/* ============ DESIGN TOKENS ============ */
:root, [data-theme="light"] {
  --color-bg: #F5F1E8;
  --color-surface: #FBF9F3;
  --color-surface-2: #EFE9DA;
  --color-border: #DCD3BE;
  --color-divider: #DCD3BE;

  --color-text: #221C15;
  --color-text-muted: #6B6255;
  --color-text-faint: #A79E8C;

  --color-primary: #0B2A4A;      /* deep navy */
  --color-primary-hover: #123a63;
  --color-accent: #8C1D18;       /* muted crimson */
  --color-accent-2: #B08D3E;     /* muted gold rule */

  --shadow-sm: 0 1px 2px rgba(34, 28, 21, 0.06);
  --shadow-md: 0 8px 24px rgba(34, 28, 21, 0.10);
}

[data-theme="dark"] {
  --color-bg: #14120F;
  --color-surface: #1A1712;
  --color-surface-2: #211D17;
  --color-border: #322C22;
  --color-divider: #322C22;

  --color-text: #EDE7D9;
  --color-text-muted: #A79E8C;
  --color-text-faint: #6B6255;

  --color-primary: #9FC0E0;
  --color-primary-hover: #C3D9EE;
  --color-accent: #D98A83;
  --color-accent-2: #D9BD79;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
}

:root {
  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: 'Source Serif 4', 'Georgia', serif;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);
  --text-lg: clamp(1.25rem, 1.1rem + 0.75vw, 1.625rem);
  --text-xl: clamp(1.6rem, 1.3rem + 1.25vw, 2.35rem);
  --text-2xl: clamp(2.25rem, 1.3rem + 3vw, 4.25rem);

  --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;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --measure: 68ch;
}

/* ============ RESET / BASE ============ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

img { max-width: 100%; display: block; }

h1, h2 { font-family: var(--font-display); color: var(--color-text); margin: 0; }

a { color: inherit; }

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) clamp(var(--space-5), 5vw, var(--space-12));
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-divider);
}

.mark {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.03em;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-primary);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}
.theme-toggle:hover { background: var(--color-surface-2); }
.theme-toggle:active { transform: scale(0.94); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ============ HERO ============ */
.hero {
  max-width: 840px;
  margin: 0 auto;
  padding: clamp(var(--space-16), 10vw, var(--space-24)) var(--space-5) var(--space-10);
  text-align: center;
}

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-4);
}

.hero-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin: var(--space-4) 0 0;
}

.hero-rule {
  width: 64px;
  height: 3px;
  background: var(--color-accent-2);
  margin: var(--space-8) auto;
  border-radius: 2px;
}

.byline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-align: left;
}

.byline-photo {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--color-border);
}

.byline-name {
  margin: 0;
  font-weight: 600;
  font-size: var(--text-sm);
}

.byline-meta {
  margin: 2px 0 0;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============ ARTICLE ============ */
.article {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--space-5) var(--space-16);
}

.article p {
  margin: 0 0 var(--space-6);
  color: var(--color-text);
}

.article .lead {
  font-size: var(--text-lg);
  color: var(--color-text);
  font-weight: 400;
}

.article h2 {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: var(--space-16) 0 var(--space-5);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-divider);
}

.article h2:first-of-type { margin-top: var(--space-12); }

/* Pull quotes */
.pull-quote {
  margin: var(--space-10) 0;
  padding: var(--space-2) 0 var(--space-2) var(--space-8);
  border-left: 3px solid var(--color-accent);
}
.pull-quote p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  line-height: 1.5;
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}
.pull-quote cite {
  font-family: var(--font-body);
  font-style: normal;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.closing-quote {
  margin: var(--space-16) calc(-1 * var(--space-5)) var(--space-10);
  padding: var(--space-10) var(--space-8);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  text-align: center;
}
.closing-quote p {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  line-height: 1.55;
  color: var(--color-primary);
  margin: 0;
  max-width: 56ch;
  margin-inline: auto;
}

/* Stat bar */
.stat-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: var(--space-10) 0;
}

.stat {
  background: var(--color-surface);
  padding: var(--space-5) var(--space-3);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat-value {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.9rem);
  font-weight: 600;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums lining-nums;
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.35;
}

/* Author card */
.author-card {
  max-width: var(--measure);
  margin: 0 auto var(--space-24);
  padding: var(--space-8) var(--space-5);
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.author-photo {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  flex: none;
  border: 1px solid var(--color-border);
}

.author-name {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
}

.author-bio {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: var(--space-10) var(--space-5) var(--space-16);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}
.site-footer p { margin: 0 0 var(--space-2); }
.footer-fine { color: var(--color-text-faint); }

/* ============ REVEAL ANIMATION ============ */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 640px) {
  .stat-bar { grid-template-columns: repeat(2, 1fr); }
  .closing-quote { margin-left: 0; margin-right: 0; padding: var(--space-8) var(--space-5); }
  .author-card { flex-direction: column; align-items: center; text-align: center; }
  .byline { text-align: center; flex-direction: column; }
}