/* style.css — Pavan Paidy EB-1A Premium Cybersecurity Portfolio */

/* ========================================================================
   DESIGN TOKENS
   ======================================================================== */

: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;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Font families */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  /* Gold accent */
  --color-gold: #d4a853;
  --color-gold-hover: #e0bc6e;
  --color-gold-dim: rgba(212, 168, 83, 0.15);
}

/* ========================================================================
   DARK MODE (default)
   ======================================================================== */

:root, [data-theme="dark"] {
  --color-bg:             #0a0e14;
  --color-surface:        #111820;
  --color-surface-2:      #161e28;
  --color-surface-3:      #1a2332;
  --color-surface-offset: #0d1117;
  --color-divider:        #1e2a3a;
  --color-border:         #243040;

  --color-text:           #e2e8f0;
  --color-text-muted:     #94a3b8;
  --color-text-faint:     #64748b;
  --color-text-inverse:   #0a0e14;

  --color-primary:        #0891b2;
  --color-primary-hover:  #06b6d4;
  --color-primary-active: #22d3ee;
  --color-primary-glow:   rgba(8, 145, 178, 0.25);

  --color-warning:        #d97706;
  --color-error:          #dc2626;
  --color-success:        #16a34a;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(8, 145, 178, 0.15);

  /* Glass effects */
  --glass-bg: rgba(17, 24, 32, 0.6);
  --glass-border: rgba(36, 48, 64, 0.5);
  --glass-blur: 16px;
}

/* ========================================================================
   LIGHT MODE
   ======================================================================== */

[data-theme="light"] {
  --color-bg:             #f8fafc;
  --color-surface:        #ffffff;
  --color-surface-2:      #f1f5f9;
  --color-surface-3:      #e8edf3;
  --color-surface-offset: #e2e8f0;
  --color-divider:        #cbd5e1;
  --color-border:         #94a3b8;

  --color-text:           #0f172a;
  --color-text-muted:     #475569;
  --color-text-faint:     #94a3b8;
  --color-text-inverse:   #f8fafc;

  --color-primary:        #0e7490;
  --color-primary-hover:  #0891b2;
  --color-primary-active: #06b6d4;
  --color-primary-glow:   rgba(14, 116, 144, 0.12);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 40px rgba(14, 116, 144, 0.08);

  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(203, 213, 225, 0.5);
  --glass-blur: 16px;
}

/* ========================================================================
   HEADER / NAVIGATION
   ======================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: box-shadow 0.3s var(--ease-out),
              background 0.3s var(--ease-out);
}

.site-header--scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-link:hover { color: var(--color-primary); }

.logo-link svg {
  width: 36px;
  height: 36px;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

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

.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-active));
  transition: width 0.3s var(--ease-out);
}

.nav-links a:hover { color: var(--color-text); }
.nav-links a:hover::after { width: 100%; }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.06);
}

[data-theme="light"] .theme-toggle:hover {
  background: rgba(0,0,0,0.06);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-1);
    border-bottom: 1px solid var(--glass-border);
  }

  .nav-links.active { display: flex; }

  .nav-links li { width: 100%; }

  .nav-links a {
    font-size: var(--text-base);
    padding: var(--space-3) var(--space-4);
    display: block;
    border-radius: var(--radius-md);
  }

  .nav-links a:hover {
    background: rgba(8, 145, 178, 0.08);
  }

  .nav-links a::after { display: none; }
}

/* ========================================================================
   HERO SECTION
   ======================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--space-32) var(--space-6) var(--space-16);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 0%, transparent 0%, var(--color-bg) 70%),
    linear-gradient(180deg,
      rgba(10,14,20,0.3) 0%,
      rgba(10,14,20,0.5) 40%,
      rgba(10,14,20,0.95) 100%
    );
}

[data-theme="light"] .hero-bg::after {
  background:
    radial-gradient(ellipse at 50% 0%, transparent 0%, var(--color-bg) 70%),
    linear-gradient(180deg,
      rgba(248,250,252,0.3) 0%,
      rgba(248,250,252,0.5) 40%,
      rgba(248,250,252,0.95) 100%
    );
}

/* Particle canvas */
#particles-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--content-default);
}

/* Animated gradient name */
.hero-name {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
  background: linear-gradient(
    135deg,
    var(--color-text) 0%,
    var(--color-primary-active) 25%,
    var(--color-text) 50%,
    var(--color-primary-hover) 75%,
    var(--color-text) 100%
  );
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient-shift 8s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-primary);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

/* Gradient line under subtitle */
.hero-line {
  width: 120px;
  height: 2px;
  margin: 0 auto var(--space-8);
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  animation: line-pulse 3s ease-in-out infinite;
}

@keyframes line-pulse {
  0%, 100% { opacity: 0.4; width: 120px; }
  50% { opacity: 1; width: 200px; }
}

.hero-tagline {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto var(--space-10);
  line-height: 1.8;
}

/* Hero CTAs */
.hero-ctas {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: all 0.3s var(--ease-out);
  min-height: 48px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  color: #fff;
  box-shadow: 0 4px 20px var(--color-primary-glow);
}

.btn-primary:hover {
  box-shadow: 0 8px 32px var(--color-primary-glow);
  filter: brightness(1.1);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(8, 145, 178, 0.06);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  animation: scroll-bounce 2s ease-in-out infinite;
}

.scroll-indicator span {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

@keyframes scroll-bounce {
  0%, 100% { opacity: 0.4; transform: translateX(-50%) translateY(0); }
  50% { opacity: 1; transform: translateX(-50%) translateY(6px); }
}

/* ========================================================================
   SECTIONS — General
   ======================================================================== */

.section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  padding-inline: var(--space-6);
  position: relative;
}

.section--dark { background-color: var(--color-bg); }
.section--surface { background-color: var(--color-surface); }
.section--surface-2 { background-color: var(--color-surface-2); }

[data-theme="light"] .section--dark { background-color: #f1f5f9; }
[data-theme="light"] .section--surface { background-color: #ffffff; }
[data-theme="light"] .section--surface-2 { background-color: #f8fafc; }

.section-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 600;
  margin-bottom: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: rgba(8, 145, 178, 0.08);
  border-radius: var(--radius-full);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 640px;
  margin-bottom: var(--space-12);
  line-height: 1.7;
}

/* ========================================================================
   ABOUT SECTION — Split layout
   ======================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-12);
  align-items: start;
}

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

.stat-item {
  padding: var(--space-5) var(--space-6);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  display: block;
  line-height: 1.1;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

.about-content {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-8);
}

.about-content p {
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.about-content p:last-of-type { margin-bottom: 0; }

.about-quote {
  margin-top: var(--space-8);
  padding: var(--space-6) var(--space-8);
  background: linear-gradient(135deg, rgba(8,145,178,0.06), rgba(8,145,178,0.02));
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-primary);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  font-style: italic;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .about-stats {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .stat-item { flex: 1; min-width: 140px; }

  .about-content {
    border-left: none;
    padding-left: 0;
    border-top: 3px solid var(--color-primary);
    padding-top: var(--space-8);
  }
}

/* ========================================================================
   EXPERTISE SECTION — Bento Grid
   ======================================================================== */

.expertise-bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: var(--space-5);
}

.bento-card {
  position: relative;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  transition: border-color 0.4s var(--ease-out),
              box-shadow 0.4s var(--ease-out);
}

/* Gradient border on hover */
.bento-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: linear-gradient(135deg, transparent, transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
}

.bento-card:hover::before {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-active), var(--color-primary));
  opacity: 1;
}

.bento-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

/* Primary card spans 2 rows */
.bento-card--primary {
  grid-row: 1 / 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.bento-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
  opacity: 0.8;
}

.bento-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.bento-card--primary h3 {
  font-size: var(--text-xl);
}

.bento-card p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.bento-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.bento-tag {
  font-size: var(--text-xs);
  color: var(--color-primary);
  background: rgba(8, 145, 178, 0.1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-weight: 500;
}

@media (max-width: 900px) {
  .expertise-bento {
    grid-template-columns: 1fr 1fr;
  }
  .bento-card--primary { grid-row: auto; }
}

@media (max-width: 600px) {
  .expertise-bento {
    grid-template-columns: 1fr;
  }
}

/* ========================================================================
   PUBLICATIONS SECTION — Full Bleed
   ======================================================================== */

.section--publications {
  position: relative;
  overflow: hidden;
}

.publications-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.publications-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
}

.publications-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    var(--color-surface) 0%,
    rgba(17,24,32,0.85) 15%,
    rgba(17,24,32,0.85) 85%,
    var(--color-surface) 100%
  );
}

[data-theme="light"] .publications-bg::after {
  background: linear-gradient(180deg,
    var(--color-surface) 0%,
    rgba(255,255,255,0.88) 15%,
    rgba(255,255,255,0.88) 85%,
    var(--color-surface) 100%
  );
}

.section--publications .section-inner {
  position: relative;
  z-index: 1;
}

/* Publication stats bar */
.pub-stats {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
  padding: var(--space-5) var(--space-8);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  flex-wrap: wrap;
}

.pub-stat {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 600;
}

.pub-stat-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
}

.pub-stat-label {
  color: var(--color-text-muted);
  font-weight: 400;
}

/* Books */
.publications-sub {
  margin-bottom: var(--space-16);
}

.publications-sub:last-child { margin-bottom: 0; }

.section-title--sm {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.book-card {
  padding: var(--space-8);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
  border-left: 3px solid var(--color-primary);
}

.book-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.book-card h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.book-card p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  flex: 1;
  line-height: 1.7;
}

.book-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}

.book-link:hover { color: var(--color-primary-hover); }
.book-link svg { display: inline; width: 16px; height: 16px; }

/* Research papers */
.papers-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.paper-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-divider);
  align-items: start;
  transition: background 0.2s var(--ease-out);
}

.paper-item:first-child { padding-top: 0; }
.paper-item:last-child { border-bottom: none; }

.paper-item--featured {
  padding: var(--space-6) var(--space-6);
  background: linear-gradient(135deg, rgba(8,145,178,0.08), rgba(8,145,178,0.02));
  border-radius: var(--radius-xl);
  border: 1px solid rgba(8,145,178,0.15);
  border-bottom: 1px solid rgba(8,145,178,0.15);
  margin-bottom: var(--space-4);
}

.paper-year {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text-faint);
  padding-top: var(--space-1);
  font-variant-numeric: tabular-nums;
}

.paper-badge {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--color-primary);
  background: rgba(8,145,178,0.15);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.paper-title {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  line-height: 1.4;
}

.paper-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.paper-title a:hover { color: var(--color-primary); }

.paper-journal {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: var(--space-1);
}

.paper-desc {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  line-height: 1.6;
}

.paper-doi {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  margin-top: var(--space-2);
}

.paper-doi:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .books-grid { grid-template-columns: 1fr; }
  .paper-item {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
  .paper-year { padding-top: 0; }
  .pub-stats {
    flex-direction: column;
    gap: var(--space-4);
  }
}

/* ========================================================================
   AWARDS SECTION — Gold Premium
   ======================================================================== */

.section--awards {
  --section-accent: var(--color-gold);
}

.section--awards .section-label {
  color: var(--color-gold);
  background: var(--color-gold-dim);
}

.awards-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

/* TITAN Featured Award */
.award-card--titan {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-10);
  background: linear-gradient(135deg, var(--color-surface-2) 0%, rgba(212,168,83,0.06) 100%);
  border: 1px solid rgba(212,168,83,0.2);
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
}

.award-card--titan::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(212,168,83,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.titan-trophy {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.titan-trophy img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-xl);
}

.titan-content { position: relative; z-index: 1; }

.titan-content .award-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-gold);
  background: var(--color-gold-dim);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.titan-content h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.titan-content p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

/* Regular award cards */
.award-card {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  transition: border-color 0.3s var(--ease-out);
}

.award-card:hover {
  border-color: rgba(212,168,83,0.3);
}

.award-card h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.award-card p {
  color: var(--color-text-muted);
  line-height: 1.7;
}

.award-subtitle {
  font-size: var(--text-sm);
  color: var(--color-gold);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.award-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gold);
  text-decoration: none;
  font-weight: 600;
  margin-top: var(--space-5);
  transition: color 0.2s;
}

.award-link:hover { color: var(--color-gold-hover); }
.award-link svg { display: inline; width: 16px; height: 16px; }

/* Judge badge style */
.award-card--judge {
  border-left: 3px solid var(--color-gold);
}

/* Full-width card */
.award-card--full {
  grid-column: 1 / -1;
}

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

  .award-card--titan {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .titan-trophy {
    width: 140px;
    height: 140px;
    margin: 0 auto;
  }
}

/* ========================================================================
   CONTRIBUTIONS SECTION — Impact Metrics
   ======================================================================== */

.contributions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.contribution-card {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  position: relative;
  transition: border-color 0.3s var(--ease-out);
}

.contribution-card:nth-child(odd) {
  border-left: 3px solid var(--color-primary);
}

.contribution-card:nth-child(even) {
  border-left: 3px solid var(--color-gold);
}

.contribution-card:hover {
  border-color: var(--glass-border);
}

.contribution-card:nth-child(odd):hover {
  border-left-color: var(--color-primary-hover);
}

.contribution-card:nth-child(even):hover {
  border-left-color: var(--color-gold-hover);
}

.impact-metric {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding: var(--space-2) var(--space-4);
  background: rgba(8,145,178,0.08);
  border-radius: var(--radius-full);
}

.contribution-card:nth-child(even) .impact-metric {
  background: var(--color-gold-dim);
}

.impact-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  line-height: 1;
}

.contribution-card:nth-child(even) .impact-number {
  color: var(--color-gold);
}

.impact-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.contribution-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.contribution-card > p {
  color: var(--color-text-muted);
  line-height: 1.7;
}

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

/* ========================================================================
   CONNECT SECTION
   ======================================================================== */

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

.connect-text h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.connect-text p {
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-8);
}

.connect-email-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-base);
  box-shadow: 0 4px 20px var(--color-primary-glow);
  transition: all 0.3s var(--ease-out);
}

.connect-email-btn:hover {
  box-shadow: 0 8px 32px var(--color-primary-glow);
  filter: brightness(1.1);
}

.connect-email-btn svg { display: inline; width: 20px; height: 20px; }

.connect-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.connect-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: border-color 0.3s var(--ease-out),
              box-shadow 0.3s var(--ease-out);
}

.connect-link:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px var(--color-primary-glow);
}

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

@media (max-width: 768px) {
  .connect-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .connect-links { grid-template-columns: 1fr; }
}

/* ========================================================================
   FOOTER
   ======================================================================== */

.site-footer {
  padding: var(--space-10) var(--space-6);
  background: var(--color-surface-offset);
  border-top: 1px solid var(--color-divider);
}

[data-theme="light"] .site-footer {
  background: #f1f5f9;
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

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

.footer-center {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.footer-attribution a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer-attribution a:hover { color: var(--color-text-muted); }

/* Back to top */
.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  transition: all 0.2s var(--ease-out);
}

.back-to-top:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.back-to-top svg { display: inline; width: 14px; height: 14px; }

@media (max-width: 600px) {
  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }
}

/* ========================================================================
   SCROLL ANIMATIONS (opacity-only per guidelines)
   ======================================================================== */

.fade-in {
  opacity: 0;
  transition: opacity 0.8s var(--ease-out);
}

.fade-in.visible { opacity: 1; }

/* Stagger children — opacity only */
.stagger > * {
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
}

.stagger.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger.visible > *:nth-child(2) { transition-delay: 80ms; }
.stagger.visible > *:nth-child(3) { transition-delay: 160ms; }
.stagger.visible > *:nth-child(4) { transition-delay: 240ms; }
.stagger.visible > *:nth-child(5) { transition-delay: 320ms; }
.stagger.visible > *:nth-child(6) { transition-delay: 400ms; }

.stagger.visible > * { opacity: 1; }

/* ========================================================================
   UTILITIES
   ======================================================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }