/* ============================================
   Fah Sathirapongsasuti — Personal Website
   AI-inspired dark-first theme
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Dark theme (default) */
  --bg: #0a0a0f;
  --bg-surface: #12121a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --border: #2a2a4a;
  --border-light: #1e1e38;
  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --gradient-start: #3b82f6;
  --gradient-end: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --header-bg: rgba(10,10,15,0.85);
  --code-bg: #1e1e2e;
  --tag-bg: rgba(59,130,246,0.15);
  --tag-text: #60a5fa;
  --canvas-particle: rgba(59,130,246,0.5);
  --canvas-line: rgba(6,182,212,0.12);
}

[data-theme="light"] {
  --bg: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --text: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent: #0891b2;
  --accent-hover: #0e7490;
  --gradient-start: #2563eb;
  --gradient-end: #0891b2;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --header-bg: rgba(248,250,252,0.85);
  --code-bg: #f1f5f9;
  --tag-bg: rgba(37,99,235,0.1);
  --tag-text: #2563eb;
  --canvas-particle: rgba(37,99,235,0.4);
  --canvas-line: rgba(8,145,178,0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent); }

img { max-width: 100%; height: auto; }

h1, h2, h3, h4 {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  line-height: 1.2;
}

/* --- Header / Nav --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.3s;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo .logo-accent {
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.2s;
  letter-spacing: -0.01em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: var(--tag-bg);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  font-size: 1.1rem;
  width: 38px;
  height: 38px;
}

.theme-toggle:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-greeting {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.15s forwards;
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.3s forwards;
}

.hero-credentials {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.45s forwards;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.6s forwards;
}

/* --- Buttons --- */
.btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(59,130,246,0.3);
  color: #fff;
}

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

.btn-outline:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.btn-sm {
  font-size: 0.75rem;
  padding: 0.4rem 0.8rem;
}

.btn-icon {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 8px;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-icon:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* --- Sections --- */
.section {
  padding: 5rem 2rem;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 3rem;
}

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
}

.section-alt {
  background: var(--bg-surface);
}

/* --- Bio Generator --- */
.bio-generator {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.bio-controls {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  align-items: flex-end;
}

.bio-control-group {
  flex: 1;
  min-width: 150px;
}

.bio-control-group label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.bio-select {
  width: 100%;
  padding: 0.6rem 1rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  transition: border-color 0.2s;
}

.bio-select:focus {
  outline: none;
  border-color: var(--primary);
}

.bio-generate-btn {
  flex-shrink: 0;
}

.bio-output {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  min-height: 100px;
  position: relative;
}

.bio-output-text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
}

.bio-output-text .cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--primary);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 0.8s step-end infinite;
}

.bio-output-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

.bio-powered-by {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 1rem;
}

/* --- Publication Cards --- */
.pub-toolbar {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  align-items: center;
}

.pub-search {
  flex: 1;
  min-width: 250px;
  position: relative;
}

.pub-search input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.2s;
}

.pub-search input:focus {
  outline: none;
  border-color: var(--primary);
}

.pub-search input::placeholder {
  color: var(--text-muted);
}

.pub-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.95rem;
  pointer-events: none;
}

.pub-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pub-role-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.pub-role-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  padding: 0.4rem 0.75rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.pub-role-chip:hover,
.pub-role-chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.pub-card-first {
  border-left: 3px solid var(--primary);
}

.pub-card-named {
  border-left: 3px solid var(--accent);
}

.pub-filter-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  padding: 0.4rem 0.75rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.pub-filter-chip:hover,
.pub-filter-chip.active {
  background: var(--tag-bg);
  color: var(--tag-text);
  border-color: var(--primary);
}

.pub-sort {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pub-sort label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.pub-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pub-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.2s;
}

.pub-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.pub-year-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(6,182,212,0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.pub-title {
  font-family: 'Inter', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.pub-title a {
  color: var(--text);
}

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

.pub-authors {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
  line-height: 1.5;
}

.pub-authors .highlight {
  color: var(--primary);
  font-weight: 600;
}

.pub-journal {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 0.75rem;
}

.pub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.pub-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--tag-text);
}

.pub-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pub-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--primary);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: all 0.2s;
}

.pub-link:hover {
  background: var(--tag-bg);
  border-color: var(--primary);
}

.pub-abstract {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: none;
}

.pub-abstract.expanded {
  display: block;
  animation: fadeIn 0.3s ease;
}

.pub-abstract-toggle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem 0;
  transition: color 0.2s;
}

.pub-abstract-toggle:hover {
  color: var(--primary);
}

.pub-empty {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
}

/* --- News Cards --- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.news-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--bg-surface);
}

.news-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.news-card-source {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.news-card-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.news-card-category {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--tag-text);
}

.news-card-title {
  font-family: 'Inter', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.news-card-title a {
  color: var(--text);
}

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

.news-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.news-card-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--primary);
  margin-top: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* --- Instagram Feed --- */
.instagram-section {
  margin-top: 3rem;
}

.instagram-feeds {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 2rem;
}

.instagram-feed {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.instagram-feed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-light);
}

.instagram-feed-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.instagram-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.instagram-username {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.instagram-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.instagram-follow-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.4rem 1rem;
  border-radius: 8px;
  border: none;
  background: linear-gradient(135deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
  color: #fff;
  cursor: pointer;
  transition: opacity 0.2s;
  text-decoration: none;
}

.instagram-follow-btn:hover {
  opacity: 0.85;
  color: #fff;
}

.instagram-feed-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  padding: 3px;
}

.instagram-post {
  aspect-ratio: 1;
  background: var(--bg-surface);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.instagram-post img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.instagram-post:hover img {
  transform: scale(1.05);
}

.instagram-post-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  gap: 1rem;
}

.instagram-post:hover .instagram-post-overlay {
  opacity: 1;
}

.instagram-placeholder {
  text-align: center;
}

.instagram-placeholder-banner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 2.5rem 1.5rem;
  border-radius: 8px 8px 0 0;
}

.instagram-placeholder-banner-text {
  color: #fff;
}

.instagram-placeholder-handle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
}

.instagram-placeholder-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 1rem 1.5rem 0;
  line-height: 1.6;
}

.instagram-cta-btn {
  display: inline-block;
  margin: 1rem 1.5rem 1.5rem;
  background: var(--bg-surface);
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  text-decoration: none;
  transition: all 0.2s;
}

.instagram-cta-btn:hover {
  background: var(--primary);
  color: #fff;
}

.instagram-feed-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-light);
  text-align: center;
}

.instagram-feed-footer a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--primary);
}

/* --- Highlights / Stats --- */
.highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.2s;
}

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

.highlight-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.highlight-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* --- Playground / Project Tiles --- */
.playground-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 2rem;
}

.playground-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.playground-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  color: inherit;
}

.playground-card-preview {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
}

.playground-card-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.playground-card:hover .playground-card-preview img {
  transform: scale(1.05);
}

.playground-card:hover .carousel .carousel-track img {
  transform: none;
}

.playground-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.playground-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.playground-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--tag-text);
  letter-spacing: 0.02em;
}

.playground-card-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.playground-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.playground-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

.playground-card-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.2s;
  cursor: pointer;
}

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

.playground-card-arrow {
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: all 0.2s;
}

.playground-card:hover .playground-card-arrow {
  color: var(--primary);
  transform: translateX(4px);
}

/* --- Carousel (inside playground card preview) --- */
.carousel {
  position: relative;
}

.carousel-track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.carousel-track img {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  object-fit: cover;
  scroll-snap-align: start;
  transition: none;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
}

.carousel-btn:hover {
  opacity: 1;
  background: rgba(0, 0, 0, 0.7);
}

.carousel-btn-prev {
  left: 6px;
}

.carousel-btn-next {
  right: 6px;
}

.carousel-dots {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 2;
}

.carousel-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
  transition: background 0.2s;
}

.carousel-dot.active {
  background: #fff;
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  padding: 3rem 2rem 2rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.footer-copyright {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes blink {
  50% { opacity: 0; }
}

@keyframes shimmer {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.15; }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Page Header (non-hero pages) --- */
.page-header {
  padding: 7rem 2rem 3rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
}

.page-header-inner {
  max-width: 1200px;
  margin: 0 auto;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }

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

  .mobile-menu-btn {
    display: block;
  }

  .hero {
    min-height: auto;
    padding: 8rem 1.5rem 4rem;
  }

  .section {
    padding: 3rem 1.5rem;
  }

  .bio-controls {
    flex-direction: column;
  }

  .pub-toolbar {
    flex-direction: column;
  }

  .pub-search {
    min-width: 100%;
  }

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

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

  .instagram-feeds {
    grid-template-columns: 1fr;
  }

  .highlights {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

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

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
}