/* ========================================
   Vincent Ho - Professional Portfolio
   Modern Dark Theme
   ======================================== */

/* ---------- Custom Properties ---------- */
:root {
  --color-bg: #09090b;
  --color-bg-alt: #111113;
  --color-surface: #18181b;
  --color-surface-hover: #222228;
  --color-card: #151518;
  --color-card-hover: #1c1c22;
  --color-border: #27272a;
  --color-border-light: #3f3f46;

  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;

  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-primary-glow: rgba(99, 102, 241, 0.12);
  --color-primary-subtle: rgba(99, 102, 241, 0.08);

  --color-accent: #06b6d4;
  --color-accent-hover: #22d3ee;

  --color-success: #22c55e;
  --color-warning: #eab308;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  --status-completed: #22c55e;
  --status-in-progress: #eab308;
  --status-planning: #3b82f6;
  --status-on-hold: #a1a1aa;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;

  --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;

  --container: 1120px;
  --navbar-h: 64px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,.5);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.6);
  --shadow-glow: 0 0 40px rgba(99,102,241,.08);

  --transition-fast: 150ms ease;
  --transition: 200ms ease;
  --transition-slow: 400ms ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-hover); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-text); }
h1 { font-size: 2.75rem; letter-spacing: -0.03em; }
h2 { font-size: 2rem; letter-spacing: -0.02em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.15rem; }
code { font-family: var(--font-mono); }
::selection { background: var(--color-primary); color: white; }

/* ---------- Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.section {
  padding: var(--space-20) 0;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section-title {
  font-size: 1.75rem;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.section-title::before {
  content: "";
  width: 4px;
  height: 1.5em;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}
.section-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-10);
  max-width: 600px;
}
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-center { text-align: center; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 0 20px rgba(99,102,241,.2);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: white;
  box-shadow: 0 0 30px rgba(99,102,241,.3);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-hover);
  background: var(--color-primary-subtle);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  color: var(--color-text);
  background: var(--color-surface);
}
.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
}
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition);
}
.btn-icon:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-hover);
  background: var(--color-primary-subtle);
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-h);
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background var(--transition);
}
.navbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.navbar-brand span {
  color: var(--color-primary);
}
.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.navbar-links a {
  color: var(--color-text-secondary);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all var(--transition);
}
.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-text);
  background: var(--color-surface);
}
.navbar-links a.active {
  color: var(--color-primary-hover);
}
.navbar-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--space-2);
}

/* Mobile menu */
@media (max-width: 768px) {
  .navbar-links {
    display: none;
    position: absolute;
    top: var(--navbar-h);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-1);
  }
  .navbar-links.open {
    display: flex;
  }
  .navbar-links a {
    width: 100%;
    padding: var(--space-3) var(--space-4);
  }
  .navbar-toggle {
    display: block;
  }
}

/* ---------- Hero Section ---------- */
.hero {
  padding: calc(var(--navbar-h) + var(--space-20)) 0 var(--space-20);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse, rgba(99,102,241,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  right: -20%;
  width: 50%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(6,182,212,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-primary-hover);
  background: var(--color-primary-subtle);
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(99,102,241,0.15);
  margin-bottom: var(--space-6);
  font-weight: 500;
}
.hero-label .dot {
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--color-text), var(--color-text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ---------- Stats Row ---------- */
.stats-row {
  display: flex;
  gap: var(--space-10);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}
.stat-item {
  display: flex;
  flex-direction: column;
}
.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---------- Project Cards ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-6);
}
.project-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-slow);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  color: inherit;
}
.project-card-thumb {
  width: 100%;
  height: 200px;
  background: var(--color-surface);
  position: relative;
  overflow: hidden;
}
.project-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.project-card:hover .project-card-thumb img {
  transform: scale(1.05);
}
.project-card-thumb .placeholder-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--color-text-muted);
  font-size: 2rem;
}
.project-card-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.project-card-title {
  font-size: 1.1rem;
  font-weight: 600;
}
.project-card-summary {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}
.project-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

/* ---------- Badges / Tags ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-tag {
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.badge-status {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  gap: var(--space-1);
}
.badge-status .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
}
.badge-status.completed .dot { background: var(--status-completed); }
.badge-status.in-progress .dot { background: var(--status-in-progress); }
.badge-status.planning .dot { background: var(--status-planning); }
.badge-status.on-hold .dot { background: var(--status-on-hold); }
.badge-status.completed { color: var(--status-completed); background: rgba(34,197,94,0.08); }
.badge-status.in-progress { color: var(--status-in-progress); background: rgba(234,179,8,0.08); }
.badge-status.planning { color: var(--status-planning); background: rgba(59,130,246,0.08); }
.badge-status.on-hold { color: var(--status-on-hold); background: rgba(161,161,170,0.08); }

/* ---------- Category Filter ---------- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}
.filter-bar .search-input {
  flex: 1;
  min-width: 220px;
  max-width: 360px;
  padding: 0.55rem 1rem 0.55rem 2.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.88rem;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2371717a' viewBox='0 0 24 24'%3E%3Cpath d='M21 21l-4.35-4.35M11 19a8 8 0 100-16 8 8 0 000 16z' stroke='%2371717a' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 0.75rem center;
}
.filter-bar .search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}
.filter-bar .search-input::placeholder {
  color: var(--color-text-muted);
}
.filter-pills {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.filter-pill {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}
.filter-pill:hover {
  border-color: var(--color-border-light);
  color: var(--color-text);
}
.filter-pill.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* ---------- Skills Grid ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-6);
}
.skill-group {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.skill-group-title {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  font-weight: 600;
}
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.skill-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.8rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  transition: all var(--transition);
}
.skill-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-hover);
  background: var(--color-primary-subtle);
}

/* ---------- Project Detail ---------- */
.project-detail {
  padding-top: calc(var(--navbar-h) + var(--space-10));
  padding-bottom: var(--space-16);
}
.project-detail-header {
  margin-bottom: var(--space-10);
}
.project-detail-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-bottom: var(--space-6);
  transition: color var(--transition);
}
.project-detail-back:hover {
  color: var(--color-primary-hover);
}
.project-detail-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: var(--space-4);
}
.project-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  margin-bottom: var(--space-4);
}
.project-detail-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}
.project-detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.project-detail-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.project-detail-cover {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
}

/* Markdown Content Styles */
.markdown-content {
  max-width: 780px;
  line-height: 1.8;
}
.markdown-content h1 { font-size: 2rem; margin: var(--space-10) 0 var(--space-4); }
.markdown-content h2 { font-size: 1.5rem; margin: var(--space-8) 0 var(--space-3); }
.markdown-content h3 { font-size: 1.2rem; margin: var(--space-6) 0 var(--space-3); }
.markdown-content p { margin-bottom: var(--space-4); color: var(--color-text-secondary); }
.markdown-content strong { color: var(--color-text); font-weight: 600; }
.markdown-content a { color: var(--color-primary-hover); text-decoration: underline; text-underline-offset: 2px; }
.markdown-content ul, .markdown-content ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}
.markdown-content ul { list-style: disc; }
.markdown-content ol { list-style: decimal; }
.markdown-content li { margin-bottom: var(--space-2); color: var(--color-text-secondary); }
.markdown-content img {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
  margin: var(--space-8) 0;
}
.video-item {
  display: flex;
  flex-direction: column;
}
.video-item video {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.video-caption {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-2);
}
.markdown-content code {
  background: var(--color-surface);
  color: var(--color-accent);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  font-size: 0.88em;
}
.markdown-content pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}
.markdown-content pre code {
  background: transparent;
  padding: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}
.markdown-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: var(--space-3) var(--space-5);
  margin-bottom: var(--space-4);
  background: var(--color-primary-subtle);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-secondary);
}
.markdown-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}
.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-4);
}
.markdown-content th, .markdown-content td {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  text-align: left;
}
.markdown-content th {
  background: var(--color-surface);
  font-weight: 600;
  color: var(--color-text);
}

/* ---------- Contact Page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
}
.contact-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: all var(--transition);
}
.contact-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.contact-card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-subtle);
  border: 1px solid rgba(99,102,241,0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-hover);
  flex-shrink: 0;
}
.contact-card-info h3 {
  font-size: 1rem;
  margin-bottom: var(--space-1);
}
.contact-card-info p {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}

/* ---------- Editor Page ---------- */
.editor-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  min-height: 70vh;
}
@media (max-width: 900px) {
  .editor-layout {
    grid-template-columns: 1fr;
  }
}
.editor-panel {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.editor-panel-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.editor-panel-body {
  flex: 1;
  padding: var(--space-5);
  overflow-y: auto;
}

/* Form Controls */
.form-group {
  margin-bottom: var(--space-5);
}
.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.55rem 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.88rem;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}
.form-textarea {
  min-height: 300px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  resize: vertical;
}
.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2371717a' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}
.form-hint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}

/* Output Box */
.code-output {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  overflow-x: auto;
  white-space: pre-wrap;
  max-height: 500px;
  overflow-y: auto;
}
.code-output .copy-btn {
  float: right;
  margin-left: var(--space-3);
}

/* Drag-drop zone */
.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  color: var(--color-text-muted);
  background: var(--color-surface);
  transition: all var(--transition);
  cursor: pointer;
}
.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--color-primary);
  color: var(--color-primary-hover);
  background: var(--color-primary-subtle);
}
.drop-zone-icon {
  font-size: 2rem;
  margin-bottom: var(--space-3);
}
.drop-zone-text {
  font-size: 0.9rem;
  font-weight: 500;
}
.drop-zone-hint {
  font-size: 0.78rem;
  margin-top: var(--space-2);
}
.image-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.image-preview-item {
  position: relative;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  aspect-ratio: 1;
}
.image-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.image-preview-item .filename {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.8);
  color: var(--color-text);
  font-size: 0.68rem;
  padding: var(--space-1) var(--space-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.image-preview-item .remove-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(239,68,68,0.9);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.82rem;
}
.footer a {
  color: var(--color-text-secondary);
}
.footer a:hover {
  color: var(--color-primary-hover);
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
}

/* ---------- Empty State ---------- */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-6);
  color: var(--color-text-muted);
}
.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}
.empty-state p {
  font-size: 0.95rem;
}

/* ---------- Page Header ---------- */
.page-header {
  padding: calc(var(--navbar-h) + var(--space-12)) 0 var(--space-10);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
}
.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: var(--space-2);
}
.page-header p {
  color: var(--color-text-secondary);
  font-size: 1rem;
  max-width: 600px;
}

/* ---------- Animations ---------- */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp 0.5s ease both;
}
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .section { padding: var(--space-12) 0; }
  .hero { padding-top: calc(var(--navbar-h) + var(--space-12)); }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .stats-row {
    gap: var(--space-6);
    flex-wrap: wrap;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    text-align: center;
    justify-content: center;
  }
  .page-header {
    padding-top: calc(var(--navbar-h) + var(--space-8));
  }
}
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-bar .search-input {
    max-width: 100%;
  }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-light);
}

/* ---------- Markdown Toolbar ---------- */
.md-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.md-toolbar button {
  padding: 0.3rem 0.55rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  transition: all var(--transition-fast);
}
.md-toolbar button:hover {
  background: var(--color-card);
  border-color: var(--color-border);
  color: var(--color-text);
}
.md-toolbar .separator {
  width: 1px;
  background: var(--color-border);
  margin: 2px var(--space-1);
}
.form-textarea.with-toolbar {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

/* ---------- Toast / Notification ---------- */
.toast {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  color: var(--color-text);
  font-size: 0.88rem;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  animation: fadeInUp 0.3s ease;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.toast.success { border-color: var(--status-completed); }
.toast.error { border-color: var(--color-error); }