:root {
  color-scheme: light;

  --bg: #F7F4EF;
  --surface: #FFFFFF;
  --surface-accent: #FFFFFF;
  --border: #E3DED4;
  --border-strong: #D5CFC2;
  --border-soft: #CFC8B9;

  --brand: #2C4A3B;
  --brand-text: #24503C;
  --heading: #1C2B24;
  --body-text: #4F4B42;
  --muted: #6E6A5F;
  --muted-2: #7A7568;

  --accent: #C0472B;
  --accent-soft-bg: #FDF6EE;
  --accent-current-text: #8E3319;
  --accent-current-muted: #A8654E;
  --danger: #B3352F;
  --milestone-border: #A9BDAE;

  --grid-line: rgba(44, 74, 59, .055);

  --font-heading: 'Archivo', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-brand: 'Poppins', sans-serif;
}

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

  --bg: #04141A;
  --surface: #061A1F;
  --surface-accent: #08191F;
  --border: #123039;
  --border-strong: #1C4750;
  --border-soft: #2A4A52;

  --brand: #5EEAD4;
  --brand-text: #9DF5E7;
  --heading: #EAFCF8;
  --body-text: #A8C4BE;
  --muted: #6E8A85;
  --muted-2: #3E6B6B;

  --accent: #FFC46B;
  --accent-soft-bg: #191A12;
  --accent-current-text: #FFE7C4;
  --accent-current-muted: #C99A5E;
  --danger: #FF6B6B;
  --milestone-border: #2A6A66;

  --grid-line: rgba(94, 234, 212, .035);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    color-scheme: dark;

    --bg: #04141A;
    --surface: #061A1F;
    --surface-accent: #08191F;
    --border: #123039;
    --border-strong: #1C4750;
    --border-soft: #2A4A52;

    --brand: #5EEAD4;
    --brand-text: #9DF5E7;
    --heading: #EAFCF8;
    --body-text: #A8C4BE;
    --muted: #6E8A85;
    --muted-2: #3E6B6B;

    --accent: #FFC46B;
    --accent-soft-bg: #191A12;
    --accent-current-text: #FFE7C4;
    --accent-current-muted: #C99A5E;
    --danger: #FF6B6B;
    --milestone-border: #2A6A66;

    --grid-line: rgba(94, 234, 212, .035);
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  background: var(--bg);
}

body {
  font-family: var(--font-body);
  color: var(--body-text);
  transition: background-color .15s ease, color .15s ease;
}

a { color: inherit; text-decoration: none; }

.page {
  max-width: 1440px;
  margin: 0 auto;
  background: var(--bg);
  overflow: hidden;
}

.mono { font-family: var(--font-mono); }

.eyebrow {
  font: 400 9.5px/1 var(--font-mono);
  letter-spacing: .2em;
  color: var(--muted);
  text-transform: uppercase;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-strong);
  padding: 15px 24px;
  font: 500 12px/1 var(--font-mono);
  letter-spacing: .16em;
  color: var(--body-text);
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  border-color: var(--brand);
  background: var(--surface-accent);
  color: var(--heading);
}

.btn-small {
  padding: 9px 16px;
  font-size: 11px;
}

/* ---------- NAV ---------- */

.nav {
  min-height: 74px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 40px;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 13px;
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-brand-name {
  font: 600 19px/1 var(--font-brand);
  letter-spacing: -.005em;
  color: var(--heading);
}

.nav-brand-tagline {
  font: 400 7.5px/1 var(--font-mono);
  letter-spacing: .24em;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-link {
  font: 400 13px/1 var(--font-body);
  color: var(--body-text);
}

.nav-sep {
  width: 1px;
  height: 22px;
  background: var(--border-strong);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

@media (max-width: 900px) {
  .nav-links { display: none; }
}

/* ---------- theme switch ---------- */

.theme-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-strong);
  padding: 3px;
  gap: 2px;
}

.theme-switch button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.theme-switch button svg { width: 14px; height: 14px; }

.theme-switch button[aria-pressed="true"] {
  background: var(--brand);
  color: var(--bg);
}

/* ---------- HERO ---------- */

.hero {
  padding: 88px 40px 96px;
  display: flex;
  gap: 64px;
  align-items: flex-start;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 26px 26px;
}

.hero-copy {
  width: 560px;
  max-width: 100%;
  flex: none;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  align-self: flex-start;
  border: 1px solid var(--border-strong);
  padding: 6px 11px;
}

.hero-badge-dot {
  width: 5px;
  height: 5px;
  background: var(--brand);
  flex: none;
}

.hero-badge-text {
  font: 400 9.5px/1 var(--font-mono);
  letter-spacing: .18em;
  color: var(--muted);
}

.hero h1 {
  font: 600 56px/1.07 var(--font-heading);
  letter-spacing: -.025em;
  color: var(--heading);
  text-wrap: pretty;
}

.hero p {
  font: 400 16.5px/1.65 var(--font-body);
  color: var(--body-text);
  max-width: 480px;
  text-wrap: pretty;
}

.hero p code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--brand-text);
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
  flex-wrap: wrap;
}

.hero-facts {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.hero-fact {
  font: 400 10.5px/1.5 var(--font-mono);
  letter-spacing: .1em;
  color: var(--muted);
}

.hero-fact-sep {
  width: 1px;
  height: 12px;
  background: var(--border-strong);
}

/* code panel */

.code-panel {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--border-strong);
  background: var(--surface);
}

.code-panel-head {
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.code-panel-head .filename {
  font: 400 10px/1 var(--font-mono);
  letter-spacing: .06em;
  color: var(--body-text);
}

.code-panel-head .meta {
  font: 400 8.5px/1 var(--font-mono);
  letter-spacing: .14em;
  color: var(--muted);
}

.code-panel-body {
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  overflow-x: auto;
}

.code-line {
  display: flex;
  gap: 12px;
  padding: 0 16px;
  white-space: pre;
}

.code-line .ln {
  width: 14px;
  flex: none;
  text-align: right;
  font: 400 9px/19px var(--font-mono);
  color: var(--muted-2);
}

.code-line .code {
  font: 400 10.5px/19px var(--font-mono);
  color: var(--body-text);
}

.tok-kw { color: var(--brand); }
.tok-id { color: var(--heading); }
.tok-str { color: var(--brand-text); }
.tok-tech { color: var(--accent); }
.tok-comment { color: var(--muted); }

.code-panel-foot {
  border-top: 1px solid var(--border);
  padding: 11px 16px;
  display: flex;
  align-items: center;
  gap: 9px;
}

.code-panel-foot .dot {
  width: 5px;
  height: 5px;
  background: var(--brand);
  flex: none;
}

.code-panel-foot .label {
  font: 400 8.5px/1 var(--font-mono);
  letter-spacing: .12em;
  color: var(--muted);
}

@media (max-width: 960px) {
  .hero { flex-direction: column; }
  .hero-copy { width: 100%; }
}

/* ---------- section shells ---------- */

section {
  border-top: 1px solid var(--border);
  padding: 84px 40px;
}

section.no-border { border-top: none; }
section.on-surface { background: var(--surface); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 660px;
  margin-bottom: 44px;
}

.section-head h2 {
  font: 600 34px/1.15 var(--font-heading);
  letter-spacing: -.02em;
  color: var(--heading);
  text-wrap: pretty;
}

.section-head p {
  font: 400 14.5px/1.65 var(--font-body);
  color: var(--body-text);
  text-wrap: pretty;
}

/* ---------- PILIERS (why nanko) ---------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
}

.pillar {
  background: var(--bg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pillar .num {
  font: 400 9px/1 var(--font-mono);
  letter-spacing: .2em;
  color: var(--accent);
}

.pillar h3 {
  font: 600 19px/1.25 var(--font-heading);
  letter-spacing: -.01em;
  color: var(--heading);
}

.pillar p {
  font: 400 13.5px/1.65 var(--font-body);
  color: var(--body-text);
  text-wrap: pretty;
}

.pillar code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--brand-text);
}

@media (max-width: 900px) {
  .pillars { grid-template-columns: 1fr; }
}

/* ---------- VOCAB ---------- */

.split {
  display: flex;
  gap: 64px;
  align-items: flex-start;
}

.split-side {
  width: 420px;
  flex: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.split-side h2 {
  font: 600 30px/1.18 var(--font-heading);
  letter-spacing: -.02em;
  color: var(--heading);
  text-wrap: pretty;
}

.split-side p {
  font: 400 14.5px/1.65 var(--font-body);
  color: var(--body-text);
  text-wrap: pretty;
}

.split-side p code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--brand-text);
}

.vocab-list {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
}

.vocab-row {
  background: var(--surface);
  padding: 18px 22px;
  display: flex;
  align-items: baseline;
  gap: 24px;
  flex-wrap: wrap;
}

.vocab-term {
  width: 140px;
  flex: none;
  font: 500 13px/1.4 var(--font-mono);
  color: var(--brand);
}

.vocab-term.accent { color: var(--accent); }

.vocab-def {
  flex: 1;
  min-width: 200px;
  font: 400 13.5px/1.6 var(--font-body);
  color: var(--body-text);
}

.vocab-def code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--heading);
}

@media (max-width: 960px) {
  .split { flex-direction: column; }
  .split-side { width: 100%; }
}

/* ---------- MIGRATIONS ---------- */

.migrations-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.migrations-head .copy {
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.migrations-head h2 {
  font: 600 32px/1.16 var(--font-heading);
  letter-spacing: -.02em;
  color: var(--heading);
  text-wrap: pretty;
}

.migrations-head p {
  font: 400 14.5px/1.65 var(--font-body);
  color: var(--body-text);
  text-wrap: pretty;
}

.stat-row {
  display: flex;
  gap: 1px;
  background: var(--border);
  flex: none;
}

.stat {
  background: var(--bg);
  padding: 16px 22px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.stat .value {
  font: 600 26px/1 var(--font-heading);
  color: var(--brand);
}

.stat.accent .value { color: var(--accent); }
.stat.danger .value { color: var(--danger); }

.stat .label {
  font: 400 8.5px/1 var(--font-mono);
  letter-spacing: .16em;
  color: var(--muted);
}

.timeline-wrap {
  overflow-x: auto;
  margin-bottom: 44px;
}

.timeline {
  position: relative;
  height: 150px;
  min-width: 900px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.timeline svg { position: absolute; left: 0; top: 0; }

.timeline-caption {
  position: absolute;
  top: 20px;
  font: 400 8px/1 var(--font-mono);
  letter-spacing: .18em;
  color: var(--muted-2);
}

.timeline-node {
  position: absolute;
  top: 48px;
  border: 1px solid var(--border-soft);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-node .dot {
  width: 7px;
  height: 7px;
  background: var(--muted-2);
}

.timeline-node.jalon {
  border-color: var(--milestone-border);
}

.timeline-node.jalon .dot {
  width: 7px;
  height: 7px;
  background: none;
  border: 1.4px solid var(--brand);
  box-sizing: border-box;
}

.timeline-node.current {
  top: 44px;
  width: 36px;
  height: 36px;
  border-color: var(--accent);
  background: var(--accent-soft-bg);
}

.timeline-node.current .dot {
  width: 9px;
  height: 9px;
  background: var(--accent);
}

.timeline-node.target {
  top: 44px;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--brand);
  background: var(--surface);
}

.timeline-node.target .dot {
  width: 11px;
  height: 11px;
  background: none;
  border: 1.6px solid var(--brand);
  box-sizing: border-box;
}

.timeline-label {
  position: absolute;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.timeline-label .v {
  font: 500 9.5px/1 var(--font-mono);
  letter-spacing: .1em;
  color: var(--muted);
}

.timeline-label .d {
  font: 400 8.5px/1.4 var(--font-mono);
  color: var(--muted-2);
}

.timeline-label.current-label { top: 92px; }
.timeline-label.current-label .v { font-size: 10px; color: var(--accent-current-text); }
.timeline-label.current-label .d { color: var(--accent-current-muted); }

.timeline-label.jalon-label .v { color: var(--brand-text); }

.timeline-label.target-label {
  align-items: flex-end;
  top: 92px;
}
.timeline-label.target-label .v { font-size: 10px; color: var(--heading); }

.diff-list {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
}

.diff-head {
  background: var(--bg);
  padding: 11px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.diff-head .from-to {
  font: 400 9px/1 var(--font-mono);
  letter-spacing: .18em;
  color: var(--muted);
}

.diff-head .count {
  font: 400 9px/1 var(--font-mono);
  letter-spacing: .12em;
  color: var(--muted-2);
}

.diff-row {
  background: var(--bg);
  padding: 13px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-left: 2px solid var(--brand);
  flex-wrap: wrap;
}

.diff-row.mod { border-left-color: var(--accent); }
.diff-row.rm { border-left-color: var(--danger); }

.diff-row .sign {
  width: 10px;
  font: 400 12px/1 var(--font-mono);
  color: var(--brand);
}

.diff-row.mod .sign { color: var(--accent); }
.diff-row.rm .sign { color: var(--danger); }

.diff-row .what {
  flex: 1;
  min-width: 160px;
  font: 400 12px/1.4 var(--font-mono);
  color: var(--heading);
}

.diff-row.rm .what {
  color: var(--body-text);
  text-decoration: line-through;
}

.diff-row .tag {
  font: 400 9px/1 var(--font-mono);
  letter-spacing: .1em;
  color: var(--muted);
}

.diff-row .line {
  width: 34px;
  text-align: right;
  font: 400 9px/1 var(--font-mono);
  color: var(--muted-2);
}

/* ---------- INTEGRATION ---------- */

.integration-grid {
  flex: 1;
  min-width: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
}

.integration-card {
  background: var(--surface);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.integration-card .tag {
  font: 400 9px/1 var(--font-mono);
  letter-spacing: .18em;
  color: var(--accent);
}

.integration-card h3 {
  font: 600 16px/1.3 var(--font-heading);
  color: var(--heading);
}

.integration-card p {
  font: 400 12.5px/1.6 var(--font-body);
  color: var(--body-text);
}

.integration-card p code {
  font-family: var(--font-mono);
  font-size: 0.95em;
  color: var(--brand-text);
}

@media (max-width: 640px) {
  .integration-grid { grid-template-columns: 1fr; }
}

/* ---------- CTA ---------- */

.cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  text-align: center;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 26px 26px;
}

.cta h2 {
  font: 600 38px/1.15 var(--font-heading);
  letter-spacing: -.025em;
  color: var(--heading);
  max-width: 640px;
  text-wrap: pretty;
}

.cta p {
  font: 400 15px/1.65 var(--font-body);
  color: var(--body-text);
  max-width: 520px;
  text-wrap: pretty;
}

.cta-ctas {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- FOOTER ---------- */

footer {
  border-top: 1px solid var(--border);
  padding: 46px 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  flex-wrap: wrap;
}

.footer-brand {
  width: 320px;
  max-width: 100%;
  flex: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-brand-row {
  display: flex;
  align-items: center;
  gap: 11px;
}

.footer-brand-row span {
  font: 600 16px/1 var(--font-brand);
  letter-spacing: -.005em;
  color: var(--heading);
}

.footer-brand p {
  font: 400 12.5px/1.65 var(--font-body);
  color: var(--muted);
}

.footer-cols {
  display: flex;
  gap: 76px;
  flex-wrap: wrap;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col .head {
  font: 400 8.5px/1 var(--font-mono);
  letter-spacing: .2em;
  color: var(--muted-2);
}

.footer-col a {
  font: 400 12.5px/1 var(--font-body);
  color: var(--body-text);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom span {
  font: 400 10px/1 var(--font-mono);
  letter-spacing: .12em;
  color: var(--muted-2);
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}