/* ============================================================
   PORTFOLIO v2 — MINIMAL TECHNO THEME
   Dark/Light toggle · Geometric · Clean · Tech-forward
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Light theme (default) */
  --bg-base: #f0f0f5;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f5f5fa;
  --bg-nav: rgba(240, 240, 245, 0.88);
  --bg-input: #f0f0f5;

  --text-primary: #111118;
  --text-secondary: #555570;
  --text-muted: #8888a0;
  --text-inverse: #f0f0f5;

  --accent: #0099cc;
  --accent-dim: rgba(0, 153, 204, 0.1);
  --accent-glow: rgba(0, 153, 204, 0.25);
  --accent-hover: #00aadd;
  --secondary: #cc2952;
  --secondary-dim: rgba(204, 41, 82, 0.1);
  --success: #00aa55;
  --warning: #cc8800;

  --border: rgba(0, 0, 0, 0.08);
  --border-accent: rgba(0, 153, 204, 0.25);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.1);
  --shadow-glow: 0 0 20px rgba(0, 153, 204, 0.1);

  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 4px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --grid-dot: rgba(0, 0, 0, 0.04);
  color-scheme: light;
}

/* Dark theme */
body.dark-theme {
  --bg-base: #0a0a0f;
  --bg-surface: #111118;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --bg-nav: rgba(10, 10, 15, 0.88);
  --bg-input: #111118;

  --text-primary: #e8e8f0;
  --text-secondary: #8888a8;
  --text-muted: #555570;
  --text-inverse: #0a0a0f;

  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.15);
  --accent-glow: rgba(0, 212, 255, 0.4);
  --accent-hover: #33dfff;
  --secondary: #ff3366;
  --secondary-dim: rgba(255, 51, 102, 0.15);
  --success: #00ff88;
  --warning: #ffaa00;

  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(0, 212, 255, 0.2);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
  --grid-dot: rgba(0, 212, 255, 0.06);
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: var(--font-body); }

/* ---------- Dot Grid Background ---------- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, var(--grid-dot) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
  z-index: 0;
}

/* ---------- Layout ---------- */
.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.section { padding: 100px 0; position: relative; }
.section-alt { background: var(--bg-surface); }

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

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 500px;
  margin: 0 auto;
}

/* ---------- Navigation ---------- */
#navbar {
  position: fixed;
  top: 0; left: 0; width: 100%;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}

#navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
}

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

.nav-links {
  display: flex;
  gap: 0.3rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  letter-spacing: 0.5px;
}

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

.nav-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  width: 38px; height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
  color: var(--text-primary);
}

.btn-icon:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}

.icon-sun { display: none; }
body.dark-theme .icon-sun { display: inline; }
body.dark-theme .icon-moon { display: none; }

.mobile-only { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.88rem;
  font-family: var(--font-heading);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  letter-spacing: 0.3px;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--border-accent);
}
.btn-outline:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-sm { padding: 7px 16px; font-size: 0.8rem; }
.btn-xs { padding: 5px 12px; font-size: 0.75rem; }
.btn-danger { background: var(--secondary); color: #fff; border-color: var(--secondary); }
.btn-danger:hover { opacity: 0.85; }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 10%;
  right: -5%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--secondary-dim) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}

.hero-text {
  flex: 1;
}

.hero-photo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-status {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 6px 16px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 20px;
  margin-bottom: 1.5rem;
}

.status-dot {
  width: 6px; height: 6px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.05;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero-tagline .hl { color: var(--secondary); }

.hero-desc {
  max-width: 520px;
  color: var(--text-secondary);
  font-size: 1.02rem;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.card:hover::before { opacity: 1; }

.card-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ---------- Page Header ---------- */
.page-header {
  padding: 140px 0 60px;
  text-align: center;
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 30%; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(60px);
}

.page-header-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.page-header-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 500px;
  margin: 0 auto;
}

/* ---------- Grids ---------- */
.tools-grid, .fun-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ---------- Project Card ---------- */
.project-card { display: flex; flex-direction: column; }

.project-img {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 1rem;
  position: relative;
}

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

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

.project-img-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-surface) 0%, var(--accent-dim) 100%);
  border: 1px dashed var(--border-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--text-muted);
  transition: all var(--transition);
}

.project-card:hover .project-img-placeholder {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent-dim) 0%, var(--bg-surface) 100%);
}

.project-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 0.75rem;
  width: fit-content;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.project-badge.finished { background: rgba(0,255,136,0.1); color: var(--success); border: 1px solid rgba(0,255,136,0.2); }
.project-badge.ongoing { background: rgba(255,170,0,0.1); color: var(--warning); border: 1px solid rgba(255,170,0,0.2); }
.project-badge.tool { background: var(--accent-dim); color: var(--accent); border: 1px solid var(--border-accent); }

.project-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  flex: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}

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

/* ---------- About ---------- */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-photo {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.profile-img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-accent);
  box-shadow: 0 0 30px var(--accent-glow), var(--shadow-md);
  transition: all 0.4s ease;
}

.profile-img:hover {
  transform: scale(1.05);
  box-shadow: 0 0 50px var(--accent-glow), var(--shadow-lg);
  border-color: var(--accent);
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1rem;
}

.about-text strong { color: var(--text-primary); }

.terminal-block {
  font-family: var(--font-mono);
  background: var(--bg-surface);
  padding: 1.2rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.terminal-block .prompt { color: var(--accent); font-weight: 600; }

.skills-section h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 6px 14px;
  border-radius: var(--radius-xs);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  color: var(--text-primary);
  transition: all var(--transition);
}

.skill-tag:hover {
  background: var(--accent);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stat-box::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--secondary));
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 0.3rem;
}

/* ---------- Tool Components ---------- */
.clock-display {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  color: var(--accent);
  margin: 0.5rem 0;
  text-shadow: 0 0 20px var(--accent-glow);
}

.clock-date {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.world-clock-list {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.world-clock-item {
  display: flex;
  justify-content: space-between;
  padding: 6px 10px;
  background: var(--bg-surface);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.world-clock-item .wc-city { color: var(--text-secondary); }
.world-clock-item .wc-time { color: var(--accent); font-weight: 600; }

.pomo-display {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  color: var(--accent);
  margin: 0.5rem 0 1rem;
  text-shadow: 0 0 20px var(--accent-glow);
}

.pomo-controls {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.pomo-stats {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.pomo-stats .stat-num { color: var(--accent); font-weight: 600; }

/* Notes */
.notes-textarea {
  width: 100%;
  min-height: 100px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--bg-input);
  color: var(--text-primary);
  transition: border var(--transition), background var(--transition);
}

.notes-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.notes-controls { display: flex; gap: 0.5rem; margin-top: 0.75rem; }
.notes-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-top: 0.4rem;
  min-height: 1.2em;
}

/* Todo */
.todo-input-group { display: flex; gap: 0.5rem; margin-bottom: 1rem; }

.todo-input, .input-field {
  flex: 1;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--bg-input);
  color: var(--text-primary);
  transition: border var(--transition);
}

.todo-input:focus, .input-field:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.todo-list { max-height: 220px; overflow-y: auto; }

.todo-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 0.4rem;
  background: var(--bg-surface);
  transition: background var(--transition);
  font-size: 0.88rem;
}

.todo-item:hover { background: var(--accent-dim); }
.todo-item.completed .todo-text { text-decoration: line-through; color: var(--text-muted); }
.todo-text { flex: 1; cursor: pointer; }

.todo-delete {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
  padding: 2px 6px;
  border-radius: 4px;
}

.todo-delete:hover { color: var(--secondary); }

/* Weather */
.weather-display {
  text-align: center;
  padding: 1rem 0;
}

.weather-temp {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
}

.weather-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.3rem;
  text-transform: capitalize;
}

.weather-details {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Quotes */
.quote-text {
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent);
  padding: 0.8rem 1.2rem;
  margin-bottom: 0.5rem;
  min-height: 70px;
  display: flex;
  align-items: center;
}

.quote-author {
  text-align: right;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  margin-bottom: 1rem;
}

.quote-actions { display: flex; gap: 0.5rem; }

/* Clicker */
.clicker-score {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin: 1rem 0;
  color: var(--accent);
  text-shadow: 0 0 15px var(--accent-glow);
}

.clicker-btn {
  display: block;
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.clicker-btn:active { transform: scale(0.96) !important; }

/* Typing Test */
.typing-area {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  line-height: 1.8;
  min-height: 80px;
  margin-bottom: 1rem;
}

.typing-area .correct { color: var(--success); }
.typing-area .incorrect { color: var(--secondary); text-decoration: underline; }
.typing-area .pending { color: var(--text-muted); }
.typing-area .current { background: var(--accent-dim); border-bottom: 2px solid var(--accent); }

.typing-input {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.typing-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.typing-stats {
  display: flex;
  justify-content: space-around;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.typing-stats .stat-num { color: var(--accent); font-weight: 600; font-size: 1.2rem; display: block; }

/* Reaction Test */
.reaction-box {
  width: 100%;
  min-height: 150px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  margin-bottom: 1rem;
  user-select: none;
}

.reaction-box.waiting { background: var(--secondary-dim); color: var(--secondary); border: 1px solid var(--secondary); }
.reaction-box.ready { background: rgba(0,255,136,0.15); color: var(--success); border: 1px solid var(--success); }
.reaction-box.result { background: var(--accent-dim); color: var(--accent); border: 1px solid var(--accent); }

.reaction-best {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: center;
  color: var(--text-muted);
}

/* Quiz */
.quiz-question {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  min-height: 2.5em;
}

.quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.quiz-option {
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  cursor: pointer;
  font-size: 0.88rem;
  transition: all var(--transition);
  text-align: center;
}

.quiz-option:hover { border-color: var(--accent); background: var(--accent-dim); }
.quiz-option.correct { border-color: var(--success); background: rgba(0,255,136,0.1); color: var(--success); }
.quiz-option.wrong { border-color: var(--secondary); background: var(--secondary-dim); color: var(--secondary); }
.quiz-option.disabled { pointer-events: none; opacity: 0.7; }

.quiz-score {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
}

/* Random Facts */
.fact-text {
  font-size: 1rem;
  color: var(--text-secondary);
  padding: 1rem;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--secondary);
  min-height: 80px;
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

/* Habit Tracker */
.habit-list { display: flex; flex-direction: column; gap: 0.5rem; }

.habit-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 8px 12px;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}

.habit-check {
  width: 20px; height: 20px;
  border: 2px solid var(--border-accent);
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}

.habit-check.done {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-inverse);
}

.habit-streak {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
}

/* ---------- Useful Websites ---------- */
.websites-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.website-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

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

.website-icon {
  font-size: 1.5rem;
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.website-info { flex: 1; min-width: 0; }
.website-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 2px;
}

.website-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- Anonymous Message ---------- */
.anon-form { max-width: 500px; margin: 0 auto; }

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.form-group textarea {
  width: 100%;
  min-height: 120px;
  resize: vertical;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: border var(--transition);
}

.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-success {
  text-align: center;
  padding: 2rem;
  font-family: var(--font-mono);
  color: var(--success);
}

/* ---------- Resume Section ---------- */
.resume-section {
  text-align: center;
  padding: 2rem;
}

.resume-btn {
  font-size: 1rem;
  padding: 14px 32px;
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 600;
}

.footer-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

/* ---------- AI Chatbot ---------- */
.chat-widget {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
}

.chat-toggle {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  border: none;
  transition: all var(--transition);
}

.chat-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow);
}

.chat-window {
  position: absolute;
  bottom: 70px;
  right: 0;
  width: 320px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: all var(--transition);
  max-height: 400px;
}

.chat-window.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.chat-header {
  padding: 1rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-heading);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
}

.chat-close:hover {
  color: var(--secondary);
}

.chat-body {
  padding: 1rem;
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  min-height: 250px;
}

.chat-message {
  max-width: 85%;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  line-height: 1.4;
}

.chat-message.bot {
  background: var(--bg-card);
  color: var(--text-primary);
  align-self: flex-start;
  border-bottom-left-radius: 2px;
}

.chat-message.user {
  background: var(--accent);
  color: var(--text-inverse);
  align-self: flex-end;
  border-bottom-right-radius: 2px;
}

.chat-input-area {
  padding: 0.8rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 0.5rem;
}

.chat-input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.8rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.chat-input:focus {
  outline: none;
  border-color: var(--accent);
}

.chat-send {
  background: var(--accent);
  color: var(--text-inverse);
  border: none;
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.chat-send:hover {
  background: var(--accent-hover);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

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

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

/* ---------- Certifications ---------- */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.cert-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem;
}

.cert-img {
  width: 100%;
  height: 200px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 1.2rem;
}

.cert-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
  transition: transform 0.4s ease;
}

.cert-card:hover .cert-img img {
  transform: scale(1.03);
}

.cert-img-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-surface) 0%, var(--accent-dim) 100%);
  border: 1px dashed var(--border-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--text-muted);
  transition: all var(--transition);
}

.cert-card:hover .cert-img-placeholder {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent-dim) 0%, var(--bg-surface) 100%);
}

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .tools-grid, .fun-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .about-content { grid-template-columns: 1fr; }
  .about-photo { justify-content: center; }
  .certs-grid { grid-template-columns: 1fr 1fr; }
  .stat-grid { grid-template-columns: repeat(3, 1fr); }
  .quiz-options { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 70px 0; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; width: 100%;
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    gap: 0;
    text-align: center;
  }

  .nav-links.open { display: flex; }
  .nav-links li a { display: block; padding: 12px 0; }
  .mobile-only { display: flex; }
  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .hero-content { flex-direction: column; text-align: center; }
  .hero-cta { justify-content: center; }
  .hero-photo { order: -1; }
  .hero-name { font-size: 2.5rem; }
  .profile-img { width: 160px; height: 160px; }
  .clock-display { font-size: 1.8rem; }
  .pomo-display { font-size: 2.2rem; }
  .stat-grid { grid-template-columns: 1fr; }
  .websites-grid { grid-template-columns: 1fr; }
}