/* ===== RESET & VARIABLES ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Dark theme (default) */
  --bg: #080c18;
  --bg-alt: #0d1225;
  --surface: rgba(255,255,255,0.04);
  --surface-hover: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(79,142,247,0.4);

  --primary: #4f8ef7;
  --primary-dark: #3a77e0;
  --accent: #a855f7;
  --accent2: #06d6a0;
  --danger: #ef4444;

  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.6);

  --font: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --nav-h: 68px;
  --transition: 0.25s ease;

  /* Theme-specific tokens */
  --nav-bg: rgba(8,12,24,0.88);
  --input-bg: rgba(255,255,255,0.03);
  --code-bg: rgba(255,255,255,0.06);
  --orb-opacity: 0.12;
  --chat-panel-bg: #0d1225;
}

[data-theme="light"] {
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --surface: rgba(0,0,0,0.04);
  --surface-hover: rgba(0,0,0,0.07);
  --border: rgba(0,0,0,0.1);
  --border-hover: rgba(79,142,247,0.5);

  --primary: #3a77e0;
  --primary-dark: #2563eb;
  --accent: #9333ea;
  --accent2: #059669;
  --danger: #dc2626;

  --text: #1e293b;
  --text-muted: #475569;
  --text-dim: #94a3b8;

  --shadow: 0 4px 24px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.15);

  --nav-bg: rgba(248,250,252,0.92);
  --input-bg: rgba(0,0,0,0.03);
  --code-bg: rgba(0,0,0,0.06);
  --orb-opacity: 0.07;
  --chat-panel-bg: #f1f5f9;
}

html { scroll-behavior: smooth; }

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

::selection { background: rgba(79,142,247,0.3); }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ===== UTILITY ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.accent { color: var(--primary); }
a { color: var(--primary); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.8; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(12px);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: var(--font);
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,142,247,0.4); opacity: 1; }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: rgba(79,142,247,0.1); opacity: 1; }
.btn-full { width: 100%; justify-content: center; }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
.navbar.scrolled { border-color: var(--border); }

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--text);
  letter-spacing: 1px;
  text-decoration: none;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
  text-decoration: none;
}
.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: var(--surface);
  opacity: 1;
}
.nav-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 4px 12px;
  white-space: nowrap;
}
.badge-dot {
  width: 7px; height: 7px;
  background: var(--accent2);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 1rem;
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--primary);
  background: rgba(79,142,247,0.1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: calc(var(--nav-h) + 40px) 24px 80px;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}
.orb-1 {
  width: 600px; height: 600px;
  background: var(--primary);
  top: -200px; left: -100px;
  animation: float 8s ease-in-out infinite;
  opacity: var(--orb-opacity);
}
.orb-2 {
  width: 400px; height: 400px;
  background: var(--accent);
  bottom: -100px; right: -50px;
  animation: float 10s ease-in-out infinite reverse;
  opacity: var(--orb-opacity);
}
.orb-3 {
  width: 300px; height: 300px;
  background: var(--accent2);
  top: 40%; left: 60%;
  animation: float 12s ease-in-out infinite 2s;
  opacity: var(--orb-opacity);
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(3deg); }
}

.hero-content { position: relative; z-index: 1; max-width: 760px; }
.hero-avatar { margin-bottom: 32px; }
.avatar-ring {
  width: 110px; height: 110px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  padding: 3px;
  margin: 0 auto;
  animation: spin-ring 8s linear infinite;
}
@keyframes spin-ring {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.avatar-initials {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 2px;
  animation: spin-ring 8s linear infinite reverse;
}
.hero-greeting {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 8px;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.1;
}
.hero-typewriter {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 20px;
  min-height: 1.8em;
}
.cursor { animation: blink 1s step-end infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.hero-tagline {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 1rem;
}
.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}
.social-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 50px;
  transition: all var(--transition);
  text-decoration: none;
}
.social-link svg { width: 16px; height: 16px; }
.social-link:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(79,142,247,0.08);
  opacity: 1;
}
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg);
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(6px); }
}

/* ===== SECTION ===== */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--primary);
  letter-spacing: 3px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
}
.section-subtitle { color: var(--text-muted); font-size: 1rem; }

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}
.about-text p { color: var(--text-muted); margin-bottom: 20px; font-size: 1.05rem; }
.about-text strong { color: var(--text); }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.tag {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 6px 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}
.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* ===== TIMELINE ===== */
.timeline { position: relative; display: flex; flex-direction: column; gap: 32px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent), transparent);
}
.timeline-item { display: flex; gap: 28px; padding-left: 8px; }
.timeline-dot {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: 3px solid var(--bg-alt);
  flex-shrink: 0;
  margin-top: 8px;
  position: relative;
  z-index: 1;
}
.timeline-card { flex: 1; }
.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.timeline-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  display: inline-block;
}
.badge-alt { background: rgba(79,142,247,0.15); color: var(--primary); }
.badge-blue { background: rgba(6,214,160,0.15); color: var(--accent2); }
.badge-purple { background: rgba(168,85,247,0.15); color: var(--accent); }
.badge-inline {
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: 50px;
  background: rgba(79,142,247,0.15);
  color: var(--primary);
  font-weight: 600;
  vertical-align: middle;
  margin-left: 8px;
}
.timeline-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 4px; }
.timeline-company { color: var(--text-muted); font-size: 0.9rem; }
.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
}
.timeline-highlights { color: var(--text-muted); padding-left: 20px; margin-bottom: 16px; }
.timeline-highlights li { margin-bottom: 6px; font-size: 0.95rem; }
.tech-stack { display: flex; flex-wrap: wrap; gap: 6px; }
.tech-tag {
  background: rgba(79,142,247,0.08);
  border: 1px solid rgba(79,142,247,0.2);
  color: var(--primary);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 50px;
  font-family: var(--font-mono);
}

/* ===== SKILLS ===== */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.skill-category { }
.skill-category-full { grid-column: 1 / -1; }
.skill-cat-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.skill-cat-header h3 { font-size: 1rem; font-weight: 700; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-cat-desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.skill-pill {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 5px 13px;
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: all var(--transition);
}
.skill-pill:hover { border-color: var(--border-hover); color: var(--text); }
.skill-pill.skill-primary {
  border-color: rgba(79,142,247,0.25);
  color: var(--primary);
  background: rgba(79,142,247,0.05);
}

/* ===== EDUCATION ===== */
.edu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 48px; }
.edu-card { display: flex; align-items: flex-start; gap: 20px; }
.edu-icon { font-size: 2rem; flex-shrink: 0; }
.edu-info h3 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.edu-school { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 8px; }
.edu-period {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--primary);
  background: rgba(79,142,247,0.08);
  padding: 3px 10px;
  border-radius: 50px;
  display: inline-block;
}
.languages-section { }
.lang-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; text-align: center; }
.lang-cards { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.lang-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 32px;
  min-width: 150px;
}
.lang-flag { font-size: 2.5rem; }
.lang-name { font-weight: 700; }
.lang-level { color: var(--text-muted); font-size: 0.85rem; }

/* ===== REVIEWS ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}
.reviews-loading { grid-column: 1/-1; text-align: center; padding: 40px; color: var(--text-muted); }
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.no-reviews { grid-column: 1/-1; text-align: center; padding: 40px; color: var(--text-muted); }

.review-card { position: relative; }
.review-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.reviewer-info {}
.reviewer-name { font-weight: 700; }
.reviewer-meta { font-size: 0.82rem; color: var(--text-muted); }
.review-stars { color: #fbbf24; font-size: 1.1rem; letter-spacing: 1px; }
.review-comment { color: var(--text-muted); font-size: 0.95rem; font-style: italic; margin-bottom: 12px; }
.review-date { font-size: 0.78rem; color: var(--text-dim); font-family: var(--font-mono); }

.review-form-container { max-width: 720px; margin: 0 auto; }
.form-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 24px; }
.review-form, .contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 0.88rem; font-weight: 600; color: var(--text-muted); }
.form-group input,
.form-group textarea {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--primary); }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }

.star-rating { display: flex; gap: 4px; }
.star {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--border);
  cursor: pointer;
  transition: color var(--transition), transform var(--transition);
  padding: 0 2px;
  line-height: 1;
}
.star.active, .star:hover { color: #fbbf24; }
.star:hover { transform: scale(1.15); }
.form-notice { font-size: 0.88rem; margin-top: 4px; min-height: 20px; }
.form-notice.success { color: var(--accent2); }
.form-notice.error { color: var(--danger); }

/* ===== CONTACT ===== */
.contact-layout { display: grid; grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; gap: 32px; align-items: start; }
.contact-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 20px; }
.contact-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.contact-list li { display: flex; align-items: center; gap: 14px; }
.contact-icon { font-size: 1.1rem; width: 20px; text-align: center; }
.contact-list a { color: var(--text-muted); font-size: 0.9rem; transition: color var(--transition); }
.contact-list a:hover { color: var(--primary); opacity: 1; }
.contact-list span { color: var(--text-muted); font-size: 0.9rem; }
.contact-availability {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
}
.avail-dot {
  width: 12px; height: 12px;
  background: var(--accent2);
  border-radius: 50%;
  flex-shrink: 0;
  animation: pulse 2s infinite;
  box-shadow: 0 0 0 0 rgba(6,214,160,0.4);
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(6,214,160,0.4); }
  70% { box-shadow: 0 0 0 8px rgba(6,214,160,0); }
  100% { box-shadow: 0 0 0 0 rgba(6,214,160,0); }
}
.contact-availability strong { display: block; margin-bottom: 2px; }
.contact-availability p { color: var(--text-muted); font-size: 0.88rem; }
.contact-notice { margin-top: 4px; font-size: 0.88rem; min-height: 20px; }
.contact-notice.success { color: var(--accent2); }
.contact-notice.error { color: var(--danger); }

.thread-viewer { max-width: 720px; margin: 32px auto 0; }
.thread-viewer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.thread-viewer-header h3 { font-size: 1.1rem; font-weight: 700; }
.thread-close-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 28px; height: 28px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.thread-close-btn:hover { border-color: var(--danger); color: var(--danger); }
.thread-messages { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.thread-msg {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
}
.thread-msg.owner { border-color: rgba(79,142,247,0.3); background: rgba(79,142,247,0.05); }
.thread-msg-name { font-weight: 600; font-size: 0.85rem; margin-bottom: 6px; color: var(--primary); }
.thread-msg-content { color: var(--text-muted); font-size: 0.9rem; white-space: pre-wrap; }
.thread-session { color: var(--text-dim); font-size: 0.85rem; margin-bottom: 24px; }
.thread-session code {
  background: var(--surface);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.thread-reply-area { border-top: 1px solid var(--border); padding-top: 20px; }
.thread-reply-actions { display: flex; align-items: center; gap: 16px; margin-top: 12px; flex-wrap: wrap; }

.session-recovery { max-width: 720px; margin: 20px auto 0; }
.session-recovery-desc { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; }
.session-recovery-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.session-recovery-actions input {
  flex: 1;
  min-width: 200px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition);
}
.session-recovery-actions input:focus { border-color: var(--primary); }
.session-recovery-actions input::placeholder { color: var(--text-dim); }

/* ===== PROJECTS ===== */
.projects-carousel { position: relative; display: flex; align-items: center; gap: 16px; }
.projects-carousel-wide { max-width: 1600px; margin: 0 auto; padding: 0 32px; }

.projects-grid {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding-bottom: 4px;
  flex: 1 1 auto;
  min-width: 0;
  scrollbar-width: none;
}
.projects-grid::-webkit-scrollbar { display: none; }

.project-card {
  padding: 0;
  overflow: hidden;
  flex: 0 0 calc((100% - 48px) / 3);
  scroll-snap-align: start;
}

.projects-nav-btn {
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--primary);
  font-size: 1.7rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  transition: border-color var(--transition), color var(--transition), transform var(--transition), background var(--transition);
}
.projects-nav-btn:hover { border-color: var(--primary); background: rgba(79,142,247,0.1); transform: scale(1.06); }
.projects-nav-btn:disabled { opacity: 0.3; cursor: default; pointer-events: none; transform: none; }

.projects-dots { display: flex; justify-content: center; gap: 10px; margin-top: 22px; }
.projects-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: var(--border);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.projects-dot:hover { background: var(--border-hover); }
.projects-dot.active { background: var(--primary); transform: scale(1.35); }

.project-intro {
  position: relative;
  max-height: 105px;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.project-intro::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 32px;
  background: linear-gradient(transparent, var(--surface));
}
.project-intro.expanded { max-height: 1200px; }
.project-intro.expanded::after { display: none; }
.project-intro.no-truncate::after { display: none; }

.project-more-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  margin: 8px 0 14px;
  display: block;
}
.project-more-btn:hover { text-decoration: underline; }
.project-more-btn.hidden { display: none; }

@media (max-width: 900px) {
  .project-card { flex-basis: calc((100% - 24px) / 2); }
}

@media (max-width: 600px) {
  .project-card { flex-basis: 85vw; }
}

.project-media {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  cursor: default;
  background: linear-gradient(135deg, rgba(79,142,247,0.12), rgba(168,85,247,0.12));
}
.project-media[data-youtube] { cursor: pointer; }

.project-video-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 10px;
}
.project-placeholder-icon { font-size: 2.8rem; opacity: 0.45; }
.project-placeholder-text {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.project-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.project-media video { width: 100%; height: 100%; object-fit: contain; display: block; background: #000; }

.project-play-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: opacity var(--transition);
}
.project-media[data-youtube]:hover .project-play-overlay { opacity: 1; }
.play-btn {
  width: 58px; height: 58px;
  border-radius: 50%;
  background: rgba(255,255,255,0.92);
  color: #1e293b;
  font-size: 1.3rem;
  display: flex; align-items: center; justify-content: center;
  padding-left: 4px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  transition: transform var(--transition);
}
.project-media[data-youtube]:hover .play-btn { transform: scale(1.1); }

.project-body { padding: 20px 24px 24px; }
.project-badges { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.proj-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-llm    { background: rgba(79,142,247,0.15);  color: var(--primary); }
.badge-rag    { background: rgba(168,85,247,0.15);  color: var(--accent); }
.badge-sbert  { background: rgba(79,142,247,0.15);  color: var(--primary); }
.badge-faiss  { background: rgba(6,214,160,0.15);   color: var(--accent2); }
.badge-research { background: rgba(251,191,36,0.18); color: #d97706; }
.badge-nlp    { background: rgba(168,85,247,0.15);  color: var(--accent); }
.badge-xr     { background: rgba(6,214,160,0.15);   color: var(--accent2); }
.badge-cv-vision { background: rgba(239,68,68,0.15); color: #ef4444; }

.project-title { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.project-desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 14px; }
.project-list { font-size: 0.875rem; color: var(--text-muted); line-height: 1.65; margin: 0 0 14px 1.1em; padding: 0; }
.project-list li { margin-bottom: 4px; }

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.project-video-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
}
.project-video-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(79,142,247,0.06);
}
.project-collab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.project-collab:hover { color: var(--primary); opacity: 1; }
.collab-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  letter-spacing: 0.5px;
}

/* ===== VIDEO MODAL ===== */
.video-modal {
  position: fixed; inset: 0; z-index: 3000;
  display: flex; align-items: center; justify-content: center;
}
.video-modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(10px);
}
.video-modal-content {
  position: relative; z-index: 1;
  width: min(900px, 92vw);
  aspect-ratio: 16/9;
}
.video-modal-close {
  position: absolute; top: -44px; right: 0;
  background: none; border: none; color: #fff;
  font-size: 1.5rem; cursor: pointer; padding: 4px 10px;
  opacity: 0.7; transition: opacity var(--transition);
  font-family: var(--font);
}
.video-modal-close:hover { opacity: 1; }
#videoModalFrame { width: 100%; height: 100%; border-radius: var(--radius-sm); border: none; }


/* ===== FOOTER ===== */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
}
.footer p { color: var(--text-muted); font-size: 0.9rem; }
.footer-sub { color: var(--text-dim); font-size: 0.8rem; margin-top: 8px; }

/* ===== AI CHAT WIDGET ===== */
.chat-widget {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 2000;
}
.chat-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none;
  border-radius: 50px;
  padding: 14px 20px;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  font-family: var(--font);
  cursor: pointer;
  box-shadow: 0 8px 32px rgba(79,142,247,0.5);
  transition: all var(--transition);
  position: relative;
}
.chat-toggle:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(79,142,247,0.6); }
.chat-toggle-icon svg { width: 20px; height: 20px; }
.chat-badge {
  position: absolute;
  top: -4px; right: -4px;
  background: var(--danger);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  width: 18px; height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-panel {
  position: absolute;
  bottom: calc(100% + 16px);
  right: 0;
  width: 380px;
  max-height: 520px;
  background: var(--chat-panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.25s ease;
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(79,142,247,0.05);
}
.chat-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.8rem;
  color: #fff;
  flex-shrink: 0;
}
.chat-header-info { flex: 1; }
.chat-header-info strong { display: block; font-size: 0.95rem; }
.chat-status { font-size: 0.78rem; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.status-dot {
  width: 7px; height: 7px;
  background: var(--accent2);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.chat-message { display: flex; }
.chat-message.bot { justify-content: flex-start; }
.chat-message.user { justify-content: flex-end; }
.msg-bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 0.88rem;
  line-height: 1.55;
}
.chat-message.bot .msg-bubble {
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  color: var(--text);
}
.chat-message.user .msg-bubble {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-bottom-right-radius: 4px;
}
.msg-typing .msg-bubble { padding: 12px 18px; }
.typing-dots { display: flex; gap: 4px; }
.typing-dots span {
  width: 6px; height: 6px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: typing 1.2s ease-in-out infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
.typing-note { font-size: 0.72rem; color: var(--text-muted); margin: 6px 0 0; }
@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-6px); }
}
.chat-input-area {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}
#chatInput {
  flex: 1;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 10px 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition);
}
#chatInput:focus { border-color: var(--primary); }
#chatInput::placeholder { color: var(--text-dim); }
.chat-send {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.chat-send svg { width: 18px; height: 18px; }
.chat-send:hover { transform: scale(1.1); }
.chat-send:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ===== ANIMATIONS ===== */
[data-aos] { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-aos].visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .edu-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-badge { display: none; }
  .theme-toggle { width: 32px; height: 32px; font-size: 0.9rem; }
  .skills-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .chat-panel { width: calc(100vw - 32px); right: -12px; }
  .timeline::before { display: none; }
  .timeline-item { flex-direction: column; gap: 12px; }
  .timeline-dot { display: none; }
}