:root {
  
  --color-paper: oklch(0.985 0.005 75);
  --color-paper-2: oklch(0.965 0.008 75);
  --color-paper-3: oklch(0.93 0.012 75);
  --color-rule: oklch(0.88 0.008 75);
  --color-ink: oklch(0.18 0.01 70);
  --color-ink-2: oklch(0.32 0.01 70);
  --color-ink-3: oklch(0.48 0.01 70);
  --color-ink-4: oklch(0.62 0.01 70);

  --color-sandstone-50: oklch(0.96 0.012 35);
  --color-sandstone-100: oklch(0.92 0.035 35);
  --color-sandstone-200: oklch(0.84 0.06 35);
  --color-sandstone-400: oklch(0.62 0.11 35);
  --color-sandstone-500: oklch(0.52 0.13 35);
  --color-sandstone-600: oklch(0.44 0.12 35);
  --color-sandstone-700: oklch(0.36 0.10 35);

  
  --color-bg: var(--color-paper);
  --color-bg-elev: var(--color-paper-2);
  --color-fg: var(--color-ink);
  --color-muted: var(--color-ink-3);
  --color-accent: var(--color-sandstone-500);
  --color-accent-soft: var(--color-sandstone-100);

  
  --font-display: "Source Serif 4", "Source Serif Pro", Georgia, serif;
  --font-sans: "Inter Tight", "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  
  --radius-none: 0;
  --radius-xs: 2px;
  --radius-sm: 3px;
  --radius-md: 4px;

  
  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-28: 28px;
  --space-32: 32px;
  --space-40: 40px;
  --space-48: 48px;

  
  --shadow-paper: 0 1px 0 oklch(0.88 0.008 75);
  --shadow-card: 0 1px 2px oklch(0.18 0.01 70 / 0.04), 0 0 0 1px oklch(0.88 0.008 75);
}


html, body {
  background: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--color-sandstone-500); color: var(--color-paper); }


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

.t-eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-sandstone-500);
}
.t-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--color-ink-3);
}


.today-strip { background: var(--color-ink); color: var(--color-paper); }
.today-strip .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--color-sandstone-200);
}




.masthead-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.025em;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1;
}
.masthead-title em {
  font-style: italic;
  color: var(--color-sandstone-500);
  font-weight: 800;
}


.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  position: relative;
  padding: var(--space-12) 0;
  white-space: nowrap;
}
.nav-link:hover { color: var(--color-sandstone-600); }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--color-sandstone-500);
}


.sub-link {
  font-size: 14px;
  color: var(--color-ink-3);
  padding: var(--space-8) var(--space-16);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  
  flex: 0 0 auto;
  
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.sub-link:hover { color: var(--color-ink); }
.sub-link.active {
  color: var(--color-ink);
  border-bottom-color: var(--color-sandstone-500);
  font-weight: 600;
}


.view-toggle {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  flex: 0 0 auto;
  color: var(--color-ink-3);
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}
.view-toggle:hover { color: var(--color-ink); }
.view-toggle.active {
  color: var(--color-ink);
  border-bottom-color: var(--color-ink);
}


.article-card h3, .article-card h4 { transition: color .15s ease; }
.article-card:hover h3, .article-card:hover h4 { color: var(--color-sandstone-600); }


.number-marker {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 14px;
  color: var(--color-sandstone-500);
  font-style: italic;
  font-feature-settings: "lnum";
}


.hero-img-wrap { background: var(--color-paper-3); }

.t-display {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(48px, 6.4vw, 96px);
  line-height: 0.98;
  letter-spacing: -0.02em;
}
.t-h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 4.2vw, 60px);
  line-height: 1.04;
  letter-spacing: -0.015em;
}
.t-h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 2.8vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.t-h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.005em;
}
.t-h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.3;
  letter-spacing: -0.005em;
}
.t-lede {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(20px, 1.6vw, 24px);
  line-height: 1.45;
  color: var(--color-ink-2);
}
.t-body { font-size: 17px; line-height: 1.6; }
.t-body-sm { font-size: 15px; line-height: 1.55; }
.t-caption { font-size: 13px; line-height: 1.45; color: var(--color-ink-3); }


.rule { border-color: var(--color-rule); }
.rule-strong { border-color: var(--color-ink); }


.dropcap::first-letter {
  font-family: var(--font-display);
  float: left;
  font-size: 5.2em;
  line-height: 0.85;
  padding: var(--space-8) var(--space-8) 0 0;
  font-weight: 400;
  color: var(--color-sandstone-500);
}


*:focus-visible {
  outline: 2px solid var(--color-sandstone-500);
  outline-offset: 2px;
}


.ad-slot {
  border: 1px solid var(--color-rule);
  background: var(--color-paper-2);
  color: var(--color-ink-3);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}


.t-h1-hero {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 5.4vw, 80px);
  line-height: 1.02;
  letter-spacing: -0.02em;
}
.t-lede-hero {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(20px, 1.8vw, 26px);
  line-height: 1.45;
  color: var(--color-ink-2);
}
.t-h2-related {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.01em;
}


@media (prefers-color-scheme: dark) {
  :root {
    --color-paper: oklch(0.16 0.008 70);
    --color-paper-2: oklch(0.20 0.010 70);
    --color-paper-3: oklch(0.24 0.012 70);
    --color-rule: oklch(0.30 0.010 70);
    --color-ink: oklch(0.94 0.005 70);
    --color-ink-2: oklch(0.84 0.006 70);
    --color-ink-3: oklch(0.70 0.008 70);
    --color-ink-4: oklch(0.56 0.010 70);

    --color-sandstone-50: oklch(0.22 0.020 35);
    --color-sandstone-100: oklch(0.28 0.045 35);
    --color-sandstone-200: oklch(0.64 0.075 35);
    --color-sandstone-400: oklch(0.74 0.11 35);
    --color-sandstone-500: oklch(0.72 0.13 35);
    --color-sandstone-600: oklch(0.80 0.12 35);
    --color-sandstone-700: oklch(0.86 0.10 35);

    --shadow-paper: 0 1px 0 oklch(0.30 0.010 70);
    --shadow-card: 0 1px 2px oklch(0 0 0 / 0.3), 0 0 0 1px oklch(0.30 0.010 70);
  }

  
  .today-strip {
    background: oklch(0.10 0.008 70);
    color: oklch(0.94 0.005 70);
  }
  .today-strip .num {
    color: oklch(0.78 0.05 35);
  }
}