@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* LIGHT MODE (variables) */
  --bg: #F5F1E7;
  --card: #ffffff;
  --card-elevated: #f8fafc;
  --border: #cbd5e1;
  --border-hover: #94a3b8;
  --primary: #D00000;
  --primary-hover: #a30000;
  --primary-light: rgba(208, 0, 0, 0.08);
  --primary-border: rgba(208, 0, 0, 0.25);
  --accent: #b45309;
  --accent-light: rgba(245, 158, 11, 0.12);
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --nav-bg: rgba(245, 241, 231, 0.85);
}

.dark {
  /* DARK MODE */
  --bg: #09090b;
  --card: #141416;
  --card-elevated: #1e1e21;
  --border: #27272a;
  --border-hover: #3f3f46;
  --primary: #D00000;
  --primary-hover: #FF3333;
  --primary-light: rgba(208, 0, 0, 0.12);
  --primary-border: rgba(208, 0, 0, 0.35);
  --accent: #FACC15;
  --accent-light: rgba(250, 204, 21, 0.12);
  --ink: #f8fafc;
  --ink-soft: #e2e8f0;
  --muted: #94a3b8;
  --nav-bg: rgba(9, 9, 11, 0.85);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--ink);
  background-color: var(--bg);
  transition: background-color 0.3s ease, color 0.3s ease;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* Background grid pattern */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  opacity: 0.3;
  mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
}

/* Ambient blob for background flair */
.ambient-blob {
  position: absolute;
  filter: blur(100px);
  z-index: -1;
  border-radius: 50%;
  opacity: 0.5;
  pointer-events: none;
}

/* Glass card component */
.glass-card {
  background-color: rgba(20, 20, 22, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 1rem; /* rounded-2xl */
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 40px -10px rgba(208, 0, 0, 0.25);
  border-color: var(--primary-border);
}

/* Navigation */
.nav-glass {
  background-color: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Typography elements */
.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent; /* fallback */
}

/* Animations */
@keyframes gradientMove {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.animate-gradient {
  background-size: 200% auto;
  animation: gradientMove 6s infinite ease-in-out;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* Theme toggle icon */
.toggle-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.sun-icon, .moon-icon {
  position: absolute;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html:not(.dark) .moon-icon {
  opacity: 0;
  transform: rotate(90deg);
}
html:not(.dark) .sun-icon {
  opacity: 1;
  transform: rotate(0);
}

.dark .sun-icon {
  opacity: 0;
  transform: rotate(-90deg);
}
.dark .moon-icon {
  opacity: 1;
  transform: rotate(0);
}

/* Timeline components */
.timeline-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--primary);
  position: absolute;
  box-shadow: 0 0 0 4px var(--bg);
  transition: background-color 0.3s, box-shadow 0.3s;
}

/* Carousel */
.carousel-container {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  gap: 1.5rem;
  padding-bottom: 1rem;
}

.carousel-container::-webkit-scrollbar {
  display: none;
}

.carousel-item {
  scroll-snap-align: start;
  flex-shrink: 0;
  border-radius: 1rem;
  overflow: hidden;
}

/* Tags */
.tag {
  display: inline-flex;
  padding: 0.375rem 0.75rem;
  background-color: var(--card-elevated);
  color: var(--ink-soft);
  font-family: monospace;
  font-size: 0.75rem;
  border-radius: 0.5rem;
  font-weight: 600;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.tag-primary {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
}

.tag-accent {
  background-color: var(--accent-light);
  color: var(--accent);
  border-color: rgba(250, 204, 21, 0.35);
}
html:not(.dark) .tag-accent {
  border-color: rgba(245, 158, 11, 0.35);
}

/* Section label */
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

/* Specific cards */
.publication-card {
  border-left: 3px solid var(--primary);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary);
  color: #ffffff;
  padding: 0.875rem 1.5rem;
  border-radius: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 14px 0 rgba(208, 0, 0, 0.39);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(208, 0, 0, 0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: 1px solid var(--border);
  color: var(--ink);
  padding: 0.875rem 1.5rem;
  border-radius: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.btn-secondary:hover {
  background-color: var(--card-elevated);
  transform: translateY(-4px);
}

/* Fade in animation classes */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background-color: var(--primary);
  z-index: 9999;
  transition: width 0.1s ease-out;
  width: 0%;
}

/* Webkit Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--border);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--primary);
}

/* Image overlay for stock */
img.stock-overlay {
  object-fit: cover;
  transition: filter 0.3s ease;
}

.dark img.stock-overlay {
  filter: brightness(0.7);
}
html:not(.dark) img.stock-overlay {
  filter: brightness(1);
}

/* Responsive */
@media (max-width: 768px) {
  .btn-primary, .btn-secondary {
    width: 100%;
    margin-bottom: 0.5rem;
  }
  
  .glass-card {
    padding: 1.5rem;
  }
}

/* Print styles */
@media print {
  body {
    background-color: white !important;
    color: black !important;
  }
  
  .bg-grid, .ambient-blob, .nav-glass, .scroll-progress {
    display: none !important;
  }
  
  .glass-card {
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    break-inside: avoid;
  }
}

html:not(.dark) .glass-card { background-color: rgba(255, 255, 255, 0.9); }