/* ==================== CSS Variables ==================== */
:root {
  /* Colors - Light Mode (Blue Palette) */
  /* Ateneo Blue: #003A6B | Blue Sapphire: #1B5886 | Queen Blue: #3776A1 */
  /* Silver Lake Blue: #5293BB | Iceberg: #6EB1D6 | Baby Blue: #89CFF1 */
  --color-primary: #3776A1;
  --color-primary-light: #5293BB;
  --color-primary-dark: #1B5886;
  --color-secondary: #6EB1D6;
  --color-accent: #89CFF1;
  --color-deep: #003A6B;

  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  --color-surface: #ffffff;

  --color-text: #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;

  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(55, 118, 161, 0.15);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  /* Spacing */
  --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;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-tooltip: 500;
}

/* ==================== Dark Mode Variables ==================== */
[data-theme="dark"] {
  --color-primary: #5293BB;
  --color-primary-light: #6EB1D6;
  --color-primary-dark: #3776A1;
  --color-secondary: #89CFF1;
  --color-accent: #89CFF1;

  --color-bg: #0a1929;
  --color-bg-secondary: #0d2137;
  --color-bg-tertiary: #132f4c;
  --color-surface: #0d2137;

  --color-text: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;

  --color-border: #1e4976;
  --color-border-light: #132f4c;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(82, 147, 187, 0.3);
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ==================== Custom Cursor ==================== */
.cursor,
.cursor-follower {
  display: none;
  pointer-events: none;
  position: fixed;
  border-radius: 50%;
  z-index: 9999;
  mix-blend-mode: difference;
}

@media (hover: hover) and (pointer: fine) {
  .cursor {
    display: block;
    width: 8px;
    height: 8px;
    background-color: #fff;
    transform: translate(-50%, -50%);
    transition: transform var(--transition-fast);
  }

  .cursor-follower {
    display: block;
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: transform var(--transition-base), width var(--transition-fast), height var(--transition-fast);
  }

  .cursor-follower.hovering {
    width: 50px;
    height: 50px;
    background: rgba(55, 118, 161, 0.1);
  }
}

/* ==================== Container ==================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ==================== Navigation ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background-color: transparent;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .navbar.scrolled {
  background-color: rgba(15, 23, 42, 0.9);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--color-primary);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-close {
  display: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Theme Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  background-color: var(--color-primary);
  color: #fff;
  transform: rotate(15deg);
}

.theme-toggle .fa-moon {
  position: absolute;
  transition: all var(--transition-base);
}

.theme-toggle .fa-sun {
  position: absolute;
  opacity: 0;
  transform: rotate(-90deg) scale(0);
  transition: all var(--transition-base);
}

[data-theme="dark"] .theme-toggle .fa-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0);
}

[data-theme="dark"] .theme-toggle .fa-sun {
  opacity: 1;
  transform: rotate(0) scale(1);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 20px;
  justify-content: center;
}

.nav-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ==================== Section Styles ==================== */
.section {
  padding: var(--space-20) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-tag {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 15px rgba(55, 118, 161, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(55, 118, 161, 0.5);
}

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

.btn-outline:hover {
  background: rgba(55, 118, 161, 0.1);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn i {
  transition: transform var(--transition-fast);
}

.btn:hover i {
  transform: translateX(4px);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 80% at 50% -20%, rgba(55, 118, 161, 0.15), transparent);
}

[data-theme="dark"] .hero-gradient {
  background: radial-gradient(ellipse 80% 80% at 50% -20%, rgba(55, 118, 161, 0.25), transparent);
}

.hero-particles {
  position: absolute;
  inset: 0;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background-color: var(--color-primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.3; }
  50% { transform: translateY(-20px) rotate(180deg); opacity: 0.6; }
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.hero-content {
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  border: 1px solid var(--color-border);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: #22c55e;
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.7; }
}

.hero-title {
  font-size: var(--font-size-6xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-4);
}

.highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.typing-cursor {
  animation: blink 1s step-end infinite;
  color: var(--color-primary);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.hero-socials {
  display: flex;
  gap: var(--space-4);
}

.social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border);
}

.social-link:hover {
  background-color: var(--color-primary);
  color: #fff;
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 4px 15px rgba(55, 118, 161, 0.4);
}

/* Hero Image */
.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: visible;
  padding: 30px;
}

.image-wrapper {
  position: relative;
  width: 350px;
  height: 350px;
}

.image-glow {
  position: absolute;
  inset: -20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 50%;
  opacity: 0.3;
  filter: blur(40px);
  animation: glow-pulse 4s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.1); opacity: 0.4; }
}

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

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  position: relative;
  z-index: 1;
  border: 5px solid var(--color-bg);
}

/* Floating Cards */
.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  animation: float-card 4s ease-in-out infinite;
  border: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  z-index: 10;
  white-space: nowrap;
}

.floating-card i {
  color: var(--color-primary);
  animation: icon-pulse 2s ease-in-out infinite;
}

@keyframes icon-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.card-1 {
  top: -10px;
  right: -30px;
  animation-delay: 0s;
}

.card-2 {
  top: 40%;
  left: -120px;
  animation-delay: 1.3s;
}

.card-3 {
  bottom: -10px;
  right: -20px;
  animation-delay: 2.6s;
}

@keyframes float-card {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-8px) rotate(1deg); }
  75% { transform: translateY(4px) rotate(-1deg); }
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.scroll-indicator:hover {
  color: var(--color-primary);
}

.scroll-indicator span {
  font-weight: 500;
  letter-spacing: 0.5px;
}

.scroll-indicator i {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  animation: scroll-bounce 2s ease-in-out infinite;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.scroll-indicator:hover i {
  border-color: var(--color-primary);
  background-color: rgba(55, 118, 161, 0.1);
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ==================== About Section ==================== */
.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
  max-width: 900px;
  margin: 0 auto;
}

/* Stats Row */
.about-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-6) var(--space-8);
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.stat-item {
  text-align: center;
  padding: var(--space-2) var(--space-4);
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat-plus {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
  line-height: 1.3;
}

.stat-divider {
  width: 1px;
  height: 60px;
  background: linear-gradient(180deg, transparent, var(--color-border), transparent);
}

/* About Text */
.about-text {
  text-align: center;
}

.about-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.8;
  font-size: var(--font-size-lg);
}

.about-description:last-child {
  margin-bottom: 0;
}

.about-description strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* Info Cards Grid */
.about-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.info-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.info-card:hover {
  border-color: var(--color-primary-light);
  background-color: var(--color-bg-secondary);
}

.info-card i {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-tertiary);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  flex-shrink: 0;
  font-size: var(--font-size-base);
}

.info-card div {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.info-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}

.info-card span:not(.info-label),
.info-card a {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.info-card a {
  color: var(--color-primary);
  text-decoration: none;
}

.info-card a:hover {
  text-decoration: underline;
}

/* ==================== Skills Section ==================== */
.skills {
  background-color: var(--color-bg-secondary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.skill-category {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(55, 118, 161, 0.1);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.skill-category-header i {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-lg);
}

.skill-category-header h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.skill-tag {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  background-color: rgba(55, 118, 161, 0.1);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border);
}

.skill-tag:hover {
  background-color: var(--color-primary);
  color: #fff;
  transform: scale(1.05);
}

/* ==================== Experience Section ==================== */
.experience-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.tab-btn:hover {
  color: var(--color-text);
}

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

.tab-btn i {
  font-size: var(--font-size-lg);
}

.timeline-container {
  max-width: 700px;
  margin: 0 auto;
}

.timeline-container.hidden {
  display: none;
}

.timeline {
  position: relative;
  padding-left: var(--space-12);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg,
    var(--color-primary) 0%,
    var(--color-secondary) 50%,
    var(--color-accent) 100%
  );
  border-radius: 3px;
  box-shadow: 0 0 10px rgba(55, 118, 161, 0.3);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--space-12) + 6px);
  top: var(--space-6);
  width: 22px;
  height: 22px;
  background: var(--color-bg);
  border-radius: 50%;
  border: 3px solid var(--color-primary);
  box-shadow:
    0 0 0 4px var(--color-bg),
    0 0 15px rgba(55, 118, 161, 0.4);
  z-index: 2;
  transition: all var(--transition-fast);
}

.timeline-marker::before {
  content: '';
  position: absolute;
  inset: 4px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 50%;
  animation: marker-pulse 2s ease-in-out infinite;
}

@keyframes marker-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.8); opacity: 0.7; }
}

.timeline-item:hover .timeline-marker {
  transform: scale(1.2);
  box-shadow:
    0 0 0 4px var(--color-bg),
    0 0 25px rgba(55, 118, 161, 0.6);
}

.timeline-content {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.timeline-content:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(5px);
}

.timeline-date {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.timeline-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.timeline-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.timeline-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ==================== Publications Section ==================== */
.publications {
  background-color: var(--color-bg-secondary);
}

.publications-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto;
}

.publication-card {
  display: flex;
  gap: var(--space-4);
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.publication-card:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-lg);
}

.publication-type {
  flex-shrink: 0;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 700;
  border-radius: var(--radius-md);
  height: fit-content;
}

.publication-type.journal {
  background-color: rgba(55, 118, 161, 0.1);
  color: var(--color-primary);
}

.publication-type.conference {
  background-color: rgba(110, 177, 214, 0.1);
  color: var(--color-secondary);
}

.publication-type.dissertation {
  background-color: rgba(137, 207, 241, 0.1);
  color: var(--color-accent);
}

.publication-content {
  flex: 1;
}

.publication-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
  line-height: 1.5;
}

.publication-authors {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

.publication-journal {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: var(--space-3);
}

.publication-link {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background-color: rgba(55, 118, 161, 0.1);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  align-self: center;
}

.publication-link:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

/* ==================== Contact Section ==================== */
.contact-card {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all var(--transition-fast);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.contact-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  border-radius: var(--radius-xl);
  font-size: var(--font-size-xl);
  margin: 0 auto var(--space-4);
}

.contact-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.contact-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

.contact-link:hover {
  gap: var(--space-3);
}

.contact-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.contact-socials {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.contact-socials h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  text-align: center;
}

.social-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.social-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.social-card:hover {
  background-color: var(--color-primary);
  color: #fff;
  transform: translateY(-3px);
}

.social-card i {
  font-size: var(--font-size-xl);
}

.social-card span {
  font-size: var(--font-size-xs);
  font-weight: 500;
}

/* ==================== Footer ==================== */
.footer {
  background-color: var(--color-bg-secondary);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-made {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-made i {
  color: #ef4444;
  margin: 0 2px;
}

/* ==================== Scroll to Top ==================== */
.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  border-radius: var(--radius-full);
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-5px);
}

/* ==================== Animations ==================== */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

.animate-fade-left {
  opacity: 0;
  transform: translateX(30px);
  animation: fadeLeft 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeLeft {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scroll Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==================== Responsive Design ==================== */
@media screen and (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-8);
  }

  .hero-content {
    order: 2;
  }

  .hero-image {
    order: 1;
  }

  .hero-description {
    max-width: 100%;
  }

  .hero-actions,
  .hero-socials {
    justify-content: center;
  }

  .image-wrapper {
    width: 280px;
    height: 280px;
  }

  .floating-card {
    display: none;
  }

  .hero-image {
    padding: 20px;
  }

  .about-text {
    text-align: center;
  }

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

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

  .contact-content {
    grid-template-columns: 1fr;
  }

  .contact-info {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media screen and (max-width: 768px) {
  :root {
    --font-size-6xl: 2rem;
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.5rem;
    --font-size-3xl: 1.25rem;
    --font-size-2xl: 1.125rem;
    --space-section: var(--space-10);
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 280px;
    height: 100vh;
    height: 100dvh;
    background-color: var(--color-bg);
    padding: var(--space-16) var(--space-5);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    transition: right var(--transition-base);
    z-index: 400;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    width: 100%;
  }

  .nav-link {
    font-size: var(--font-size-base);
  }

  .logo-text {
    font-size: var(--font-size-base);
    letter-spacing: 0.5px;
  }

  .nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 44px;
    height: 44px;
    font-size: var(--font-size-xl);
    color: var(--color-text);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
  }

  .nav-close:hover,
  .nav-close:active {
    background-color: var(--color-primary);
    color: #fff;
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    gap: 5px;
  }

  .nav-toggle span {
    width: 22px;
    height: 2px;
  }

  .section {
    padding: var(--space-10) 0;
  }

  .section-header {
    margin-bottom: var(--space-6);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .section-tag {
    font-size: var(--font-size-xs);
    padding: var(--space-1) var(--space-3);
  }

  .section-description {
    font-size: var(--font-size-sm);
  }

  .hero {
    padding-top: 70px;
    padding-bottom: var(--space-8);
    min-height: auto;
  }

  .hero-container {
    gap: var(--space-4);
    padding: 0 var(--space-4);
  }

  .hero-content {
    gap: var(--space-3);
  }

  .hero-badge {
    font-size: var(--font-size-xs);
    padding: var(--space-1) var(--space-3);
    margin-bottom: var(--space-3);
  }

  .hero-title {
    font-size: var(--font-size-3xl);
    line-height: 1.2;
    margin-bottom: var(--space-2);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
    min-height: 1.5em;
    margin-bottom: var(--space-2);
  }

  .hero-description {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-4);
    line-height: 1.6;
  }

  .hero-actions {
    gap: var(--space-2);
    margin-bottom: var(--space-4);
  }

  .hero-socials {
    gap: var(--space-2);
  }

  .social-link {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-base);
  }

  .btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
  }

  .hero-image {
    max-width: 100%;
    margin: 0 auto;
    padding: 10px;
  }

  .hero-image .image-wrapper {
    width: 250px;
    height: 250px;
  }

  .hero-image .profile-image {
    border-width: 4px;
  }

  .hero-image .image-border {
    inset: -4px;
  }

  .hero-image .image-glow {
    inset: -25px;
    filter: blur(35px);
  }

  .floating-card {
    display: none;
  }

  .scroll-indicator {
    display: none;
  }

  /* About Section Compact */
  .about-content {
    gap: var(--space-6);
  }

  .about-stats {
    gap: var(--space-4);
    padding: var(--space-4) var(--space-3);
  }

  .stat-item {
    padding: var(--space-1) var(--space-2);
  }

  .stat-number {
    font-size: var(--font-size-2xl);
  }

  .stat-plus {
    font-size: var(--font-size-lg);
  }

  .stat-label {
    font-size: var(--font-size-xs);
    margin-top: var(--space-1);
  }

  .stat-divider {
    height: 50px;
  }

  .about-text {
    text-align: center;
  }

  .about-description {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-3);
  }

  .about-info {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .info-card {
    padding: var(--space-3);
  }

  .info-card i {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-sm);
  }

  /* Skills Section Compact */
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .skill-category {
    padding: var(--space-4);
  }

  .skill-category h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-3);
  }

  .skill-tags {
    gap: var(--space-2);
  }

  .skill-tag {
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
  }

  /* Experience Section Compact */
  .experience-tabs {
    flex-direction: row;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
  }

  .tab-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
    flex: 1;
    justify-content: center;
  }

  .tab-btn i {
    display: none;
  }

  .timeline {
    padding-left: var(--space-8);
  }

  .timeline::before {
    left: 7px;
    width: 2px;
  }

  .timeline-marker {
    left: -32px;
    top: var(--space-3);
    width: 16px;
    height: 16px;
    border-width: 2px;
    box-shadow: 0 0 0 3px var(--color-bg), 0 0 10px rgba(55, 118, 161, 0.3);
  }

  .timeline-marker::before {
    inset: 2px;
  }

  .timeline-item {
    padding-bottom: var(--space-4);
  }

  .timeline-content {
    padding: var(--space-3);
  }

  .timeline-date {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-1);
  }

  .timeline-date i {
    font-size: var(--font-size-xs);
  }

  .timeline-title {
    font-size: var(--font-size-sm);
    margin-bottom: 2px;
  }

  .timeline-subtitle {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-1);
  }

  .timeline-description {
    font-size: var(--font-size-xs);
    line-height: 1.5;
  }

  /* Publications Section Compact */
  .publications-list {
    gap: var(--space-3);
  }

  .publication-card {
    flex-direction: column;
    padding: var(--space-3);
    gap: var(--space-2);
  }

  .publication-type {
    align-self: flex-start;
    font-size: var(--font-size-xs);
    padding: var(--space-1) var(--space-2);
  }

  .publication-title {
    font-size: var(--font-size-sm);
    line-height: 1.4;
  }

  .publication-authors {
    font-size: var(--font-size-xs);
  }

  .publication-journal {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-2);
  }

  .publication-link {
    font-size: var(--font-size-xs);
  }

  /* Contact Section Compact */
  .contact-info {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .contact-card {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto auto;
    padding: var(--space-3);
    text-align: left;
    gap: 0 var(--space-3);
  }

  .contact-card .contact-icon {
    grid-row: 1 / -1;
    width: 44px;
    height: 44px;
    font-size: var(--font-size-base);
    margin: 0;
    align-self: center;
  }

  .contact-card h3 {
    font-size: var(--font-size-sm);
    margin-bottom: 2px;
  }

  .contact-card p {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-1);
  }

  .contact-card .contact-link,
  .contact-card .contact-note {
    font-size: var(--font-size-xs);
  }

  .contact-socials h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-3);
  }

  .social-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

  .social-card {
    padding: var(--space-3);
  }

  .social-card i {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-1);
  }

  .social-card span {
    font-size: var(--font-size-xs);
  }

  /* Footer Compact */
  .footer {
    padding: var(--space-4) 0;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }

  .footer-copy,
  .footer-made {
    font-size: var(--font-size-xs);
  }

  .scroll-top {
    bottom: var(--space-3);
    right: var(--space-3);
    width: 40px;
    height: 40px;
  }
}

@media screen and (max-width: 480px) {
  .container {
    padding: 0 var(--space-3);
  }

  .hero-image .image-wrapper {
    width: 200px;
    height: 200px;
  }

  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  /* Stats - Keep horizontal but more compact */
  .about-stats {
    gap: var(--space-2);
    padding: var(--space-3) var(--space-2);
  }

  .stat-item {
    padding: 0 var(--space-1);
  }

  .stat-number {
    font-size: var(--font-size-lg);
  }

  .stat-plus {
    font-size: var(--font-size-sm);
  }

  .stat-label {
    font-size: var(--font-size-xs);
    line-height: 1.2;
  }

  .stat-divider {
    height: 35px;
  }

  .info-card span:not(.info-label),
  .info-card a {
    font-size: var(--font-size-xs);
    white-space: normal;
    word-break: break-word;
  }

  /* Social grid - 2 columns on small screens */
  .social-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .social-card {
    padding: var(--space-2);
  }

  /* Timeline compact on very small screens */
  .timeline-content {
    padding: var(--space-2);
  }

  .timeline-title {
    font-size: var(--font-size-xs);
  }

  .timeline-subtitle,
  .timeline-description {
    font-size: var(--font-size-xs);
  }

  /* Publication cards even more compact */
  .publication-card {
    padding: var(--space-2);
  }

  .publication-title {
    font-size: var(--font-size-xs);
  }
}

/* Very small screens (320px) */
@media screen and (max-width: 360px) {
  .hero-badge {
    font-size: var(--font-size-xs);
    padding: 4px 10px;
  }

  .hero-title {
    font-size: var(--font-size-xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-sm);
  }

  .section-title {
    font-size: var(--font-size-lg);
  }

  .section-tag {
    font-size: var(--font-size-xs);
    letter-spacing: 0.5px;
  }

  .hero-image .image-wrapper {
    width: 180px;
    height: 180px;
  }

  .about-stats .stat-label br {
    display: none;
  }

  .skill-category-header h3 {
    font-size: var(--font-size-sm);
  }

  .logo-text {
    font-size: var(--font-size-xs);
    letter-spacing: 0;
  }

  .nav-menu {
    width: 85%;
    max-width: none;
  }
}

/* ==================== Overlay for Mobile Menu ==================== */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 30%;
  height: 100%;
  height: 100dvh;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  z-index: 399;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Adjust overlay width for different sidebar sizes */
@media screen and (max-width: 360px) {
  .nav-overlay {
    width: 15%;
  }
}

/* ==================== Selection ==================== */
::selection {
  background-color: var(--color-primary);
  color: #fff;
}

/* ==================== Focus States ==================== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ==================== Skip Link (Accessibility) ==================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ==================== Tooltips ==================== */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) scale(0.8);
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
}

[data-tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) scale(1);
}

/* ==================== Reduced Motion (Accessibility) ==================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .particle,
  .image-border,
  .floating-card,
  .badge-dot,
  .typing-cursor {
    animation: none !important;
  }

  .animate-fade-up,
  .animate-fade-left,
  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}

/* ==================== Improved Hero Subtitle ==================== */
.hero-subtitle {
  font-size: var(--font-size-2xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  min-height: 1.5em;
  display: flex;
  align-items: center;
}

@media screen and (max-width: 768px) {
  .hero-subtitle {
    justify-content: center;
  }
}

/* ==================== Softer Image Border Animation ==================== */
.image-border {
  position: absolute;
  inset: -5px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 50%;
  opacity: 0.5;
  animation: rotate-border 30s linear infinite;
}

/* ==================== Better Contact Layout ==================== */
.contact-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}

.contact-socials {
  background-color: var(--color-surface);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.social-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.social-card {
  min-width: 100px;
}

/* ==================== Additional Animations ==================== */

/* Gradient text for section titles */
.section-title {
  background: linear-gradient(
    135deg,
    var(--color-text) 0%,
    var(--color-primary) 50%,
    var(--color-text) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Animated underline for section tags */
.section-tag {
  position: relative;
}

.section-tag::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: all var(--transition-base);
  transform: translateX(-50%);
}

.section-tag.visible::after,
.animate-on-scroll.visible .section-tag::after {
  width: 50px;
}

/* Skill category hover animation */
.skill-category {
  position: relative;
  overflow: hidden;
}

.skill-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(55, 118, 161, 0.05),
    transparent
  );
  transition: left 0.6s ease;
}

.skill-category:hover::before {
  left: 100%;
}


/* Stats counter glow effect */
.stat-number {
  text-shadow: 0 0 15px rgba(55, 118, 161, 0.2);
}

/* Publication card hover glow */
.publication-card {
  position: relative;
}

.publication-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  opacity: 0;
  box-shadow: 0 0 20px rgba(55, 118, 161, 0.15);
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.publication-card:hover::after {
  opacity: 1;
}

/* Contact card icon bounce */
.contact-card:hover .contact-icon {
  animation: icon-bounce 0.6s ease;
}

@keyframes icon-bounce {
  0%, 100% { transform: translateY(0); }
  25% { transform: translateY(-10px); }
  50% { transform: translateY(-5px); }
  75% { transform: translateY(-8px); }
}

/* Nav link animated underline */
.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  transition: all var(--transition-base);
  transform: translateX(-50%);
}

.nav-link:hover::before {
  width: 100%;
}

/* Button ripple effect */
.btn {
  position: relative;
  overflow: hidden;
}

.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: ripple-effect 0.6s linear;
  pointer-events: none;
}

@keyframes ripple-effect {
  to {
    transform: scale(4);
    opacity: 0;
  }
}


/* Hero badge shimmer */
.hero-badge {
  position: relative;
  overflow: hidden;
}

.hero-badge::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: shimmer 3s infinite;
}

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

/* Staggered scroll animations */
.animate-on-scroll {
  --stagger-delay: 0s;
  transition-delay: var(--stagger-delay);
}

.skills-grid .skill-category:nth-child(1) { --stagger-delay: 0s; }
.skills-grid .skill-category:nth-child(2) { --stagger-delay: 0.1s; }
.skills-grid .skill-category:nth-child(3) { --stagger-delay: 0.2s; }
.skills-grid .skill-category:nth-child(4) { --stagger-delay: 0.3s; }
.skills-grid .skill-category:nth-child(5) { --stagger-delay: 0.4s; }
.skills-grid .skill-category:nth-child(6) { --stagger-delay: 0.5s; }

.publications-list .publication-card:nth-child(1) { --stagger-delay: 0s; }
.publications-list .publication-card:nth-child(2) { --stagger-delay: 0.1s; }
.publications-list .publication-card:nth-child(3) { --stagger-delay: 0.15s; }
.publications-list .publication-card:nth-child(4) { --stagger-delay: 0.2s; }
.publications-list .publication-card:nth-child(5) { --stagger-delay: 0.25s; }
.publications-list .publication-card:nth-child(6) { --stagger-delay: 0.3s; }

/* Logo hover animation */
.nav-logo:hover .logo-text {
  animation: logo-bounce 0.5s ease;
}

@keyframes logo-bounce {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* Footer logo spin on hover */
.footer-logo {
  transition: transform var(--transition-base);
}

.footer-brand:hover .footer-logo {
  transform: rotate(360deg);
}

/* Social card shine effect */
.social-card {
  position: relative;
  overflow: hidden;
}

.social-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 40%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 60%
  );
  transform: rotate(45deg) translateY(-100%);
  transition: transform 0.6s ease;
}

.social-card:hover::before {
  transform: rotate(45deg) translateY(100%);
}

/* Tab button active pulse */
.tab-btn.active {
  animation: tab-pulse 2s ease-in-out infinite;
}

@keyframes tab-pulse {
  0%, 100% { box-shadow: 0 4px 15px rgba(55, 118, 161, 0.4); }
  50% { box-shadow: 0 4px 25px rgba(55, 118, 161, 0.6); }
}

/* Info item icon rotation on hover */
.info-item:hover i {
  animation: icon-rotate 0.5s ease;
}

@keyframes icon-rotate {
  0% { transform: rotate(0deg); }
  25% { transform: rotate(-10deg); }
  75% { transform: rotate(10deg); }
  100% { transform: rotate(0deg); }
}

/* Particle variety - different sizes */
.particle:nth-child(3n) {
  width: 6px;
  height: 6px;
  opacity: 0.4;
}

.particle:nth-child(5n) {
  width: 3px;
  height: 3px;
  opacity: 0.2;
}

.particle:nth-child(7n) {
  background-color: var(--color-secondary);
}

.particle:nth-child(11n) {
  background-color: var(--color-accent);
}

/* ==================== CV Present Button ==================== */
.cv-present-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.cv-present-btn:hover {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.cv-present-btn i {
  font-size: var(--font-size-sm);
  margin-left: 2px;
}

/* ==================== CV Presentation Mode ==================== */
.cv-presentation {
  position: fixed;
  inset: 0;
  background-color: var(--color-bg);
  z-index: 9999;
  display: none;
  flex-direction: column;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.cv-presentation.active {
  display: flex;
  opacity: 1;
}

.cv-presentation-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
}

.cv-slide-indicator {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.cv-slide-indicator .current-slide {
  color: var(--color-primary);
  font-weight: 700;
}

.cv-close-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
}

.cv-close-btn:hover {
  background-color: #ef4444;
  color: #fff;
  border-color: #ef4444;
}

.cv-slides-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-8);
  overflow: hidden;
}

.cv-slide {
  display: none;
  width: 100%;
  max-width: 900px;
  animation: slideIn 0.5s ease;
}

.cv-slide.active {
  display: block;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.cv-slide-content {
  text-align: center;
}

.cv-slide-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Intro Slide */
.intro-slide {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.intro-profile {
  margin-bottom: var(--space-4);
}

.intro-image {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--color-primary);
  box-shadow: 0 0 40px rgba(55, 118, 161, 0.3);
}

.intro-name {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.intro-title {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-6);
}

.intro-highlights {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.intro-highlights span {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.intro-highlights i {
  color: var(--color-primary);
}

.intro-tagline {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: var(--space-4);
}

.intro-location {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* About Slide */
.about-slide-content {
  text-align: left;
  max-width: 700px;
  margin: 0 auto;
}

.about-slide-content > p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-8);
}

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

.research-interests,
.languages-section {
  margin-bottom: var(--space-6);
}

.research-interests h3,
.languages-section h3 {
  font-size: var(--font-size-base);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.interest-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.interest-tags span {
  padding: var(--space-2) var(--space-4);
  background: rgba(55, 118, 161, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.language-items {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.language-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.lang-name {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.lang-level {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Skills Slide */
.skills-slide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  text-align: left;
}

.skill-group {
  padding: var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.skill-group h3 {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.skill-group p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Experience Slide */
.experience-slide-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  text-align: left;
  max-width: 700px;
  margin: 0 auto;
}

.exp-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
}

.exp-date {
  min-width: 100px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
}

.exp-details h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.exp-place {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

.exp-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Publications Slide */
.publications-slide-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: left;
  max-width: 700px;
  margin: 0 auto;
}

.pub-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  align-items: flex-start;
}

.pub-type {
  min-width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.pub-type.journal {
  background: rgba(55, 118, 161, 0.1);
  color: var(--color-primary);
}

.pub-type.conf {
  background: rgba(110, 177, 214, 0.1);
  color: var(--color-secondary);
}

.pub-info {
  flex: 1;
}

.pub-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 2px;
  line-height: 1.4;
}

.pub-venue {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.pub-more {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  margin-top: var(--space-4);
}

/* Research Focus Slide */
.research-focus-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  text-align: left;
}

.research-area {
  padding: var(--space-5);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.research-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-lg);
  background: rgba(55, 118, 161, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
}

.research-icon i {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
}

.research-area h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.research-area p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Projects Slide */
.projects-slide-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 700px;
  margin: 0 auto;
}

.project-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: left;
}

.project-icon {
  width: 50px;
  height: 50px;
  min-width: 50px;
  border-radius: var(--radius-lg);
  background: rgba(55, 118, 161, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-icon i {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
}

.project-info h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.project-info p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-2);
}

.project-tech {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  font-weight: 500;
}

/* Training Slide */
.training-slide-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: left;
}

.training-item {
  padding: var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.training-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.training-header h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
}

.training-date {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 500;
}

.training-place {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.training-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.training-skills span {
  padding: var(--space-1) var(--space-3);
  background: rgba(55, 118, 161, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.training-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-style: italic;
  text-align: center;
  margin-top: var(--space-2);
}

/* Contact Slide */
.contact-slide {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact-intro {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  max-width: 500px;
}

.contact-slide-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.contact-slide-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-base);
  color: var(--color-text);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.contact-slide-item:hover {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateX(5px);
}

.contact-slide-item i {
  font-size: var(--font-size-lg);
  width: 24px;
  text-align: center;
}

.contact-slide-thanks {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-primary);
}

/* CV Navigation */
.cv-navigation {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-4);
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
}

.cv-nav-btn {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
}

.cv-nav-btn:hover {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.cv-nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.cv-nav-btn:disabled:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border-color: var(--color-border);
}

.cv-dots {
  display: flex;
  gap: var(--space-2);
}

.cv-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cv-dot:hover {
  background-color: var(--color-text-muted);
}

.cv-dot.active {
  background-color: var(--color-primary);
  transform: scale(1.2);
}

.cv-keyboard-hint {
  position: absolute;
  bottom: var(--space-4);
  left: var(--space-6);
  display: flex;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.cv-keyboard-hint kbd {
  padding: 2px 6px;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
}

/* CV Presentation Responsive */
@media screen and (max-width: 768px) {
  .cv-presentation-header {
    padding: var(--space-2) var(--space-3);
  }

  .cv-slide-indicator {
    font-size: var(--font-size-xs);
  }

  .cv-close-btn {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-base);
  }

  .cv-slides-container {
    padding: var(--space-12) var(--space-3) var(--space-16);
    overflow-y: auto;
  }

  .cv-slide {
    max-width: 100%;
  }

  .cv-slide-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-3);
  }

  /* Intro Slide Compact */
  .intro-slide {
    gap: var(--space-1);
  }

  .intro-profile {
    margin-bottom: var(--space-1);
  }

  .intro-image {
    width: 80px;
    height: 80px;
    border-width: 2px;
  }

  .intro-name {
    font-size: var(--font-size-lg);
    margin-bottom: 0;
  }

  .intro-title {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-2);
  }

  .intro-tagline {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-2);
  }

  .intro-highlights {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-1);
    margin-bottom: var(--space-2);
  }

  .intro-highlights span {
    font-size: 10px;
    padding: var(--space-1) var(--space-2);
  }

  .intro-highlights span i {
    font-size: 10px;
  }

  .intro-location {
    font-size: var(--font-size-xs);
  }

  /* About Slide Compact */
  .about-slide-content {
    max-width: 100%;
  }

  .about-slide-content > p {
    font-size: var(--font-size-xs);
    line-height: 1.5;
    margin-bottom: var(--space-3);
  }

  .languages-section h3,
  .research-interests h3 {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-2);
  }

  .language-items {
    flex-direction: row;
    gap: var(--space-2);
  }

  .language-item {
    padding: var(--space-2) var(--space-3);
  }

  .lang-name {
    font-size: var(--font-size-xs);
  }

  .lang-level {
    font-size: 10px;
  }

  /* Skills Slide Compact */
  .skills-slide-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

  .skill-group {
    padding: var(--space-2);
  }

  .skill-group h3 {
    font-size: 10px;
    margin-bottom: var(--space-1);
    gap: var(--space-1);
  }

  .skill-group h3 i {
    font-size: 10px;
  }

  .skill-group p {
    font-size: 10px;
    line-height: 1.4;
  }

  /* Experience Slide Compact */
  .experience-slide-timeline {
    gap: var(--space-2);
  }

  .exp-item {
    flex-direction: column;
    gap: 0;
    padding: var(--space-2);
    border-left-width: 2px;
  }

  .exp-date {
    font-size: 10px;
    min-width: auto;
    margin-bottom: 2px;
  }

  .exp-details h3 {
    font-size: var(--font-size-xs);
    margin-bottom: 0;
  }

  .exp-place {
    font-size: 10px;
    margin-bottom: 2px;
  }

  .exp-desc {
    font-size: 10px;
    line-height: 1.4;
  }

  /* Research Focus Compact */
  .research-focus-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

  .research-area {
    padding: var(--space-2);
  }

  .research-icon {
    width: 30px;
    height: 30px;
    margin-bottom: var(--space-1);
  }

  .research-icon i {
    font-size: var(--font-size-sm);
  }

  .research-area h3 {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-1);
  }

  .research-area p {
    font-size: 10px;
    line-height: 1.4;
  }

  /* Projects Slide Compact */
  .projects-slide-list {
    gap: var(--space-2);
  }

  .project-item {
    flex-direction: row;
    gap: var(--space-2);
    padding: var(--space-2);
  }

  .project-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
  }

  .project-icon i {
    font-size: var(--font-size-sm);
  }

  .project-info h3 {
    font-size: var(--font-size-xs);
    margin-bottom: 2px;
  }

  .project-info p {
    font-size: 10px;
    line-height: 1.4;
    margin-bottom: var(--space-1);
  }

  .project-tech {
    font-size: 9px;
  }

  /* Publications Slide Compact */
  .publications-slide-list {
    gap: var(--space-2);
  }

  .pub-item {
    padding: var(--space-2);
    gap: var(--space-2);
  }

  .pub-type {
    min-width: 22px;
    height: 22px;
    font-size: 10px;
  }

  .pub-title {
    font-size: 11px;
    line-height: 1.3;
  }

  .pub-venue {
    font-size: 10px;
  }

  .pub-more {
    font-size: var(--font-size-xs);
    margin-top: var(--space-2);
  }

  /* Training Slide Compact */
  .training-slide-content {
    max-width: 100%;
  }

  .training-item {
    padding: var(--space-2);
    margin-bottom: var(--space-2);
  }

  .training-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-1);
  }

  .training-header h3 {
    font-size: var(--font-size-xs);
  }

  .training-date {
    font-size: 10px;
  }

  .training-place {
    font-size: 10px;
    margin-bottom: var(--space-2);
  }

  .training-skills {
    gap: var(--space-1);
  }

  .training-skills span {
    font-size: 9px;
    padding: 2px var(--space-2);
  }

  .training-note {
    font-size: 10px;
    margin-top: var(--space-1);
  }

  /* Contact Slide Compact */
  .contact-intro {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-3);
  }

  .contact-slide-info {
    gap: var(--space-2);
    margin-bottom: var(--space-4);
  }

  .contact-slide-item {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
    gap: var(--space-2);
  }

  .contact-slide-item i {
    font-size: var(--font-size-sm);
    width: 18px;
  }

  .contact-slide-thanks {
    font-size: var(--font-size-lg);
  }

  /* Navigation Compact */
  .cv-navigation {
    bottom: var(--space-2);
    gap: var(--space-2);
  }

  .cv-nav-btn {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-sm);
  }

  .cv-dot {
    width: 8px;
    height: 8px;
  }

  .cv-keyboard-hint {
    display: none;
  }
}