15vmax;
  width: 55vmax; height: 55vmax;
  background: radial-gradient(closest-side, color-mix(in oklch, var(--color-bloom-2) 38%, transparent), transparent 70%);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns=%27http://www.w3.org/2000/svg%27 width=%27200%27 height=%27200%27%3E%3Cfilter id=%27n%27%3E%3CfeTurbulence baseFrequency=%270.9%27 numOctaves=%272%27 stitchTiles=%27stitch%27/%3E%3C/filter%3E%3Crect width=%27200%27 height=%27200%27 filter=%27url(%23n)%27 opacity=%270.6%27/%3E%3C/svg%3E");
  background-size: 200px 200px;
  opacity: 0.35;
  mix-blend-mode: overlay;
}

/* === nav ======================================================== */

.nav {
  position: sticky;
  top: var(--space-sm);
  z-index: 40;
  padding: 0 var(--page-gutter);
  pointer-events: none;
  transition: top var(--dur-slow) var(--ease-out);
}

.nav__inner {
  pointer-events: auto;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xs) var(--space-xs) var(--space-xs) var(--space-md);
  background: color-mix(in oklch, var(--color-paper) 76%, transparent);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-pill);
  transition: max-width var(--dur-slow) var(--ease-out), padding var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-slow) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.nav[data-state="scrolled"] .nav__inner {
  max-width: 56rem;
  padding: var(--space-2xs) var(--space-2xs) var(--space-2xs) var(--space-md);
  background: color-mix(in oklch, var(--color-paper) 94%, transparent);
  border-color: color-mix(in oklch, var(--color-accent) 32%, var(--color-rule-strong));
  box-shadow: 0 12px 32px -10px oklch(0% 0 0 / 0.5), 0 0 0 1px color-mix(in oklch, var(--color-accent) 12%, transparent);
  transform: scale(0.965);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: -0.01em;
  color: var(--color-ink);
  white-space: nowrap;
}

.nav__brand-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 14px color-mix(in oklch, var(--color-accent) 70%, transparent);
  animation: pulse-dot 2.4s var(--ease-in-out) infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.nav__links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-ink-2);
}

.nav__links a {
  padding: var(--space-2xs) var(--space-xs);
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
  color: var(--color-ink-2);
  text-decoration: none;
}
.nav__links a:hover { color: var(--color-ink); }
.nav__links a:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-radius: var(--radius-pill);
  border: none;
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.nav__cta:hover { transform: translateY(-1px); background: color-mix(in oklch, var(--color-accent) 88%, var(--color-ink)); }
.nav__cta:active { transform: translateY(0); }
.nav__cta:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }

.nav__cta-arrow { transition: transform var(--dur-fast) var(--ease-out); display: inline-block; }
.nav__cta:hover .nav__cta-arrow { transform: translateX(3px); }

/* === hero ==================================================== */

.hero {
  position: relative;
  isolation: isolate;
  min-height: clamp(32rem, 86dvh, 52rem);
  padding: var(--space-4xl) var(--page-gutter) var(--space-4xl);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-xl);
  overflow: hidden;
  text-align: center;
  place-items: center;
}

.hero__spotlight {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(520px circle at var(--mx, 50%) var(--my, 35%),
    color-mix(in oklch, var(--color-accent) 18%, transparent), transparent 60%);
  transition: background var(--dur-base) var(--ease-out);
  pointer-events: none;
}

.hero__rail {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-2xs) var(--space-sm) var(--space-2xs) var(--space-xs);
  background: color-mix(in oklch, var(--color-paper-2) 90%, transparent);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-pill);
  margin: 0 auto;
  width: max-content;
  max-width: 100%;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-2);
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hero__rail-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
  flex: 0 0 auto;
  animation: pulse-dot 2.4s var(--ease-in-out) infinite;
}

.hero__display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-display);
  line-height: var(--leading-display);
  letter-spacing: -0.04em;
  margin: 0 auto;
  max-width: 14ch;
  overflow-wrap: anywhere;
  min-width: 0;
}

.hero__display-line {
  display: block;
  opacity: 0;
  transform: translateY(20px) scale(0.98);
  animation: hero-rise var(--dur-slow) var(--ease-out) forwards;
}

.hero__display-line:nth-child(1) { animation-delay: 80ms; }
.hero__display-line:nth-child(2) { animation-delay: 200ms; }
.hero__display-line:nth-child(3) { animation-delay: 320ms; }

.hero__display-line em {
  font-style: italic;
  font-weight: 500;
  font-size: 1.12em;
  letter-spacing: -0.025em;
  color: var(--color-accent);
  font-feature-settings: "swsh" 1;
}

@keyframes hero-rise {
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.hero__sub {
  font-size: var(--text-lg);
  color: var(--color-ink-2);
  max-width: 52ch;
  margin: var(--space-sm) auto 0;
  line-height: var(--leading-body);
  opacity: 0;
  animation: hero-rise var(--dur-slow) var(--ease-out) 420ms forwards;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  opacity: 0;
  animation: hero-rise var(--dur-slow) var(--ease-out) 500ms forwards;
}

.hero__code-preview {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-lg);
  max-width: 64rem;
  width: 100%;
  margin: var(--space-lg) auto 0;
  text-align: left;
  align-items: start;
}

.hero__code-block {
  background: var(--color-paper);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  overflow-x: auto;
  color: var(--color-ink-2);
}

.hero__code-block pre { margin: 0; font: inherit; color: inherit; white-space: pre; tab-size: 2; }

.hero__code-prompt { color: var(--color-accent-soft); }
.hero__code-cmd { color: var(--color-ink); }
.hero__code-out { color: var(--color-ink-2); }
.hero__code-dim { color: var(--color-ink-4); }

.hero__code-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-bottom: var(--space-sm);
  display: block;
}

/* === section plumbing =========================================== */

.section-head {
  max-width: var(--max-width);
  margin: 0 auto var(--space-2xl);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xs);
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin: 0;
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-xs);
}

.section-eyebrow .num { color: var(--color-accent); font-weight: 500; }

.section-h {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-4xl);
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
  color: var(--color-ink);
  margin: 0;
  max-width: 22ch;
  overflow-wrap: anywhere;
  min-width: 0;
}

.section-sub {
  font-size: var(--text-md);
  color: var(--color-ink-2);
  max-width: var(--measure);
  margin: var(--space-xs) 0 0;
  line-height: var(--leading-body);
}

.section--dark {
  background: color-mix(in oklch, var(--color-paper-2) 80%, transparent);
}

.section--bordered {
  border-top: var(--rule-hair) solid var(--color-rule);
}

/* === about / company intro ====================================== */

.about {
  padding: var(--space-4xl) var(--page-gutter) var(--space-4xl);
  border-top: var(--rule-hair) solid var(--color-rule);
}

.about__grid {
  max-width: var(--max-width);
  margin: var(--space-2xl) auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about__body p {
  font-size: var(--text-md);
  color: var(--color-ink-2);
  line-height: var(--leading-body);
  margin: 0;
}

.about__body p strong {
  color: var(--color-ink);
  font-weight: 600;
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl);
  background: color-mix(in oklch, var(--color-paper-2) 92%, transparent);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-md);
}

.about__stat-value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-2xl);
  line-height: var(--leading-display);
  letter-spacing: -0.02em;
  color: var(--color-accent);
  margin: 0 0 var(--space-2xs);
}

.about__stat-label {
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  margin: 0;
  line-height: var(--leading-snug);
}

/* === models & research =========================================== */

.research {
  padding: var(--space-4xl) var(--page-gutter) var(--space-4xl);
  border-top: var(--rule-hair) solid var(--color-rule);
  background: linear-gradient(180deg, transparent 0%, color-mix(in oklch, var(--color-paper-2) 70%, transparent) 100%);
}

.research__grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.research__card {
  padding: var(--space-xl);
  border: var(--rule-hair) solid var(--color-rule);
  background: color-mix(in oklch, var(--color-paper-2) 92%, transparent);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.research__card:hover {
  transform: translateY(-2px);
  border-color: var(--color-rule-strong);
}

.research__card-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-xs);
}

.research__card-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0;
}

.research__card-desc {
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  line-height: var(--leading-body);
  margin: 0;
  flex: 1;
}

.research__card-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-3);
  margin: var(--space-sm) 0 0;
  padding-top: var(--space-sm);
  border-top: var(--rule-hair) solid var(--color-rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.research__card-link {
  color: var(--color-accent);
  font-size: var(--text-xs);
  transition: color var(--dur-fast) var(--ease-out);
}

.research__card-link:hover { color: var(--color-ink); }

/* === bento ==================================================== */

.bento {
  padding: var(--space-4xl) var(--page-gutter) var(--space-4xl);
  border-top: var(--rule-hair) solid var(--color-rule);
}

.bento__grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  align-items: stretch;
}

.bento__tile {
  padding: var(--space-xl);
  border: var(--rule-hair) solid var(--color-rule);
  background: color-mix(in oklch, var(--color-paper-2) 92%, transparent);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
  min-height: 10rem;
}

.bento__tile:hover {
  transform: translateY(-3px);
  border-color: var(--color-rule-strong);
  background: var(--color-paper-3);
}

.bento__tile--double-w { grid-column: span 2; }
.bento__tile--double-h { grid-row: span 2; }

.bento__tile--featured {
  background: linear-gradient(180deg, color-mix(in oklch, var(--color-accent) 8%, var(--color-paper-2)) 0%, var(--color-paper-2) 60%);
  border-color: color-mix(in oklch, var(--color-accent) 25%, var(--color-rule));
  justify-content: center;
}

.bento__tile--featured:hover {
  border-color: color-mix(in oklch, var(--color-accent) 50%, var(--color-rule-strong));
  background: linear-gradient(180deg, color-mix(in oklch, var(--color-accent) 14%, var(--color-paper-3)) 0%, var(--color-paper-3) 60%);
}

.bento__tile-accent {
  width: 28px; height: 3px; border-radius: 2px;
  background: var(--color-accent);
  margin-bottom: var(--space-2xs);
}

.bento__tile-icon {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-2xs);
  line-height: 1;
  letter-spacing: 0.02em;
}

.bento__tile-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0;
}

.bento__tile-desc {
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  line-height: var(--leading-snug);
  margin: 0;
  max-width: 45ch;
}

.bento__tile--featured .bento__tile-title { font-size: var(--text-xl); letter-spacing: -0.02em; }

.bento__tile--code {
  background: var(--color-paper);
  border-color: var(--color-rule-strong);
}
.bento__tile--code:hover { border-color: color-mix(in oklch, var(--color-accent) 30%, var(--color-rule-strong)); }

.code-block {
  background: var(--color-paper);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin-top: auto;
  overflow-x: auto;
}

.code-block pre { margin: 0; font-family: var(--font-mono); font-size: var(--text-xs); line-height: 1.65; color: var(--color-ink-2); white-space: pre; tab-size: 2; }
.code-block .hl-kw  { color: var(--color-accent-soft); }
.code-block .hl-str { color: var(--color-accent-2); }
.code-block .hl-fn  { color: var(--color-ink); }
.code-block .hl-cmt { color: var(--color-ink-4); font-style: italic; }

/* === how it works =============================================== */

.workflow {
  padding: var(--space-4xl) var(--page-gutter) var(--space-4xl);
  border-top: var(--rule-hair) solid var(--color-rule);
}

.workflow__steps {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  counter-reset: step;
}

.workflow__step {
  counter-increment: step;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.workflow__step-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-3xl);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-accent);
  opacity: 0.4;
}

.workflow__step-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0;
}

.workflow__step-desc {
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  line-height: var(--leading-snug);
  margin: 0;
}

/* === stats ==================================================== */

.stats {
  padding: var(--space-3xl) var(--page-gutter);
  border-top: var(--rule-hair) solid var(--color-rule);
}

.stats__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.stat__value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-3xl);
  line-height: var(--leading-display);
  letter-spacing: -0.03em;
  color: var(--color-ink);
  margin: 0 0 var(--space-2xs);
}

.stat__label {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-3);
  line-height: var(--leading-snug);
  margin: 0;
}

/* === platform  ========================================== */

.platform {
  padding: var(--space-4xl) var(--page-gutter) var(--space-4xl);
  border-top: var(--rule-hair) solid var(--color-rule);
  background: linear-gradient(180deg, transparent 0%, color-mix(in oklch, var(--color-paper-2) 60%, transparent) 100%);
}

.platform__grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.platform__sdk {
  padding: var(--space-xl);
  background: color-mix(in oklch, var(--color-paper-2) 92%, transparent);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.platform__sdk-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin: 0;
}

.platform__sdk-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.platform__sdk-chip {
  padding: var(--space-2xs) var(--space-sm);
  background: var(--color-paper);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-2);
}

.platform__sdk-desc {
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  line-height: var(--leading-snug);
  margin: 0;
}

.platform__terminal {
  background: var(--color-paper);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.platform__terminal pre {
  margin: 0;
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-2);
  white-space: pre;
  tab-size: 2;
}

.tp { color: var(--color-accent-soft); }
.tc { color: var(--color-ink); }
.to { color: var(--color-ink-2); }
.td { color: var(--color-ink-4); }

/* === learn ==================================================== */

.learn {
  padding: var(--space-4xl) var(--page-gutter) var(--space-4xl);
  border-top: var(--rule-hair) solid var(--color-rule);
}

.learn__grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.learn__card {
  padding: var(--space-xl);
  border: var(--rule-hair) solid var(--color-rule);
  background: color-mix(in oklch, var(--color-paper-2) 92%, transparent);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
  cursor: pointer;
}

.learn__card:hover {
  transform: translateY(-2px);
  border-color: var(--color-rule-strong);
}

.learn__card-icon {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-accent);
  margin-bottom: var(--space-2xs);
}

.learn__card-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0;
}

.learn__card-desc {
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  line-height: var(--leading-snug);
  margin: 0;
  flex: 1;
}

.learn__card-arrow {
  font-size: var(--text-sm);
  color: var(--color-ink-3);
  margin-top: auto;
  padding-top: var(--space-sm);
}

/* === faq ==================================================== */

.faq {
  padding: var(--space-4xl) var(--page-gutter);
  border-top: var(--rule-hair) solid var(--color-rule);
}

.faq__list {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.faq__item {
  border-top: var(--rule-hair) solid var(--color-rule);
}
.faq__item:last-child { border-bottom: var(--rule-hair) solid var(--color-rule); }

.faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-lg) 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  transition: color var(--dur-fast) var(--ease-out);
}

.faq__item summary::-webkit-details-marker { display: none; }

.faq__item summary span:first-child { flex: 1; min-width: 0; }
.faq__item summary:hover { color: var(--color-accent); }
.faq__item summary:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 4px; border-radius: var(--radius-xs); }

.faq__chev {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  color: var(--color-ink-3);
  transition: transform var(--dur-base) var(--ease-out);
  font-weight: 400;
  flex: 0 0 auto;
  line-height: 1;
}

.faq__item[open] .faq__chev { transform: rotate(45deg); color: var(--color-accent); }

.faq__a {
  padding: 0 0 var(--space-lg);
  max-width: 60ch;
  color: var(--color-ink-2);
  font-size: var(--text-md);
  line-height: var(--leading-body);
}

.faq__a p { margin: 0; }

/* === cta ==================================================== */

.cta-strip {
  padding: var(--space-5xl) var(--page-gutter);
  border-top: var(--rule-hair) solid var(--color-rule);
  text-align: center;
}

.cta-strip__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.cta-strip__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-4xl);
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
  color: var(--color-ink);
  margin: 0 auto var(--space-md);
  max-width: 18ch;
}

.cta-strip__desc {
  font-size: var(--text-md);
  color: var(--color-ink-2);
  max-width: 50ch;
  margin: 0 auto var(--space-2xl);
  line-height: var(--leading-body);
}

.cta-strip__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-md);
  white-space: nowrap;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
  cursor: pointer;
  border: var(--rule-hair) solid transparent;
  letter-spacing: -0.01em;
}

.cta--primary {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  box-shadow: 0 6px 28px -8px color-mix(in oklch, var(--color-accent) 50%, transparent);
}
.cta--primary:hover {
  transform: translateY(-2px);
  background: color-mix(in oklch, var(--color-accent) 88%, var(--color-ink));
  box-shadow: 0 10px 36px -8px color-mix(in oklch, var(--color-accent) 65%, transparent);
}
.cta--primary:active { transform: translateY(0); }

.cta--secondary {
  background: transparent;
  color: var(--color-ink-2);
  border-color: var(--color-rule-strong);
}
.cta--secondary:hover { border-color: var(--color-ink-2); color: var(--color-ink); transform: translateY(-1px); }
.cta--secondary:active { transform: translateY(0); }

.cta:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }

.cta__arrow { transition: transform var(--dur-fast) var(--ease-out); display: inline-block; }
.cta:hover .cta__arrow { transform: translateX(3px); }

/* === footer ==================================================== */

.footer {
  padding: var(--space-3xl) var(--page-gutter) var(--space-2xl);
  border-top: var(--rule-hair) solid var(--color-rule);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer__statement {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-3xl);
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-ink);
  margin: 0 0 var(--space-3xl);
  max-width: 24ch;
  overflow-wrap: anywhere;
  min-width: 0;
}

.footer__statement em {
  font-style: italic;
  color: var(--color-accent);
  font-weight: 600;
  font-feature-settings: "swsh" 1;
}

.footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-2xl);
  align-items: baseline;
  justify-content: space-between;
  padding-top: var(--space-lg);
  border-top: var(--rule-hair) solid var(--color-rule);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-ink-3);
  letter-spacing: 0.03em;
}

.footer__line { margin: 0; }

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__links a {
  color: var(--color-ink-3);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.footer__links a:hover { color: var(--color-ink); }
.footer__links a:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; border-radius: var(--radius-xs); }

/* === reveal ============================================= */

.reveal-section { opacity: 0; transform: translateY(16px); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
.reveal-section.is-visible { opacity: 1; transform: translateY(0); }

/* === global focus ====================================== */

:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
:focus:not(:focus-visible) { outline: none; }

/* === responsive ======================================== */

@media (max-width: 64rem) {
  .bento__grid { grid-template-columns: repeat(3, 1fr); }
  .bento__tile--double-w { grid-column: span 2; }
  .bento__tile--double-h { grid-row: span 1; }
  .about__grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .research__grid { grid-template-columns: repeat(2, 1fr); }
  .learn__grid { grid-template-columns: repeat(2, 1fr); }
  .workflow__steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 48rem) {
  .nav__inner { padding: var(--space-2xs) var(--space-2xs) var(--space-2xs) var(--space-md); }
  .nav__links { display: none; }
  .nav__cta { font-size: var(--text-xs); padding: var(--space-2xs) var(--space-md); }

  .hero { min-height: clamp(28rem, 76dvh, 40rem); padding: var(--space-2xl) var(--page-gutter); }
  .hero__code-preview { grid-template-columns: 1fr; }
  .hero__code-block:nth-child(2) { display: none; }

  .section-h { font-size: var(--text-3xl); }
  .stats__inner { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
  .platform__grid { grid-template-columns: 1fr; }

  .bento__grid { grid-template-columns: repeat(2, 1fr); }
  .bento__tile--double-w { grid-column: span 2; }

  .footer__statement { font-size: var(--text-2xl); }
  .footer__meta { flex-direction: column; align-items: flex-start; gap: var(--space-sm); }
}

@media (max-width: 26rem) {
  .bento__grid { grid-template-columns: 1fr; }
  .bento__tile--double-w { grid-column: span 1; }
  .bento__tile--double-h { grid-row: span 1; }
  .research__grid { grid-template-columns: 1fr; }
  .learn__grid { grid-template-columns: 1fr; }
  .workflow__steps { grid-template-columns: 1fr; }
  .stats__inner { grid-template-columns: 1fr; }
  .about__stats { grid-template-columns: 1fr; }
  .hero__display { font-size: clamp(2rem, 14vw, 3rem); }
  .cta-strip__actions { flex-direction: column; width: 100%; }
  .cta { width: 100%; justify-content: center; }
}

/* === reduced motion ==================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .hero__display-line { opacity: 1; transform: none; animation: none; }
  .hero__sub { opacity: 1; animation: none; }
  .hero__actions { opacity: 1; animation: none; }
  .hero__spotlight { transition: none; --mx: 50%; --my: 35%; }
  .nav__brand-dot, .hero__rail-dot { animation: none; opacity: 1; }
  .bloom { opacity: 0.25; }
  .bento__tile:hover, .research__card:hover, .learn__card:hover { transform: none; }
  .cta:hover { transform: none; }
  .reveal-section { opacity: 1; transform: none; transition: none; }
}