/* ===== AX Roadmap — Design Tokens ===== */
:root,
[data-theme='light'] {
  /* Surfaces — cool slate, editorial paper feel */
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-surface-2: #fbfbfc;
  --color-surface-offset: #edeef2;
  --color-surface-offset-2: #e3e5eb;
  --color-surface-dynamic: #dcdee6;
  --color-divider: #e0e2e8;
  --color-border: #d3d6e0;

  /* Text */
  --color-text: #171a2b;
  --color-text-muted: #5c6178;
  --color-text-faint: #9599ac;
  --color-text-inverse: #f7f8fb;

  /* Primary accent — deep indigo (strategic / authoritative) */
  --color-primary: #2d3ee0;
  --color-primary-hover: #232fb3;
  --color-primary-active: #1c268c;
  --color-primary-highlight: #dde0fb;

  /* Secondary accent — amber (signal / momentum, used sparingly) */
  --color-accent: #d97b1f;
  --color-accent-hover: #b8650f;
  --color-accent-highlight: #f6e3cd;

  /* Warning */
  --color-warning: #a15b12;
  --color-warning-hover: #7d470e;
  --color-warning-highlight: #efdcc4;

  /* Error */
  --color-error: #b13350;
  --color-error-hover: #8c2740;
  --color-error-highlight: #f0d5dd;

  /* Success */
  --color-success: #227a55;
  --color-success-hover: #185f42;
  --color-success-highlight: #cfe6da;

  /* Data-viz extras */
  --color-blue: #2563a8;
  --color-purple: #6b46b3;
  --color-teal: #0f8a83;
  --color-gold: #b8901f;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px oklch(0.15 0.03 265 / 0.06);
  --shadow-md: 0 4px 14px oklch(0.15 0.03 265 / 0.08);
  --shadow-lg: 0 16px 40px oklch(0.15 0.03 265 / 0.14);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1240px;
  --content-full: 100%;

  --font-display: 'Cabinet Grotesk', 'General Sans', sans-serif;
  --font-body: 'General Sans', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Geist Mono', monospace;
}

[data-theme='dark'] {
  --color-bg: #0d0f1a;
  --color-surface: #12142200;
  --color-surface: #131526;
  --color-surface-2: #171a2d;
  --color-surface-offset: #1a1d32;
  --color-surface-offset-2: #212540;
  --color-surface-dynamic: #282c4a;
  --color-divider: #23263d;
  --color-border: #2c3050;

  --color-text: #e7e8f2;
  --color-text-muted: #9a9fbd;
  --color-text-faint: #63678a;
  --color-text-inverse: #12142a;

  --color-primary: #7c8cff;
  --color-primary-hover: #9aa6ff;
  --color-primary-active: #b3bcff;
  --color-primary-highlight: #262c5c;

  --color-accent: #f0a24e;
  --color-accent-hover: #f4b872;
  --color-accent-highlight: #3d2c16;

  --color-warning: #e0a24f;
  --color-warning-hover: #ecb974;
  --color-warning-highlight: #3d2c16;

  --color-error: #e187a1;
  --color-error-hover: #e9a3b8;
  --color-error-highlight: #3a2130;

  --color-success: #5ec996;
  --color-success-hover: #7fdaad;
  --color-success-highlight: #163829;

  --color-blue: #6ba6e8;
  --color-purple: #a889e0;
  --color-teal: #4fc3ba;
  --color-gold: #e0bb5c;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.5);
}

/* ===== Type Scale ===== */
:root {
  --text-xs: clamp(0.75rem, 0.71rem + 0.2vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.83rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.04rem + 0.5vw, 1.375rem);
  --text-xl: clamp(1.375rem, 1.2rem + 1vw, 1.875rem);
  --text-2xl: clamp(1.75rem, 1.35rem + 2vw, 2.75rem);
  --text-3xl: clamp(2.25rem, 1.4rem + 3.5vw, 3.75rem);
  --text-hero: clamp(2.75rem, 1.2rem + 5.5vw, 5.5rem);
}

/* ===== Spacing ===== */
:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

body {
  font-variant-numeric: tabular-nums lining-nums;
}

/* ===== Layout Primitives ===== */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--default {
  max-width: var(--content-default);
}
.container--narrow {
  max-width: var(--content-narrow);
}

.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.section--tight {
  padding-block: clamp(var(--space-10), 5vw, var(--space-16));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
}

/* ===== Header / Nav ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.header--hidden {
  transform: translateY(-100%);
}
.header--scrolled {
  box-shadow: var(--shadow-sm);
}
.header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
}
.header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
}
.header__brand-mark {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  flex-shrink: 0;
}
.header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.header__brand-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
}
.header__brand-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav__list {
  display: flex;
  gap: var(--space-5);
}
.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding-block: var(--space-1);
  border-bottom: 2px solid transparent;
}
.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text);
  border-bottom-color: var(--color-primary);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.icon-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}
.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--ghost:hover {
  background: var(--color-surface-offset);
  border-color: var(--color-text-faint);
}
.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(var(--space-20), 10vw, var(--space-32)) clamp(var(--space-16), 8vw, var(--space-24));
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 55% at 85% 0%, oklch(from var(--color-primary) l c h / 0.16), transparent 70%),
    radial-gradient(45% 45% at 8% 15%, oklch(from var(--color-accent) l c h / 0.12), transparent 70%);
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-16);
  align-items: center;
}
.hero__kicker {
  margin-bottom: var(--space-5);
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.04;
  margin-bottom: var(--space-6);
}
.hero__title em {
  font-style: normal;
  color: var(--color-primary);
}
.hero__lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: var(--space-8);
}
.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}
.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.hero__stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}
.hero__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* Hero visual — orbit diagram */
.hero__visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.orbit-card {
  position: relative;
  width: 100%;
  height: 100%;
}
.orbit-ring {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  border: 1px dashed oklch(from var(--color-text) l c h / 0.15);
}
.orbit-ring--2 {
  inset: 14%;
}
.orbit-ring--3 {
  inset: 28%;
}
.orbit-center {
  position: absolute;
  inset: 38%;
  border-radius: var(--radius-full);
  background: linear-gradient(145deg, var(--color-primary), oklch(from var(--color-primary) calc(l - 0.12) c h));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.6875rem, 2.4vw, var(--text-sm));
  line-height: 1.25;
  text-align: center;
  padding: var(--space-2);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.orbit-node {
  position: absolute;
  width: 74px;
  height: 74px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: var(--text-xs);
  text-align: center;
  color: var(--color-text);
}
.orbit-node svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
}
.orbit-node--1 {
  top: -4%;
  left: 50%;
  translate: -50% 0;
}
.orbit-node--2 {
  top: 25%;
  right: -6%;
}
.orbit-node--3 {
  bottom: 4%;
  right: 12%;
}
.orbit-node--4 {
  bottom: 4%;
  left: 12%;
}
.orbit-node--5 {
  top: 25%;
  left: -6%;
}

/* ===== Section headers ===== */
.section-head {
  max-width: 720px;
  margin-bottom: var(--space-12);
}
.section-head__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-block: var(--space-4) var(--space-3);
}
.section-head__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}
.section-head--center {
  margin-inline: auto;
  text-align: center;
}

/* ===== Tabs (used for level navigator) ===== */
.tabbar {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}
.tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}
.tab__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 700;
}
.tab.is-active {
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}
.tab.is-active .tab__num {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.tab:hover:not(.is-active) {
  border-color: var(--color-text-faint);
  color: var(--color-text);
}

.level-panel {
  display: none;
}
.level-panel.is-active {
  display: block;
  animation: fadeUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.level-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}
.level-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}
.level-card__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.level-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.level-card ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.level-card li {
  display: flex;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.level-card li svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-primary);
}

.level-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.meta-block {
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.meta-block__label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.meta-block__value {
  font-size: var(--text-base);
  font-weight: 600;
}
.meta-block__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.progress-track {
  display: flex;
  gap: var(--space-1);
  margin-top: var(--space-3);
}
.progress-seg {
  flex: 1;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-surface-dynamic);
}
.progress-seg.is-filled {
  background: var(--color-primary);
}

/* ===== Case study timeline ===== */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--color-divider);
}
.timeline-step {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-6);
  padding-block: var(--space-6);
}
.timeline-step__marker {
  position: relative;
  z-index: 1;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
  font-size: var(--text-base);
}
.timeline-step__body {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}
.timeline-step__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}
.timeline-step__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.timeline-step__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.timeline-step__tools {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.chip {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.chip--accent {
  background: var(--color-accent-highlight);
  color: var(--color-accent-hover);
  border-color: transparent;
}

/* ===== Comparison table ===== */
.table-wrap {
  position: relative;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
}
.table-scroll-hint {
  display: none;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
}
.table-scroll-hint svg {
  width: 14px;
  height: 14px;
}
@media (max-width: 640px) {
  .table-scroll-hint {
    display: inline-flex;
  }
  .table-wrap::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 32px;
    pointer-events: none;
    background: linear-gradient(to left, oklch(from var(--color-surface) l c h / 0.95), transparent);
    border-top-right-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
  }
}
.compare-table {
  min-width: 780px;
  font-size: var(--text-sm);
}
.compare-table th,
.compare-table td {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  border-bottom: 1px solid var(--color-divider);
  vertical-align: top;
}
.compare-table thead th {
  background: var(--color-surface-offset);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: 700;
  position: sticky;
  top: 0;
}
.compare-table tbody tr:last-child td {
  border-bottom: none;
}
.compare-table tbody tr:hover {
  background: var(--color-surface-offset);
}
.compare-table td strong {
  display: block;
  font-size: var(--text-sm);
  margin-bottom: 2px;
}
.compare-table td span.sub {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 3px var(--space-3);
  border-radius: var(--radius-full);
}
.badge--good {
  background: var(--color-success-highlight);
  color: var(--color-success-hover);
}
.badge--mid {
  background: var(--color-warning-highlight);
  color: var(--color-warning-hover);
}
.badge--tag {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}

/* ===== Governance checklist ===== */
.gov-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
.gov-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}
.gov-card__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.gov-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.gov-card__icon svg {
  width: 20px;
  height: 20px;
}
.gov-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
}
.gov-card__risk {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.check-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.check-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-2);
  margin-inline: calc(var(--space-2) * -1);
  border-radius: var(--radius-md);
}
.check-item:hover {
  background: var(--color-surface-offset);
}
.check-item input {
  appearance: none;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border-radius: 5px;
  border: 1.5px solid var(--color-border);
  margin-top: 2px;
  position: relative;
  background: var(--color-surface);
}
.check-item input:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.check-item input:checked::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.check-item span.done {
  text-decoration: line-through;
  color: var(--color-text-faint);
}

.gov-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-8);
}
.gov-summary__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.gov-summary__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
}

/* ===== Stack comparison cards (tools) ===== */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.stack-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.stack-card__label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
}
.stack-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
}
.stack-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.stack-card__meter {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.meter-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.meter-row span:first-child {
  width: 72px;
  flex-shrink: 0;
}
.meter-bar {
  flex: 1;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  overflow: hidden;
}
.meter-bar__fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}

/* ===== CTA / footer ===== */
.cta {
  background: linear-gradient(135deg, var(--color-primary), oklch(from var(--color-primary) calc(l - 0.1) c h));
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-10), 6vw, var(--space-16));
  color: var(--color-text-inverse);
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: var(--space-8);
  align-items: center;
}
.cta__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.cta__desc {
  font-size: var(--text-sm);
  opacity: 0.85;
  max-width: 48ch;
}
.cta__actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  flex-wrap: wrap;
}
.cta .btn--primary {
  background: white;
  color: var(--color-primary-active);
}
.cta .btn--primary:hover {
  background: oklch(0.95 0 0);
}
.cta .btn--ghost {
  border-color: oklch(1 0 0 / 0.4);
  color: white;
}
.cta .btn--ghost:hover {
  background: oklch(1 0 0 / 0.12);
}

.footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-10);
}
.footer__grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer__note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 60ch;
}

/* ===== Sources ===== */
.source-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.source-list a {
  color: var(--color-text-muted);
}
.source-list a:hover {
  color: var(--color-primary);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }
  .hero__visual {
    max-width: 420px;
    margin-inline: auto;
  }
  .level-grid {
    grid-template-columns: 1fr;
  }
  .gov-grid {
    grid-template-columns: 1fr;
  }
  .stack-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .cta {
    grid-template-columns: 1fr;
  }
  .cta__actions {
    justify-content: flex-start;
  }
  .stack-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero__stats {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  .timeline::before {
    left: 23px;
  }
  .timeline-step {
    grid-template-columns: 48px 1fr;
    gap: var(--space-4);
  }
  .timeline-step__marker {
    width: 48px;
    height: 48px;
    font-size: var(--text-sm);
  }
}

/* Mobile nav drawer */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: oklch(from var(--color-bg) l c h / 0.98);
  backdrop-filter: blur(10px);
  padding: var(--space-6);
}
.mobile-nav.is-open {
  display: flex;
  flex-direction: column;
}
.mobile-nav__top {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-8);
}
.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.mobile-nav__list a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}