:root {
  --font-sans: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Lora, Georgia, Cambria, "Times New Roman", serif;
  --font-he: "Frank Ruhl Libre", "Times New Roman", serif;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --measure: 65ch;
  --focus: 2px solid var(--color-border-focus);
}

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

html { color-scheme: light dark; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-surface-sunken);
}

.skip {
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  transform: translateY(-200%);
  padding: var(--space-2) var(--space-3);
  background: var(--color-action-primary);
  color: var(--color-text-on-action);
  text-decoration: none;
  z-index: 10;
}
.skip:focus { transform: none; outline: var(--focus); outline-offset: 2px; }

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

.mast {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-4);
  max-width: 1120px;
  margin: 0 auto;
}

.mark {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.status {
  margin: 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: var(--space-16) var(--space-4) var(--space-20);
}

.hero h1 {
  margin: 0 0 var(--space-6);
  max-width: 22ch;
  font-family: var(--font-serif);
  font-size: clamp(48px, 8vw, 72px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.lede {
  margin: 0 0 var(--space-10);
  max-width: var(--measure);
  font-size: 18px;
  color: var(--color-text-secondary);
}

.witness {
  margin: 0 0 var(--space-3);
  font-family: var(--font-he);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  line-height: 1.3;
}

.witness-cap {
  margin: 0;
  max-width: 40ch;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-4) var(--space-20);
}

.split h2 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.2;
}

.split p {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  color: var(--color-text-secondary);
}

.tiers {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-border-strong);
}

.tiers li {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border-default);
}

.tiers h3 {
  margin: 0 0 var(--space-2);
  font-size: 16px;
  font-weight: 600;
}

.tiers p {
  margin: 0;
  font-size: 14px;
}

.band {
  background: var(--color-text-primary);
  color: var(--color-text-on-dark);
  padding: var(--space-16) var(--space-4);
}

.band h2 {
  margin: 0 0 var(--space-4);
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 600;
}

.band p {
  max-width: 65ch;
  margin: 0 auto 0 0;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  color: var(--color-text-on-dark);
}

footer {
  padding: var(--space-8) var(--space-4);
  max-width: 1120px;
  margin: 0 auto;
  font-size: 14px;
  color: var(--color-text-secondary);
}

footer a {
  color: var(--color-text-link);
}

a:focus-visible,
button:focus-visible {
  outline: var(--focus);
  outline-offset: 2px;
}

@media (min-width: 800px) {
  .mast,
  .hero,
  .split,
  footer { padding-left: var(--space-8); padding-right: var(--space-8); }
  .band { padding-left: var(--space-8); padding-right: var(--space-8); }
  .split {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-16);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-text-primary: #f9fafb;
    --color-text-secondary: #d1d5db;
    --color-text-on-dark: #f9fafb;
    --color-surface-sunken: #111827;
    --color-surface-page: #030712;
    --color-border-default: #374151;
    --color-border-strong: #9ca3af;
    --color-border-focus: #60a5fa;
    --color-action-primary: #60a5fa;
    --color-text-on-action: #111827;
    --color-button-primary-bg: #2563eb;
    --color-button-primary-bg-hover: #1d4ed8;
    --color-button-primary-bg-active: #1e40af;
    --color-button-primary-text: #ffffff;
    --color-button-secondary-bg: #1f2937;
    --color-button-secondary-bg-hover: #374151;
    --color-button-secondary-text: #f9fafb;
    --color-button-ghost-bg-hover: rgba(255, 255, 255, 0.08);
    --color-button-ghost-text: #f9fafb;
    --color-button-destructive-bg: #dc2626;
    --color-button-destructive-bg-hover: #b91c1c;
    --color-button-destructive-text: #ffffff;
    --color-button-disabled-bg: #1f2937;
    --color-button-disabled-text: #4b5563;
    --color-input-bg: #111827;
    --color-input-border: #374151;
    --color-input-border-hover: #9ca3af;
    --color-input-text: #f9fafb;
    --color-input-placeholder: #6b7280;
    --color-card-bg: #111827;
    --color-card-border: #1f2937;
    --color-badge-neutral-bg: #1f2937;
    --color-badge-neutral-text: #e5e7eb;
    --color-text-link: #60a5fa;
    --color-interactive-selected-bg: #1e3a8a;
    --color-interactive-selected-border: #3b82f6;
  }
  .band {
    background: #030712;
    border-top: 1px solid var(--color-border-default);
    border-bottom: 1px solid var(--color-border-default);
  }
}