/* ===== CSS Variables ===== */
:root {
  --bg-primary: #0a0f1e;
  --bg-secondary: #0d1429;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --border-color: rgba(0, 212, 255, 0.15);
  --border-hover: rgba(0, 212, 255, 0.45);
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.12);
  --accent-secondary: #7c3aed;
  --text-primary: #e8edf5;
  --text-secondary: #8892a4;
  --text-muted: #4a5568;
  --sidebar-width: 260px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --radius-card: 16px;
  --radius-sm: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #ffffff;
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

/* ===== Canvas Background ===== */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 32px 20px;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.sidebar-logo-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.sidebar-logo-text span {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-top: 2px;
}

.nav-section-title {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 24px 0 10px 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 4px;
  border: 1px solid transparent;
}

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

.nav-item.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: var(--border-color);
}

.nav-item-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 12px;
}

.social-link {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.2);
}

/* ===== Main Content ===== */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  padding: 48px 48px 80px;
  position: relative;
  z-index: 1;
}

/* ===== Page Header ===== */
.page-header {
  margin-bottom: 48px;
}

.page-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.page-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 16px;
}

.page-title .highlight {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.8;
}

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 28px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

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

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title .icon {
  font-size: 20px;
}

.card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== Grid Layouts ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

/* ===== Section Divider ===== */
.section {
  margin-bottom: 48px;
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border-color), transparent);
}

/* ===== Hero Section (About) ===== */
.hero-section {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: start;
  margin-bottom: 56px;
}

.hero-text .greeting {
  font-size: 15px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.hero-text h1 {
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 12px;
}

.hero-text .role-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.role-tag {
  padding: 5px 14px;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 50px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
}

.role-tag.purple {
  background: rgba(124, 58, 237, 0.12);
  border-color: rgba(124, 58, 237, 0.25);
  color: #a78bfa;
}

.role-tag.green {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.25);
  color: #34d399;
}

.hero-text .bio {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
  max-width: 540px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0099cc);
  color: #000;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 212, 255, 0.45);
  color: #000;
}

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

.btn-outline:hover {
  background: var(--bg-card-hover);
  color: var(--accent);
  border-color: var(--accent);
}

.avatar-wrap {
  position: relative;
  flex-shrink: 0;
}

.avatar-ring {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  padding: 3px;
  animation: spin-slow 8s linear infinite;
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.avatar-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-primary);
}

.avatar-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.avatar-badge {
  position: absolute;
  bottom: 10px;
  right: -10px;
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 50px;
  border: 2px solid var(--bg-primary);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

/* ===== Stats Row ===== */
.stats-row {
  display: flex;
  gap: 0;
  margin-bottom: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  backdrop-filter: blur(10px);
  flex-wrap: wrap;
  overflow: hidden;
  position: relative;
}

.stats-row::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.04) 0%, rgba(124,58,237,0.04) 100%);
  pointer-events: none;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 120px;
  padding: 24px 28px;
  border-right: 1px solid var(--border-color);
  transition: var(--transition);
}

.stat-item:last-child {
  border-right: none;
}

.stat-item:hover {
  background: rgba(0, 212, 255, 0.04);
}

.stat-value {
  font-size: 30px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.stat-value span {
  color: var(--accent);
  font-size: 20px;
}

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

/* ===== Skills ===== */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.skill-tag {
  padding: 7px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
  cursor: default;
}

.skill-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,212,255,0.15);
}

.skill-tag.featured {
  border-color: rgba(0, 212, 255, 0.3);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ===== Skill Bars ===== */
.skill-bars {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.skill-bar-item {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.skill-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-bar-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.skill-bar-name .skill-icon {
  font-size: 15px;
}

.skill-bar-pct {
  font-size: 12px;
  color: var(--accent);
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}

.skill-bar-track {
  height: 5px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  border-radius: 3px;
  width: 0;
  transition: width 1.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-bar-fill.cyan   { background: linear-gradient(90deg, #00d4ff, #0099cc); }
.skill-bar-fill.purple { background: linear-gradient(90deg, #7c3aed, #a855f7); }
.skill-bar-fill.green  { background: linear-gradient(90deg, #10b981, #34d399); }
.skill-bar-fill.orange { background: linear-gradient(90deg, #f59e0b, #fbbf24); }

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-secondary), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 28px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  transition: var(--transition);
}

.timeline-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 24px;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.timeline-date {
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.timeline-sub {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== Project Cards ===== */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.project-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.project-links {
  display: flex;
  gap: 8px;
}

.project-link-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.project-link-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.project-name {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.project-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tech-tag {
  padding: 3px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  letter-spacing: 0.02em;
}

/* ===== Research Interest Cards ===== */
.research-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent), var(--accent-secondary));
  opacity: 0;
  transition: var(--transition);
}

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

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

.research-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.research-title {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.research-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.research-tag {
  padding: 3px 10px;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 4px;
  font-size: 11px;
  color: var(--accent);
  font-weight: 500;
}

/* ===== Notes ===== */
.note-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 22px 26px;
  transition: var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.note-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}

.note-icon-wrap {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.note-content {
  flex: 1;
}

.note-category {
  font-size: 10px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.note-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 6px;
}

.note-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.note-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-muted);
}

.note-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== Page Transition ===== */
.page {
  display: none;
  animation: fadeIn 0.4s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(0, 212, 255, 0.2);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 212, 255, 0.4);
}

/* ===== Mobile Hamburger ===== */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  width: 42px;
  height: 42px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  color: var(--text-primary);
  transition: var(--transition);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    padding: 72px 20px 60px;
  }

  .mobile-toggle {
    display: flex;
  }

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

  .avatar-wrap {
    display: none;
  }

  .stats-row {
    gap: 20px;
  }
}

@media (max-width: 600px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ===== Coming Soon Badge ===== */
.badge-soon {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.3);
  border-radius: 4px;
  font-size: 10px;
  color: #fbbf24;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ===== Info Row ===== */
.info-row {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 8px 0;
}

.info-row .info-icon {
  font-size: 15px;
  width: 20px;
  text-align: center;
}

.info-row strong {
  color: var(--text-primary);
  font-weight: 500;
}

/* ===== Scroll Progress Bar ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), #7c3aed, var(--accent));
  background-size: 200% 100%;
  transform-origin: left center;
  transform: scaleX(0);
  z-index: 999;
  animation: shimmer 2s linear infinite;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== Grid Overlay ===== */
.grid-overlay {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ===== Mouse Glow ===== */
.mouse-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.07) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: left 0.12s ease, top 0.12s ease;
}

/* ===== Floating Orbs ===== */
.orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(80px);
  opacity: 0.12;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: var(--accent);
  top: -100px;
  right: 10%;
  animation: float-orb 12s ease-in-out infinite alternate;
}

.orb-2 {
  width: 350px;
  height: 350px;
  background: var(--accent-secondary);
  bottom: 10%;
  right: 30%;
  animation: float-orb 15s ease-in-out infinite alternate-reverse;
}

@keyframes float-orb {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.1); }
}

/* ===== Tooltip ===== */
[data-tooltip] {
  position: relative;
  cursor: default;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10,15,30,0.95);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  backdrop-filter: blur(8px);
}

[data-tooltip]:hover::after {
  opacity: 1;
}

/* ===== Highlight text in cards ===== */
.text-accent { color: var(--accent); }
.text-purple { color: #a78bfa; }
.text-green  { color: #34d399; }

/* ===== Skills layout ===== */
.skills-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

@media (max-width: 700px) {
  .skills-layout { grid-template-columns: 1fr; }
}

/* ===== Nav indicator dot ===== */
.nav-item.active .nav-item-icon {
  filter: drop-shadow(0 0 6px var(--accent));
}

/* ===== Page enter animation ===== */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Only animate the direct children that are sections/headers, NOT hidden panels */
.page.active > .page-header,
.page.active > .section,
.page.active > .hero-section,
.page.active > .stats-row,
.page.active > #notes-list {
  animation: slideUp 0.45s ease both;
}

/* ===== Main content scroll ===== */
.main-content {
  overflow-y: auto;
  max-height: 100vh;
}