/* ============================================================
   site.css — All styles for the custom Hugo site
   ============================================================ */

/* --- Font Imports --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&family=Outfit:wght@400;500;600;700;800&family=Newsreader:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --purple: #7B2FBE;
  --blue: #2563EB;
  --cyan: #06B6D4;
  --green: #10B981;
  --yellow: #EAB308;
  --orange: #F97316;
  --red: #EF4444;

  --seedling: #06B6D4;
  --budding: #EAB308;
  --evergreen: #10B981;

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-serif: 'Newsreader', serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* --- Base Reset --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* --- Dark Theme --- */
.theme-dark {
  --bg-primary: #050816;
  --bg-secondary: #0a0e1f;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --bg-glass: rgba(5, 8, 22, 0.75);
  --text-primary: #f0f0f5;
  --text-secondary: rgba(240, 240, 245, 0.7);
  --text-muted: rgba(240, 240, 245, 0.4);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  background: #050816;
  color: var(--text-primary);
}

/* --- Light Theme --- */
.theme-light {
  --bg-primary: #FAFAF5;
  --bg-secondary: #F0F0EA;
  --bg-card: rgba(0, 0, 0, 0.03);
  --bg-card-hover: rgba(0, 0, 0, 0.06);
  --bg-glass: rgba(250, 250, 245, 0.85);
  --text-primary: #1a1a2e;
  --text-secondary: rgba(26, 26, 46, 0.7);
  --text-muted: rgba(26, 26, 46, 0.45);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  background: #FAFAF5;
  color: var(--text-primary);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100svh;
  min-height: 600px;
  overflow: hidden;
  transition: background 0.4s ease;
}

.hero canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  will-change: transform;
  touch-action: pan-y;
}

#voronoiCanvas { cursor: crosshair; }

.hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2xl) var(--space-xl);
  z-index: 10;
}

.hero-glass {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  max-width: 640px;
}

.hero-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.hero-subtitle {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.hero-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --- Nav Bar --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: var(--space-md) var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-slow);
}

.nav.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
}

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

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-gear {
  display: flex;
  align-items: center;
  margin-left: var(--space-xs);
  padding-left: var(--space-md);
  border-left: 1px solid var(--border-subtle);
}

.nav .ctrl-toggle {
  position: static;
}

.theme-toggle {
  position: static;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
  line-height: 1;
}

.theme-toggle:hover {
  background: var(--bg-card-hover);
  transform: scale(1.08);
}

/* --- Mode Toggle (segmented control) --- */
.mode-toggle {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 2px;
}

.mode-btn {
  padding: 5px 16px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  text-transform: uppercase;
  white-space: nowrap;
}

.mode-btn:hover { color: var(--text-secondary); }

.mode-btn.active {
  background: var(--bg-glass);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* --- Section Layout --- */
.section {
  padding: var(--space-3xl) var(--space-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  opacity: 1;
  transition: background var(--transition-base),
              border-color var(--transition-base),
              transform var(--transition-base),
              opacity var(--transition-base);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.card.hidden { display: none; }

.card-badges {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.card-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.card-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-md);
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.card-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: var(--space-sm);
}

/* --- Badges & Pills --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
}

.badge-tag {
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

.badge-type {
  font-weight: 600;
}

.badge-type.project     { color: var(--cyan); }
.badge-type.publication { color: var(--purple); }

/* --- Filter Controls --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.filter-btn {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--text-primary);
  border-color: var(--text-primary);
  background: var(--bg-card-hover);
}

/* --- Footer --- */
.footer {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Control Panel --- */
.ctrl-toggle {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 200;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
  line-height: 1;
}

.ctrl-toggle:hover {
  background: var(--bg-card-hover);
  transform: scale(1.08);
}

.ctrl-panel {
  position: fixed;
  top: 56px;
  right: 12px;
  z-index: 199;
  width: 280px;
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: none;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.ctrl-panel.open { display: block; }

.ctrl-panel h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-primary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.ctrl-group {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.ctrl-group:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.ctrl-group-label {
  font-weight: 600;
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.ctrl-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.ctrl-row label {
  color: var(--text-secondary);
  flex-shrink: 0;
  margin-right: 8px;
}

.ctrl-row .ctrl-val {
  color: var(--text-muted);
  min-width: 44px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.ctrl-row input[type="range"] {
  flex: 1;
  min-width: 0;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border-subtle);
  border-radius: 2px;
  outline: none;
  margin: 0 6px;
}

.ctrl-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  border: 2px solid var(--bg-primary);
}

.ctrl-row input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  border: 2px solid var(--bg-primary);
}

.ctrl-row select {
  flex: 1;
  min-width: 0;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 3px 6px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  margin-left: 6px;
  cursor: pointer;
}

.ctrl-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ctrl-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

/* --- Inner Page Content --- */
.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: calc(80px + var(--space-3xl)) var(--space-xl) var(--space-3xl);
}

.page-content .page-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--text-primary);
  margin-bottom: var(--space-2xl);
}

/* --- Prose (long-form content) --- */
.prose {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.prose h1 { font-size: 2rem; font-weight: 800; }
.prose h2 { font-size: 1.5rem; font-weight: 700; }
.prose h3 { font-size: 1.25rem; font-weight: 600; }

.prose p {
  margin-bottom: var(--space-lg);
}

.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose a:hover {
  color: var(--blue);
}

.prose img {
  border-radius: var(--radius-md);
  margin: var(--space-xl) 0;
}

.prose ul, .prose ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.prose li {
  margin-bottom: var(--space-xs);
}

.prose hr {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: var(--space-2xl) 0;
}

.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

.prose em {
  font-style: italic;
}

.prose blockquote {
  border-left: 3px solid var(--cyan);
  padding-left: var(--space-lg);
  margin: var(--space-xl) 0;
  color: var(--text-muted);
  font-style: italic;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: 4px;
}

.prose pre {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  overflow-x: auto;
  margin: var(--space-xl) 0;
}

.prose pre code {
  background: none;
  padding: 0;
}

/* --- About Page --- */
.about-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-sidebar {
  text-align: center;
}

.about-avatar {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: var(--space-lg);
}

.about-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.about-role {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.about-social {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.about-social a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 4px 10px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.about-social a:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

.about-actions {
  margin-top: var(--space-2xl);
}

.btn-cv {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn-cv:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

/* --- Project Detail Page --- */
.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 14px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.project-link:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-card);
}

/* --- Inner pages with nav --- */
.page-inner .nav {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

/* --- Mobile Nav Hamburger --- */
.nav-hamburger {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast);
  position: relative;
  z-index: 201;
}

.nav-hamburger:hover {
  background: var(--bg-card-hover);
}

.nav-hamburger-icon,
.nav-hamburger-icon::before,
.nav-hamburger-icon::after {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

.nav-hamburger-icon {
  position: relative;
}

.nav-hamburger-icon::before,
.nav-hamburger-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 16px;
}

.nav-hamburger-icon::before {
  top: -5px;
}

.nav-hamburger-icon::after {
  top: 5px;
}

/* Hamburger open state (X) */
.nav-hamburger.open .nav-hamburger-icon {
  background: transparent;
}

.nav-hamburger.open .nav-hamburger-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-hamburger.open .nav-hamburger-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Mobile nav dropdown */
.nav-mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 199;
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
}

.nav-mobile-menu.open {
  display: flex;
}

.nav-mobile-menu a {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-md) var(--space-xl);
  transition: color var(--transition-fast);
}

.nav-mobile-menu a:hover {
  color: var(--text-primary);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero {
    min-height: 500px;
  }

  .hero-overlay {
    padding: var(--space-lg) var(--space-md);
    padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom, 0px));
  }

  .hero-glass {
    padding: var(--space-lg);
  }

  .section {
    padding: var(--space-2xl) var(--space-md);
  }

  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .mode-toggle .mode-btn { padding: 4px 10px; font-size: 0.6rem; }
  .nav-gear { display: none; }
  .ctrl-panel { display: none !important; }

  .about-section {
    grid-template-columns: 1fr;
  }

  .about-sidebar {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .page-content {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero {
    min-height: 400px;
    height: 100svh;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}