/* ============================================
   RETROFUTURIST ACADEMIC — Design System
   Palette: Deep space black + phosphor green + amber
   Era: 1950s-1980s sci-fi / retro computing
   ============================================ */

/* Google Fonts preconnect */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300..700&family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');
@import url('https://api.fontshare.com/v2/css?f[]=cabinet-grotesk@400,500,700,800&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);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 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;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Space Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Space Grotesk', 'Helvetica Neue', sans-serif;
  --font-mono: 'Space Mono', 'Courier New', monospace;

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

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

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

/* ============================================
   LIGHT MODE — Retrofuturist Day
   Warm paper + amber + phosphor green accents
   ============================================ */
:root, [data-theme="light"] {
  --color-bg:              #f5f0e8;
  --color-surface:         #faf6ee;
  --color-surface-2:       #fffdf8;
  --color-surface-offset:  #ede7d5;
  --color-divider:         #d6cdb8;
  --color-border:          #c8bea6;

  --color-text:            #1a1509;
  --color-text-muted:      #6b6045;
  --color-text-faint:      #b0a488;
  --color-text-inverse:    #f5f0e8;

  /* Phosphor Green — primary accent */
  --color-primary:         #1a7a2e;
  --color-primary-hover:   #145d23;
  --color-primary-active:  #0e4219;
  --color-primary-glow:    rgba(26, 122, 46, 0.18);

  /* Amber — secondary accent */
  --color-amber:           #c47b0a;
  --color-amber-hover:     #a36208;
  --color-amber-glow:      rgba(196, 123, 10, 0.15);

  /* Scan line tint */
  --scanline-color:        rgba(0,0,0,0.03);

  --shadow-sm: 0 1px 3px rgba(30,20,0,0.07);
  --shadow-md: 0 4px 14px rgba(30,20,0,0.10);
  --shadow-lg: 0 12px 36px rgba(30,20,0,0.14);
  --shadow-glow: 0 0 20px var(--color-primary-glow);
}

/* ============================================
   DARK MODE — Retrofuturist Night
   Deep space + phosphor green + amber
   ============================================ */
[data-theme="dark"], 
@media (prefers-color-scheme: dark) { :root:not([data-theme]) {
  --color-bg:              #080c0a;
  --color-surface:         #0d1210;
  --color-surface-2:       #111714;
  --color-surface-offset:  #0a0f0d;
  --color-divider:         #1a2520;
  --color-border:          #243029;

  --color-text:            #c8e8d0;
  --color-text-muted:      #6b9978;
  --color-text-faint:      #3d5c45;
  --color-text-inverse:    #080c0a;

  --color-primary:         #39d460;
  --color-primary-hover:   #2ab84f;
  --color-primary-active:  #1e9a3e;
  --color-primary-glow:    rgba(57, 212, 96, 0.22);

  --color-amber:           #f0a830;
  --color-amber-hover:     #d98e1a;
  --color-amber-glow:      rgba(240, 168, 48, 0.20);

  --scanline-color:        rgba(57, 212, 96, 0.025);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 36px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 24px var(--color-primary-glow);
}}

[data-theme="dark"] {
  --color-bg:              #080c0a;
  --color-surface:         #0d1210;
  --color-surface-2:       #111714;
  --color-surface-offset:  #0a0f0d;
  --color-divider:         #1a2520;
  --color-border:          #243029;
  --color-text:            #c8e8d0;
  --color-text-muted:      #6b9978;
  --color-text-faint:      #3d5c45;
  --color-text-inverse:    #080c0a;
  --color-primary:         #39d460;
  --color-primary-hover:   #2ab84f;
  --color-primary-active:  #1e9a3e;
  --color-primary-glow:    rgba(57, 212, 96, 0.22);
  --color-amber:           #f0a830;
  --color-amber-hover:     #d98e1a;
  --color-amber-glow:      rgba(240, 168, 48, 0.20);
  --scanline-color:        rgba(57, 212, 96, 0.025);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 36px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 24px var(--color-primary-glow);
}

/* ============================================
   SCANLINE OVERLAY — atmospheric texture
   ============================================ */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    to bottom,
    var(--scanline-color) 0px,
    var(--scanline-color) 1px,
    transparent 1px,
    transparent 3px
  );
  pointer-events: none;
  z-index: 9999;
  opacity: 0.6;
}

/* ============================================
   GRID BACKGROUND
   ============================================ */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(var(--color-primary-glow) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-primary-glow) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
}

/* ============================================
   NAVIGATION
   ============================================ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.88);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  transition: box-shadow var(--transition);
}

.site-nav.scrolled {
  box-shadow: var(--shadow-md), 0 0 20px var(--color-primary-glow);
}

.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav-logo-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.nav-wordmark {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  line-height: 1.1;
}

.nav-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  display: block;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--space-2) 0;
  border-bottom: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  background: var(--color-surface);
}

.theme-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary-glow);
}

.nav-mobile-toggle {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  background: var(--color-surface);
  flex-direction: column;
  gap: 5px;
}

.nav-mobile-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--transition), opacity var(--transition);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open { 
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-6) var(--space-8);
    gap: var(--space-4);
  }
  .nav-mobile-toggle { display: flex; }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  z-index: 1;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: clamp(var(--space-16), 10vw, var(--space-32)) 0;
}

.hero-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  width: 100%;
}

.hero-content {
  position: relative;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hero-tag::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-primary);
}

.hero-name {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.05;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.hero-name-accent {
  color: var(--color-primary);
  display: block;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-amber);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero-bio {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 52ch;
  margin-bottom: var(--space-10);
}

.hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

.stat {
  position: relative;
}

.stat-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  display: block;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--space-1);
  display: block;
}

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

.btn-primary {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 0 16px var(--color-primary-glow);
}

.btn-outline {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  background: transparent;
  border: 1px solid var(--color-primary);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.btn-outline:hover {
  background: var(--color-primary-glow);
  box-shadow: 0 0 16px var(--color-primary-glow);
}

/* Hero portrait */
.hero-portrait {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.portrait-frame {
  position: relative;
  width: 320px;
  height: 380px;
  flex-shrink: 0;
}

.portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  filter: grayscale(20%) contrast(1.05);
}

.portrait-overlay {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(
    135deg,
    var(--color-primary-glow) 0%,
    transparent 60%
  );
  pointer-events: none;
}

.portrait-corner {
  position: absolute;
  width: 18px;
  height: 18px;
  border-color: var(--color-primary);
  border-style: solid;
  opacity: 0.8;
}

.portrait-corner.tl { top: -4px; left: -4px; border-width: 2px 0 0 2px; }
.portrait-corner.tr { top: -4px; right: -4px; border-width: 2px 2px 0 0; }
.portrait-corner.bl { bottom: -4px; left: -4px; border-width: 0 0 2px 2px; }
.portrait-corner.br { bottom: -4px; right: -4px; border-width: 0 2px 2px 0; }

.portrait-badge {
  position: absolute;
  bottom: -12px;
  right: -12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.badge-affil {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 1.3;
}

.badge-affil strong {
  color: var(--color-amber);
  display: block;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-tag { justify-content: center; }
  .hero-bio { margin: 0 auto var(--space-10); }
  .hero-stats { justify-content: center; }
  .hero-cta { justify-content: center; }
  .hero-portrait { order: -1; }
  .portrait-frame { width: 200px; height: 240px; }
}

/* ============================================
   SECTIONS — shared layout
   ============================================ */
section {
  position: relative;
  z-index: 1;
}

.section-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-8);
}

.section-header {
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.section-eyebrow::before {
  content: '//';
  opacity: 0.5;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

/* ============================================
   RESEARCH INTERESTS
   ============================================ */
.research-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.research-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-amber));
  opacity: 0;
  transition: opacity var(--transition);
}

.research-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md), 0 0 16px var(--color-primary-glow);
  transform: translateY(-2px);
}

.research-card:hover::before {
  opacity: 1;
}

.research-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.research-name {
  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;
}

.research-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
  max-width: 100%;
}

/* ============================================
   PUBLICATIONS
   ============================================ */
.publications-section {
  background: var(--color-bg);
}

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

.pub-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid transparent;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: var(--space-6) var(--space-8);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-4) var(--space-6);
  align-items: start;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.pub-item:hover {
  border-left-color: var(--color-primary);
  box-shadow: var(--shadow-sm), -2px 0 16px var(--color-primary-glow);
}

.pub-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.05em;
  padding-top: 3px;
  min-width: 2ch;
  opacity: 0.7;
}

.pub-body {
  min-width: 0;
}

.pub-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: var(--space-2);
  max-width: 100%;
}

.pub-authors {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-bottom: var(--space-2);
  max-width: 100%;
}

.pub-authors strong {
  color: var(--color-amber);
  font-weight: 600;
}

.pub-venue {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.pub-badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
  align-self: start;
}

.pub-badge.review {
  background: color-mix(in srgb, var(--color-amber) 12%, transparent);
  color: var(--color-amber);
  border: 1px solid color-mix(in srgb, var(--color-amber) 30%, transparent);
}

.pub-badge.published {
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
}

@media (max-width: 680px) {
  .pub-item {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  .pub-num { display: none; }
  .pub-badge { justify-self: start; }
}

/* ============================================
   TIMELINE — Experience & Education
   ============================================ */
.timeline-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.timeline-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

@media (max-width: 768px) {
  .timeline-cols { grid-template-columns: 1fr; gap: var(--space-12); }
}

.timeline-block-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.timeline {
  position: relative;
  padding-left: var(--space-6);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-primary), transparent);
  opacity: 0.4;
}

.timeline-entry {
  position: relative;
  margin-bottom: var(--space-8);
}

.timeline-entry::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-6) - 3px);
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 6px var(--color-primary-glow);
}

.entry-period {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

.entry-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: var(--space-1);
}

.entry-org {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ============================================
   GRANTS / PROJECTS
   ============================================ */
.grants-section {
  background: var(--color-bg);
}

.grants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.grant-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}

.grant-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0.4;
}

.grant-role {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-amber);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.grant-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: var(--space-4);
  max-width: 100%;
}

.grant-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.grant-meta-item {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.grant-meta-item span {
  color: var(--color-primary);
}

/* ============================================
   SKILLS / TECH
   ============================================ */
.skills-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background var(--transition), box-shadow var(--transition);
}

.skill-tag:hover {
  background: color-mix(in srgb, var(--color-primary) 16%, transparent);
  box-shadow: 0 0 8px var(--color-primary-glow);
}

/* ============================================
   CONTACT / FOOTER
   ============================================ */
.contact-section {
  background: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 680px) {
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-10); }
}

.contact-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 52ch;
}

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

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
  color: var(--color-text);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.contact-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md), 0 0 12px var(--color-primary-glow);
  transform: translateX(4px);
}

.contact-link-icon {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-link-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
}

.contact-link-value {
  font-size: var(--text-sm);
  color: var(--color-text);
  display: block;
  word-break: break-all;
}

/* Citation counter / Scholar card */
.scholar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  box-shadow: var(--shadow-md);
}

.scholar-num {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  display: block;
  margin-bottom: var(--space-2);
}

.scholar-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.scholar-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.08em;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 40%, transparent);
  padding-bottom: 2px;
}

.scholar-link:hover {
  border-bottom-color: var(--color-primary);
}

/* Footer */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
}

.footer-copy a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-copy a:hover { color: var(--color-primary); }

.footer-credit {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-credit a {
  color: var(--color-primary);
  text-decoration: none;
}

/* ============================================
   DIVIDER
   ============================================ */
.divider-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  border: none;
}

/* ============================================
   SCROLL REVEAL
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-stagger.visible > *:nth-child(1) { opacity: 1; transform: none; transition-delay: 0ms; }
.reveal-stagger.visible > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 60ms; }
.reveal-stagger.visible > *:nth-child(3) { opacity: 1; transform: none; transition-delay: 120ms; }
.reveal-stagger.visible > *:nth-child(4) { opacity: 1; transform: none; transition-delay: 180ms; }
.reveal-stagger.visible > *:nth-child(5) { opacity: 1; transform: none; transition-delay: 240ms; }
.reveal-stagger.visible > *:nth-child(6) { opacity: 1; transform: none; transition-delay: 300ms; }
.reveal-stagger.visible > *:nth-child(7) { opacity: 1; transform: none; transition-delay: 360ms; }
.reveal-stagger.visible > *:nth-child(8) { opacity: 1; transform: none; transition-delay: 420ms; }

/* ============================================
   TERMINAL CURSOR BLINK
   ============================================ */
.cursor-blink::after {
  content: '█';
  color: var(--color-primary);
  animation: blink 1.1s step-end infinite;
  margin-left: 2px;
  font-weight: 400;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ============================================
   SECTION SEPARATOR
   ============================================ */
.sep {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-12);
  opacity: 0.7;
}

.sep::before, .sep::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-divider);
}

/* Portrait fallback — hidden by default, shown via JS onerror */
.portrait-fallback {
  display: none;
  position: absolute;
  inset: 0;
}

/* ============================================
   MOBILE OPTIMIZATIONS (max-width: 480px)
   ============================================ */
@media (max-width: 480px) {
  /* Nav — keep logo on one line */
  .nav-inner,
  .section-inner,
  .footer-inner { padding-left: var(--space-5); padding-right: var(--space-5); }

  .nav-sub { display: none; }

  .nav-wordmark { font-size: var(--text-xs); letter-spacing: 0.08em; }

  .nav-logo-mark { width: 28px; height: 28px; }

  /* Hero — tighten up */
  .hero {
    padding: var(--space-8) 0 var(--space-12);
    min-height: auto;
  }

  .hero-inner { gap: var(--space-8); }

  .hero-name { font-size: clamp(2.4rem, 12vw, 3.2rem); }

  .hero-bio { font-size: var(--text-sm); }

  /* Stats — keep on one row */
  .hero-stats {
    display: flex;
    gap: var(--space-5);
    flex-wrap: nowrap;
  }

  .stat-num { font-size: var(--text-lg); }
  .stat-label { font-size: 0.65rem; }

  /* CTA buttons — 2x2 grid */
  .hero-cta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .btn-primary,
  .btn-outline {
    font-size: 0.7rem;
    padding: var(--space-3) var(--space-3);
    justify-content: center;
    letter-spacing: 0.05em;
  }

  /* Portrait — tighter */
  .portrait-frame { width: 220px; height: 260px; }

  .portrait-badge {
    bottom: -10px;
    right: -8px;
    padding: var(--space-2) var(--space-3);
  }

  .badge-affil { font-size: 0.6rem; }

  /* Section headers */
  .section-title { font-size: clamp(1.6rem, 7vw, 2.2rem); }

  /* Research cards — single column */
  .research-grid { grid-template-columns: 1fr; gap: var(--space-3); }
  .research-card { padding: var(--space-5); }

  /* Publications */
  .pub-item {
    padding: var(--space-4) var(--space-5);
    grid-template-columns: 1fr auto;
  }

  /* Grants — single column */
  .grants-grid { grid-template-columns: 1fr; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-8); }

  /* Scholar card numbers */
  .scholar-num { font-size: clamp(2rem, 10vw, 3rem); }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  /* Timeline */
  .timeline-cols { grid-template-columns: 1fr; gap: var(--space-8); }
}

/* Also handle narrow tablets (481-768px) */
@media (min-width: 481px) and (max-width: 768px) {
  .hero-cta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .btn-primary,
  .btn-outline {
    font-size: var(--text-xs);
    justify-content: center;
  }

  .portrait-frame { width: 240px; height: 290px; }

  .research-grid { grid-template-columns: 1fr 1fr; }
  .grants-grid { grid-template-columns: 1fr; }
}