* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Premium Color Palette */
  --primary-blue: #0066FF;
  --primary-purple: #7C3AED;
  --primary-indigo: #4F46E5;
  --accent-cyan: #06B6D4;
  --accent-pink: #EC4899;
  --accent-orange: #F59E0B;
  --success-green: #10B981;
  
  /* Neutral Colors - Dark Theme */
  --bg-primary: #000000;
  --bg-secondary: #0A0A0A;
  --bg-tertiary: #111111;
  --bg-elevated: #1A1A1A;
  --bg-glass: rgba(26, 26, 26, 0.8);
  --bg-card: rgba(255, 255, 255, 0.03);
  
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-tertiary: rgba(255, 255, 255, 0.5);
  --text-quaternary: rgba(255, 255, 255, 0.3);
  
  --border-primary: rgba(255, 255, 255, 0.08);
  --border-secondary: rgba(255, 255, 255, 0.05);
  --border-focus: rgba(0, 102, 255, 0.5);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.16);
  --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.24);
  --shadow-xl: 0 16px 72px rgba(0, 0, 0, 0.32);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  --spacing-unit: 8px;
  --container-max: 1280px;
  --container-padding: 24px;
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.light-mode {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --bg-tertiary: #F3F4F6;
  --bg-elevated: #FFFFFF;
  --bg-glass: rgba(255, 255, 255, 0.9);
  --bg-card: rgba(0, 0, 0, 0.02);
  
  --text-primary: #0A0A0A;
  --text-secondary: rgba(0, 0, 0, 0.7);
  --text-tertiary: rgba(0, 0, 0, 0.5);
  --text-quaternary: rgba(0, 0, 0, 0.3);
  
  --border-primary: rgba(0, 0, 0, 0.08);
  --border-secondary: rgba(0, 0, 0, 0.05);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 16px 72px rgba(0, 0, 0, 0.12);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

::selection {
  background: var(--primary-blue);
  color: white;
}

/* ==================== SVG ICONS ==================== */

.icon {
  display: inline-block;
  vertical-align: middle;
  fill: currentColor;
  flex-shrink: 0;
}

/* ==================== TYPOGRAPHY ==================== */

.heading-1 {
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.heading-2 {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.heading-3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.heading-4 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.body-large {
  font-size: clamp(1.125rem, 1.5vw, 1.5rem);
  line-height: 1.6;
  font-weight: 400;
}

.body-base {
  font-size: 1rem;
  line-height: 1.6;
  font-weight: 400;
}

.body-small {
  font-size: 0.875rem;
  line-height: 1.5;
  font-weight: 400;
}

/* ==================== NAVBAR ==================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: var(--bg-glass);
  backdrop-filter: saturate(180%) blur(24px);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  border-bottom: 1px solid var(--border-primary);
  z-index: 9999;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  height: 64px;
  box-shadow: var(--shadow-md);
  background: var(--bg-glass);
}

.navbar-content {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 10;
}

.nav-logo::before {
  content: '';
  width: 8px;
  height: 8px;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  border-radius: 50%;
  box-shadow: 0 0 16px var(--primary-blue);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.8; }
}

.nav-logo:hover {
  color: var(--primary-blue);
  transform: translateX(-2px);
}

.nav-menu {
  display: flex;
  gap: 8px;
  list-style: none;
  align-items: center;
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: all var(--transition-base);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
}

.nav-menu a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-card);
  opacity: 0;
  transition: opacity var(--transition-base);
  border-radius: var(--radius-full);
}

.nav-menu a:hover {
  color: var(--text-primary);
}

.nav-menu a:hover::before {
  opacity: 1;
}

.nav-menu a span {
  position: relative;
  z-index: 1;
}

.nav-controls {
  display: flex;
  gap: 12px;
  align-items: center;
}

.theme-switcher {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  color: var(--text-primary);
  font-size: 16px;
  position: relative;
  overflow: hidden;
}

.theme-switcher::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.theme-switcher:hover {
  transform: scale(1.05);
  border-color: var(--border-focus);
}

.theme-switcher:hover::before {
  opacity: 0.1;
}

.theme-switcher i {
  position: relative;
  z-index: 1;
  transition: transform var(--transition-bounce);
}

.theme-switcher:hover i {
  transform: rotate(20deg) scale(1.1);
}

.mobile-menu-btn {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.mobile-menu-btn:hover {
  background: var(--bg-elevated);
}

/* ==================== HERO SECTION ==================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(72px + 80px) var(--container-padding) 80px;
  position: relative;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  inset: 0;
  opacity: 0.6;
  background: 
    radial-gradient(circle at 20% 30%, rgba(0, 102, 255, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(124, 58, 237, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(79, 70, 229, 0.15) 0%, transparent 60%);
  animation: gradient-float 20s ease-in-out infinite;
  will-change: transform;
  z-index: 0;
}

@keyframes gradient-float {
  0%, 100% { transform: translate(0, 0) scale(1) rotate(0deg); }
  33% { transform: translate(30px, -30px) scale(1.05) rotate(1deg); }
  66% { transform: translate(-20px, 20px) scale(0.95) rotate(-1deg); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(var(--border-secondary) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-secondary) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  z-index: 0;
}

.hero-content {
  max-width: 1100px;
  text-align: center;
  position: relative;
  z-index: 10;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(124, 58, 237, 0.1));
  color: var(--primary-blue);
  margin-bottom: 32px;
  opacity: 1;
  animation: fade-in-up 0.8s var(--transition-slow) 0.1s backwards;
  position: relative;
  overflow: hidden;
}

.hero-badge::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: translateX(-100%);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  to { transform: translateX(100%); }
}

.hero-badge i {
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.hero-title {
  margin-bottom: 32px;
  opacity: 1;
  animation: fade-in-up 0.8s var(--transition-slow) 0.2s backwards;
}

.hero-gradient {
  background: linear-gradient(135deg, 
    var(--primary-blue) 0%, 
    var(--primary-purple) 50%, 
    var(--accent-pink) 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-flow 8s ease infinite;
  display: inline-block;
  position: relative;
}

@keyframes gradient-flow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  max-width: 800px;
  margin: 0 auto 48px;
  color: var(--text-secondary);
  opacity: 1;
  animation: fade-in-up 0.8s var(--transition-slow) 0.3s backwards;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
  opacity: 1;
  animation: fade-in-up 0.8s var(--transition-slow) 0.4s backwards;
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==================== BUTTONS ==================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-base);
  border: none;
  cursor: pointer;
  letter-spacing: -0.01em;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
  transform: scale(0);
}

.btn:hover::before {
  opacity: 1;
  transform: scale(1);
  transition: all var(--transition-slow);
}

.btn i {
  transition: transform var(--transition-base);
  position: relative;
  z-index: 1;
}

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

.btn span {
  position: relative;
  z-index: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
  color: white;
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 102, 255, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
}

.btn-secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ==================== TIME BADGE ==================== */

.time-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-blue);
  opacity: 1;
  animation: fade-in-up 0.8s var(--transition-slow) 0.5s backwards;
  transition: all var(--transition-base);
}

.time-badge:hover {
  transform: scale(1.05);
  border-color: var(--border-focus);
  box-shadow: 0 4px 16px rgba(0, 102, 255, 0.2);
}

.time-badge i {
  animation: pulse-icon 2s ease-in-out infinite;
}

@keyframes pulse-icon {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.95); }
}

.time-location {
  color: var(--text-tertiary);
  font-size: 0.8125rem;
  font-weight: 500;
}

/* ==================== SECTIONS ==================== */

section {
  padding: calc(var(--spacing-unit) * 15) var(--container-padding);
  position: relative;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: calc(var(--spacing-unit) * 10);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.section-eyebrow {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
  display: inline-block;
}

.section-title {
  margin-bottom: 24px;
}

.section-description {
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* ==================== SKILLS SECTION ==================== */

.skills {
  background: var(--bg-secondary);
  position: relative;
}

.skills::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    var(--border-primary), 
    transparent);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(340px, 100%), 1fr));
  gap: 24px;
}

.skill-card {
  background: var(--bg-elevated);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-primary);
  padding: 40px;
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
  cursor: default;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    var(--primary-blue), 
    var(--primary-purple), 
    var(--accent-pink));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.skill-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), 
    rgba(0, 102, 255, 0.05), 
    transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.skill-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-focus);
}

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

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

.skill-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: white;
  margin-bottom: 28px;
  transition: all var(--transition-bounce);
  box-shadow: 0 8px 24px rgba(0, 102, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.skill-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3), transparent);
  transform: scale(0);
  transition: transform var(--transition-slow);
}

.skill-card:hover .skill-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 12px 40px rgba(0, 102, 255, 0.5);
}

.skill-card:hover .skill-icon::before {
  transform: scale(1);
}

.skill-title {
  margin-bottom: 20px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  cursor: default;
}

.tag:hover {
  background: rgba(0, 102, 255, 0.1);
  border-color: var(--primary-blue);
  color: var(--primary-blue);
  transform: translateY(-2px);
}

/* ==================== PROJECTS SECTION ==================== */

.projects {
  background: var(--bg-primary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(360px, 100%), 1fr));
  gap: 32px;
}

.project-card {
  background: var(--bg-elevated);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--border-primary);
  transition: all var(--transition-slow);
  display: flex;
  flex-direction: column;
  position: relative;
  cursor: pointer;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, 
    rgba(0, 102, 255, 0.03), 
    rgba(124, 58, 237, 0.03));
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
  z-index: 1;
}

.project-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-focus);
}

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

.project-header {
  height: 280px;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 72px;
  color: rgba(255, 255, 255, 0.95);
  position: relative;
  overflow: hidden;
}

.project-header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: rotate-gradient 20s linear infinite;
}

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

.project-header i {
  position: relative;
  z-index: 1;
  transition: transform var(--transition-bounce);
}

.project-card:hover .project-header i {
  transform: scale(1.1) rotate(5deg);
}

.project-body {
  padding: 36px;
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 2;
}

.project-title {
  margin-bottom: 16px;
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 28px;
  flex: 1;
  line-height: 1.7;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.project-tag {
  padding: 6px 14px;
  background: rgba(0, 102, 255, 0.08);
  border: 1px solid rgba(0, 102, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary-blue);
  letter-spacing: 0.01em;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary-blue);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all var(--transition-base);
  position: relative;
}

.project-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-blue);
  transition: width var(--transition-base);
}

.project-link:hover {
  gap: 14px;
  color: var(--primary-purple);
}

.project-link:hover::after {
  width: calc(100% - 24px);
}

.project-link i {
  transition: transform var(--transition-base);
}

.project-link:hover i {
  transform: translateX(4px);
}

/* ==================== CONTACT SECTION ==================== */

.contact {
  background: var(--bg-secondary);
  position: relative;
}

.contact::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    var(--border-primary), 
    transparent);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-primary);
  padding: 56px 40px;
  text-align: center;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-slow);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, 
    rgba(0, 102, 255, 0.05), 
    transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.contact-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-focus);
}

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

.contact-icon {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: white;
  box-shadow: 0 8px 32px rgba(0, 102, 255, 0.4);
  transition: all var(--transition-bounce);
  position: relative;
  overflow: hidden;
}

.contact-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3), transparent);
  transform: scale(0);
  transition: transform var(--transition-slow);
}

.contact-card:hover .contact-icon {
  transform: scale(1.15) rotate(-10deg);
  box-shadow: 0 12px 48px rgba(0, 102, 255, 0.6);
}

.contact-card:hover .contact-icon::before {
  transform: scale(1);
}

.contact-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: color var(--transition-base);
}

.contact-card:hover .contact-title {
  color: var(--primary-blue);
}

.contact-detail {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-base);
}

.contact-card:hover .contact-detail {
  color: var(--text-primary);
}

/* ==================== FOOTER ==================== */

footer {
  background: var(--bg-primary);
  padding: calc(var(--spacing-unit) * 10) var(--container-padding);
  border-top: 1px solid var(--border-primary);
}

.footer-content {
  max-width: var(--container-max);
  margin: 0 auto;
  text-align: center;
}

.footer-social {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 40px;
}

.social-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 22px;
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.social-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.social-btn i {
  position: relative;
  z-index: 1;
  transition: transform var(--transition-bounce);
}

.social-btn:hover {
  color: white;
  transform: translateY(-8px) scale(1.1);
  border-color: transparent;
  box-shadow: 0 12px 32px rgba(0, 102, 255, 0.4);
}

.social-btn:hover::before {
  opacity: 1;
}

.social-btn:hover i {
  transform: scale(1.1) rotate(-5deg);
}

.footer-text {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  letter-spacing: -0.01em;
}

/* ==================== SCROLL ANIMATIONS ==================== */

.scroll-animate {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ==================== RESPONSIVE DESIGN ==================== */

@media (max-width: 1024px) {
  :root {
    --container-padding: 20px;
  }
  
  .skills-grid,
  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  }
  
  .project-header {
    height: 240px;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
  }

  .navbar {
    height: 64px;
  }

  .navbar.scrolled {
    height: 56px;
  }

  .navbar-content {
    gap: 16px;
  }

  .nav-logo {
    font-size: 1.125rem;
  }

  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    backdrop-filter: saturate(180%) blur(24px);
    -webkit-backdrop-filter: saturate(180%) blur(24px);
    flex-direction: column;
    padding: 20px 16px;
    gap: 8px;
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
    border-bottom: 1px solid var(--border-primary);
    box-shadow: var(--shadow-xl);
    z-index: 9998;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    font-size: 1rem;
    font-weight: 600;
    width: 100%;
    text-align: left;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    transition: all var(--transition-base);
  }
  
  .nav-menu a::before {
    opacity: 1;
  }
  
  .nav-menu a:active {
    transform: scale(0.98);
    background: var(--bg-elevated);
  }

  .mobile-menu-btn {
    display: flex;
    z-index: 9999;
  }
  
  /* Prevent scroll when mobile menu is open */
  body.menu-open {
    overflow: hidden;
  }
  
  /* Add overlay for mobile menu */
  .nav-menu::after {
    content: '';
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: -1;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow);
  }
  
  .nav-menu.active::after {
    opacity: 1;
    visibility: visible;
  }

  .hero {
    padding: calc(64px + 60px) 16px 60px;
    min-height: 90vh;
  }

  .hero-badge {
    font-size: 0.75rem;
    padding: 8px 20px;
    gap: 8px;
  }

  section {
    padding: calc(var(--spacing-unit) * 10) 16px;
  }

  .section-header {
    margin-bottom: calc(var(--spacing-unit) * 6);
  }

  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .skill-card {
    padding: 32px 24px;
  }
  
  .project-body {
    padding: 28px;
  }
  
  .project-header {
    height: 200px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contact-card {
    padding: 44px 28px;
  }
  
  /* Optimize hover effects on mobile */
  .skill-card:hover,
  .project-card:hover,
  .contact-card:hover {
    transform: none;
  }
  
  @media (hover: none) {
    .skill-card:active,
    .project-card:active {
      transform: scale(0.98);
    }
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

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

  .time-badge {
    font-size: 0.75rem;
    padding: 10px 20px;
    gap: 8px;
  }

  .project-header {
    height: 180px;
  }
  
  .project-header .icon {
    width: 56px;
    height: 56px;
  }
  
  .skill-icon {
    width: 64px;
    height: 64px;
  }
  
  .skill-icon .icon {
    width: 28px;
    height: 28px;
  }
}

/* ==================== ACCESSIBILITY ==================== */

*:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

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

/* ==================== SMOOTH SCROLLBAR ==================== */

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-primary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-focus);
}