/* ===================================
   PREMIUM PORTFOLIO - CSS VARIABLES
   =================================== */

:root {
  /* Colors - Light Theme */
  --color-primary: #6366f1;
  --color-secondary: #ec4899;
  --color-accent: #14b8a6;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* Background Colors */
  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  --color-surface: #ffffff;
  
  /* Text Colors */
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #64748b;
  
  /* Border & Divider */
  --color-border: #e2e8f0;
  --color-divider: #cbd5e1;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* 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 cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-tertiary: #334155;
  --color-surface: #1e293b;
  
  --color-text: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-tertiary: #94a3b8;
  
  --color-border: #334155;
  --color-divider: #475569;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.6);
}

/* ===================================
   RESET & BASE STYLES
   =================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

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

ul, ol {
  list-style: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ===================================
   UTILITY CLASSES
   =================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.hidden {
  display: none !important;
}

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

/* ===================================
   NAVIGATION
   =================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-fixed);
  background-color: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

[data-theme="light"] .navbar {
  background-color: rgba(255, 255, 255, 0.9);
  border-bottom-color: var(--color-border);
}

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

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  z-index: 2;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
  font-weight: 800;
  font-family: var(--font-display);
}

.logo-text {
  font-family: var(--font-display);
  color: var(--color-text);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-link {
  position: relative;
  font-weight: 500;
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 2;
}

.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  font-size: 1.125rem;
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
}

.theme-toggle:hover {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  transform: rotate(180deg);
  border-color: transparent;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 28px;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

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

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem var(--spacing-lg) 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.15), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(236, 72, 153, 0.15), transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(20, 184, 166, 0.1), transparent 50%);
}

.hero-pattern {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background-color: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: var(--spacing-lg);
}

.hero-greeting {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.hero-name {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-role {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  font-family: var(--font-display);
  color: var(--color-text-secondary);
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-xl);
  max-width: 540px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.hero-social {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  color: var(--color-text);
  transition: all var(--transition-base);
}

.social-link:hover {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border-color: transparent;
  transform: translateY(-4px);
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image {
  position: relative;
  z-index: 1;
}

.image-wrapper {
  width: 400px;
  height: 400px;
  border-radius: 50%;
  overflow: hidden;
  border: 8px solid var(--color-surface);
  box-shadow: var(--shadow-2xl);
  position: relative;
}

.image-wrapper::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  border-radius: 50%;
  z-index: -1;
  animation: rotate 4s linear infinite;
}

@keyframes rotate {
  to {
    transform: rotate(360deg);
  }
}

.profile-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10rem;
  color: var(--color-text-tertiary);
}

/* Profile image (hero) */
.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.floating-elements {
  position: absolute;
  width: 100%;
  height: 100%;
}

.floating-card {
  position: absolute;
  padding: 1rem 1.5rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 0.938rem;
  animation: float 3s ease-in-out infinite;
}

.floating-card i {
  font-size: 1.5rem;
  color: var(--color-primary);
}

.floating-card[data-float="1"] {
  top: 10%;
  left: -10%;
  animation-delay: 0s;
}

.floating-card[data-float="2"] {
  top: 60%;
  left: -15%;
  animation-delay: 0.5s;
}

.floating-card[data-float="3"] {
  top: 35%;
  right: -10%;
  animation-delay: 1s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
}

.mouse {
  width: 28px;
  height: 45px;
  border: 2px solid var(--color-text-tertiary);
  border-radius: 15px;
  position: relative;
}

.wheel {
  width: 4px;
  height: 8px;
  background-color: var(--color-text-tertiary);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 2s infinite;
}

@keyframes scroll {
  0% {
    opacity: 0;
    top: 8px;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    top: 24px;
  }
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

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

.btn-block {
  width: 100%;
}

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

section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-tag {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background-color: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  font-family: var(--font-display);
  color: var(--color-text);
  margin-bottom: 1rem;
}

.section-description {
  font-size: 1.125rem;
  color: var(--color-text-tertiary);
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
  margin: 0 auto;
}

/* ===================================
   ABOUT SECTION
   =================================== */

.about {
  background-color: var(--color-bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 450px;
}

/* About image */
.about-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  position: relative;
  z-index: 1;
}

.image-decoration {
  position: absolute;
  inset: -20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  opacity: 0.1;
  border-radius: var(--radius-2xl);
  z-index: 0;
}

.about-subtitle {
  font-size: 1.75rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.about-text {
  font-size: 1.063rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: var(--spacing-xl) 0;
}

.highlight-item {
  display: flex;
  gap: 1rem;
}

.highlight-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.highlight-item h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.highlight-item p {
  font-size: 0.938rem;
  color: var(--color-text-tertiary);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: var(--spacing-xl) 0;
}

.stat-box {
  text-align: center;
  padding: 1.5rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.stat-box:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-display);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.stat-label {
  display: block;
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
}

.about-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: var(--spacing-xl);
}

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

.project-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.filter-btn {
  padding: 0.625rem 1.5rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

.filter-btn:hover {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border-color: transparent;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--color-primary);
}

.project-image {
  position: relative;
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-image-placeholder {
  font-size: 4rem;
  color: var(--color-text-tertiary);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.9), rgba(236, 72, 153, 0.9));
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.project-link {
  width: 56px;
  height: 56px;
  background-color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: transform var(--transition-base);
}

.project-link:hover {
  transform: scale(1.1) rotate(45deg);
}

.project-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  width: fit-content;
}

.project-title {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.project-description {
  font-size: 0.938rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  flex: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.tech-badge {
  padding: 0.25rem 0.625rem;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
}

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

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

.skills-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: var(--spacing-3xl);
}

.skill-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: all var(--transition-base);
}

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

.skill-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: white;
  margin-bottom: 1.5rem;
}

.skill-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.skill-card p {
  font-size: 0.938rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  padding: 0.375rem 0.875rem;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  font-size: 0.813rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.skill-level {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.level-bar {
  flex: 1;
  height: 8px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.level-fill {
  height: 100%;
  background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
}

.level-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  min-width: 45px;
}

.skills-circular {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 2rem;
  margin-top: var(--spacing-xl);
}

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

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.contact-info h3 {
  font-size: 2rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--color-text);
  margin-bottom: 1rem;
}

.contact-info > p {
  font-size: 1.063rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: var(--spacing-xl);
}

.contact-item {
  display: flex;
  gap: 1rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.125rem;
}

.contact-text h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.contact-text p,
.contact-text a {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
}

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

.contact-social {
  display: flex;
  gap: 1rem;
}

.social-btn {
  width: 48px;
  height: 48px;
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text);
  transition: all var(--transition-base);
}

.social-btn:hover {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border-color: transparent;
  transform: translateY(-4px);
}

.contact-form-wrapper {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-group {
  position: relative;
}

.form-group label {
  display: block;
  font-size: 0.938rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  padding-left: 3rem;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  color: var(--color-text);
  transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-icon {
  position: absolute;
  left: 1rem;
  bottom: 0.875rem;
  color: var(--color-text-tertiary);
  font-size: 1.125rem;
}

.form-message {
  padding: 1rem;
  border-radius: var(--radius-lg);
  text-align: center;
  font-weight: 500;
  margin-top: 1rem;
}

.form-message.success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.form-message.error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

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

.footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 3rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-brand h3 {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-display);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  color: var(--color-text);
  transition: all var(--transition-base);
}

.footer-social a:hover {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border-color: transparent;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

.visitor-counter {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

/* ===================================
   BACK TO TOP
   =================================== */

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
}

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

@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .hero-visual {
    order: -1;
  }
  
  .image-wrapper {
    width: 300px;
    height: 300px;
  }
  
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-2xl);
    padding: 6rem 2rem 2rem;
    gap: 1.5rem;
    transition: right var(--transition-base);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-link::after {
    display: none;
  }
  
  .hero {
    padding: 6rem var(--spacing-md) 3rem;
  }
  
  .image-wrapper {
    width: 250px;
    height: 250px;
  }
  
  .floating-card {
    display: none;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-showcase {
    grid-template-columns: 1fr;
  }
  
  .about-stats {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .nav-container {
    padding: 0.875rem var(--spacing-md);
  }
  
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta .btn {
    width: 100%;
  }
  
  .contact-form-wrapper {
    padding: 1.5rem;
  }
}