/* =============================================================================
   DESIGN TOKENS — Dark Academic Palette
   Art direction: Academic research lab → authoritative, cerebral, refined
   Palette: Deep navy/slate surfaces, warm parchment text, teal-gold accent
   Typography: Libre Baskerville (display) + Source Sans 3 (body)
   Density: Balanced — generous prose, structured data sections
============================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=Source+Sans+3:wght@300..700&display=swap');

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --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 */
  --radius-sm:   0.25rem;
  --radius-md:   0.375rem;
  --radius-lg:   0.5rem;
  --radius-xl:   0.75rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content Widths */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;

  /* Fonts */
  --font-display: 'Libre Baskerville', 'Georgia', serif;
  --font-body:    'Source Sans 3', 'Helvetica Neue', sans-serif;
}

/* Dark Academic Light Mode */
:root, [data-theme="light"] {
  --color-bg:              #f5f3ee;
  --color-surface:         #f9f8f4;
  --color-surface-2:       #fdfcfa;
  --color-surface-offset:  #eeebe3;
  --color-surface-dynamic: #e8e4da;
  --color-divider:         #d9d4c8;
  --color-border:          #ccc7b8;

  --color-text:            #1a1a2e;
  --color-text-muted:      #5a5870;
  --color-text-faint:      #9896a8;
  --color-text-inverse:    #f5f3ee;

  --color-primary:         #0d4f6b;
  --color-primary-hover:   #0a3d54;
  --color-primary-active:  #072d3e;
  --color-primary-highlight: #c5dce6;

  --color-accent:          #b8860b;
  --color-accent-hover:    #9a6f09;
  --color-accent-light:    #f5e8c0;

  --shadow-sm: 0 1px 3px oklch(0.15 0.02 250 / 0.08);
  --shadow-md: 0 4px 16px oklch(0.15 0.02 250 / 0.10);
  --shadow-lg: 0 12px 40px oklch(0.15 0.02 250 / 0.14);
}

/* Dark Academic Dark Mode */
[data-theme="dark"] {
  --color-bg:              #0f1117;
  --color-surface:         #14161f;
  --color-surface-2:       #191c28;
  --color-surface-offset:  #1d2030;
  --color-surface-dynamic: #252840;
  --color-divider:         #272a3a;
  --color-border:          #313452;

  --color-text:            #e8e4d8;
  --color-text-muted:      #9a96aa;
  --color-text-faint:      #55536a;
  --color-text-inverse:    #0f1117;

  --color-primary:         #4fa8c8;
  --color-primary-hover:   #6bbedd;
  --color-primary-active:  #88cfe0;
  --color-primary-highlight: #1a2c38;

  --color-accent:          #d4a843;
  --color-accent-hover:    #e0be6a;
  --color-accent-light:    #2a2210;

  --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.25);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 12px 40px oklch(0 0 0 / 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #0f1117;
    --color-surface:         #14161f;
    --color-surface-2:       #191c28;
    --color-surface-offset:  #1d2030;
    --color-surface-dynamic: #252840;
    --color-divider:         #272a3a;
    --color-border:          #313452;
    --color-text:            #e8e4d8;
    --color-text-muted:      #9a96aa;
    --color-text-faint:      #55536a;
    --color-text-inverse:    #0f1117;
    --color-primary:         #4fa8c8;
    --color-primary-hover:   #6bbedd;
    --color-primary-active:  #88cfe0;
    --color-primary-highlight: #1a2c38;
    --color-accent:          #d4a843;
    --color-accent-hover:    #e0be6a;
    --color-accent-light:    #2a2210;
    --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.25);
    --shadow-md: 0 4px 16px oklch(0 0 0 / 0.35);
    --shadow-lg: 0 12px 40px oklch(0 0 0 / 0.45);
  }
}

/* =============================================================================
   BASE RESET
============================================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  display: flex;
  flex-direction: column;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.2; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: color-mix(in oklab, var(--color-primary) 20%, transparent);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role="button"], input, textarea, select {
  transition: color var(--transition),
              background var(--transition),
              border-color var(--transition),
              box-shadow var(--transition),
              opacity var(--transition);
}

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

/* =============================================================================
   LAYOUT
============================================================================= */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--wide {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--narrow {
  max-width: var(--content-narrow);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

main { flex: 1; }

/* =============================================================================
   NAVIGATION
============================================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition);
}
.site-header--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.site-logo:hover { color: var(--color-primary); }
.site-logo svg { flex-shrink: 0; }

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.logo-sub {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 400;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  letter-spacing: 0.01em;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-surface-offset);
}
.nav-links a[aria-current="page"] {
  color: var(--color-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
}
.nav-toggle:hover { background: var(--color-surface-offset); color: var(--color-text); }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-4) var(--space-6);
    gap: var(--space-1);
  }
  .nav-links.is-open a { width: 100%; }
}

/* =============================================================================
   HERO — HOME PAGE
============================================================================= */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  background: linear-gradient(135deg,
    var(--color-bg) 0%,
    var(--color-surface-offset) 50%,
    var(--color-surface-dynamic) 100%);
  border-bottom: 1px solid var(--color-divider);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 70% 50%,
    color-mix(in oklab, var(--color-primary) 8%, transparent),
    transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero-lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-8);
  max-width: 56ch;
}

.hero-ctas {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.hero-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.hero-stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-sm);
}
.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-1);
}
.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; gap: var(--space-10); }
  .hero-visual { order: -1; }
  .hero-stat-grid { grid-template-columns: 1fr 1fr; }
}

/* =============================================================================
   BUTTONS
============================================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  transition: background var(--transition), color var(--transition),
              box-shadow var(--transition), transform var(--transition);
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-surface-offset);
  border-color: var(--color-text-muted);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding-inline: var(--space-2);
}
.btn-ghost:hover { color: var(--color-primary-hover); }

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

/* =============================================================================
   SECTION SCAFFOLDING
============================================================================= */
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.section-header {
  margin-bottom: var(--space-12);
}

.section-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.65;
}

.section--alt {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

/* =============================================================================
   RESEARCH CARDS
============================================================================= */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: var(--space-6);
}

.research-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.research-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.research-card-icon {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
}

.research-card-tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.research-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0;
}

.research-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
}

.research-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

/* =============================================================================
   PEOPLE / TEAM
============================================================================= */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-8);
}

.person-card {
  text-align: center;
  text-decoration: none;
  color: inherit;
}

.person-photo {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  margin-inline: auto;
  margin-bottom: var(--space-4);
  object-fit: cover;
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  background: var(--color-surface-offset);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.person-card:hover .person-photo {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.person-name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.person-role {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.person-affil {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Person detail page */
.person-detail {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-12);
  align-items: start;
}

.person-detail-photo {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  object-fit: cover;
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-md);
  background: var(--color-surface-offset);
}

.person-links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.person-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-primary-highlight);
  border-radius: var(--radius-full);
}
.person-link:hover {
  background: var(--color-primary-highlight);
}

@media (max-width: 640px) {
  .person-detail { grid-template-columns: 1fr; }
  .person-detail-photo { max-width: 200px; margin-inline: auto; }
}

/* =============================================================================
   PUBLICATIONS
============================================================================= */
.pub-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.pub-item {
  display: grid;
  grid-template-columns: 3fr auto;
  gap: var(--space-4);
  align-items: start;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.07);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition);
}
.pub-item:hover { box-shadow: var(--shadow-sm); }

.pub-year {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.pub-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.pub-authors {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.pub-authors strong { color: var(--color-text); }

.pub-venue {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

.pub-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: flex-end;
}

.pub-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 1px solid currentColor;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.pub-badge--pdf { color: var(--color-primary); }
.pub-badge--doi { color: var(--color-accent); }
.pub-badge--arxiv { color: var(--color-text-muted); }

.pub-badge:hover { background: var(--color-surface-offset); }

@media (max-width: 640px) {
  .pub-item { grid-template-columns: 1fr; }
  .pub-links { flex-direction: row; align-items: flex-start; }
}

/* Publication filter bar */
.pub-filters {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.pub-filter-btn {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.04em;
}
.pub-filter-btn:hover,
.pub-filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* =============================================================================
   NEWS / UPDATES STRIP (homepage)
============================================================================= */
.news-strip {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.07);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.news-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: var(--space-6);
  padding: var(--space-5) var(--space-6);
  align-items: start;
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
}
.news-item:last-child { border-bottom: none; }

.news-date {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-muted);
  padding-top: var(--space-1);
  letter-spacing: 0.04em;
}

.news-text { color: var(--color-text); line-height: 1.5; }
.news-text a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }

/* =============================================================================
   PAGE HEADER (inner pages)
============================================================================= */
.page-header {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
}

.page-header-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.page-header-lead {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.65;
}

/* =============================================================================
   PROSE (markdown content)
============================================================================= */
.prose {
  max-width: 68ch;
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text);
}
.prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display);
  color: var(--color-text);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}
.prose h2 { font-size: var(--text-xl); }
.prose h3 { font-size: var(--text-lg); }
.prose h4 { font-size: var(--text-base); font-weight: 700; }
.prose p { margin-bottom: var(--space-5); }
.prose ul, .prose ol { padding-left: var(--space-6); margin-bottom: var(--space-5); }
.prose li { margin-bottom: var(--space-2); color: var(--color-text-muted); }
.prose a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--color-primary-hover); }
.prose strong { color: var(--color-text); font-weight: 700; }
.prose em { font-style: italic; }
.prose blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-6);
  color: var(--color-text-muted);
  font-style: italic;
  margin-block: var(--space-6);
}
.prose code {
  font-size: 0.875em;
  background: var(--color-surface-offset);
  padding: 0.1em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}
.prose pre {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  overflow-x: auto;
  margin-block: var(--space-6);
}
.prose pre code { background: none; border: none; padding: 0; font-size: var(--text-sm); }
.prose hr {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin-block: var(--space-10);
}
.prose img {
  border-radius: var(--radius-lg);
  margin-block: var(--space-6);
  width: 100%;
}

/* =============================================================================
   CONTACT PAGE
============================================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info { display: flex; flex-direction: column; gap: var(--space-6); }

.contact-block {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
.contact-block-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  flex-shrink: 0;
}
.contact-block-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.contact-block-text { color: var(--color-text); font-size: var(--text-sm); line-height: 1.6; }
.contact-block-text a { color: var(--color-primary); text-decoration: none; }
.contact-block-text a:hover { text-decoration: underline; }

/* Contact form */
.contact-form { display: flex; flex-direction: column; gap: var(--space-5); }
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }
.form-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 15%, transparent);
}
.form-textarea { min-height: 140px; resize: vertical; line-height: 1.6; }
.form-input::placeholder,
.form-textarea::placeholder { color: var(--color-text-faint); }

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* =============================================================================
   FOOTER
============================================================================= */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-10);
}

.footer-brand .logo-text { font-size: var(--text-base); margin-bottom: var(--space-3); display: block; }
.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 38ch;
}

.footer-col-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer-links a:hover { color: var(--color-primary); }

.footer-bottom {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: var(--space-2); text-align: center; }
}

@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* =============================================================================
   UTILITIES
============================================================================= */
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }
.divider {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin-block: var(--space-8);
}
.badge {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.badge--primary {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-color: color-mix(in oklab, var(--color-primary) 30%, transparent);
}
.badge--accent {
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-color: color-mix(in oklab, var(--color-accent) 30%, transparent);
}

/* Skip to content */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
}
.skip-link:focus { top: var(--space-4); }

/* Scroll reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}