/* ==========================================================================
   Victor Collins Oppon - Portfolio CSS
   Modern, Futuristic Design with Glassmorphism
   ========================================================================== */

/* Variables */
:root {
  /* Colors */
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #ec4899;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  
  /* Dark Mode Colors */
  --bg-primary: #0f0f1e;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-tertiary: #6b7280;
  
  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-text: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-2xl: 6rem;
  
  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-secondary: 'Space Grotesk', sans-serif;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Light Mode Variables */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #9ca3af;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 0, 0, 0.1);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

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

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-medium);
}

/* Background Pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: clamp(1rem, 2vw, 1.25rem); }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  color: var(--accent-color);
}

/* ==========================================================================
   Preloader
   ========================================================================== */

#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease;
}

#preloader.hide {
  opacity: 0;
  pointer-events: none;
}

.loader {
  text-align: center;
}

.loader-cube {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  background: var(--gradient-primary);
  animation: rotate-cube 2s infinite ease-in-out;
  border-radius: 10px;
}

.loader-text {
  color: var(--text-primary);
  font-family: var(--font-secondary);
  font-size: 0.875rem;
  letter-spacing: 2px;
  animation: pulse 1s infinite;
}

@keyframes rotate-cube {
  0% { transform: rotateX(0deg) rotateY(0deg); }
  50% { transform: rotateX(180deg) rotateY(180deg); }
  100% { transform: rotateX(360deg) rotateY(360deg); }
}

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

/* ==========================================================================
   Navigation
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  transition: all var(--transition-medium);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.navbar.scrolled {
  background: var(--glass-bg);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

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

.nav-logo {
  font-family: var(--font-secondary);
  font-size: 1.5rem;
  font-weight: 700;
}

.logo-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-text .accent {
  color: var(--accent-color);
  -webkit-text-fill-color: var(--accent-color);
}

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

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

.nav-link {
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}

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

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

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--glass-bg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-2xl) 0;
}

.particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#neural-network {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.1;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 50px;
  margin-bottom: var(--spacing-lg);
  backdrop-filter: blur(10px);
}

.badge-icon {
  font-size: 1.25rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.hero-title {
  margin-bottom: var(--spacing-lg);
}

.greeting {
  font-size: 1.5rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.name {
  font-size: clamp(3rem, 8vw, 5rem);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.glitch {
  position: relative;
  display: inline-block;
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glitch::before {
  animation: glitch-1 0.5s infinite;
  clip: rect(44px, 450px, 56px, 0);
  transform: translate(-2px, -2px);
}

.glitch::after {
  animation: glitch-2 0.5s infinite;
  clip: rect(44px, 450px, 56px, 0);
  transform: translate(2px, 2px);
}

@keyframes glitch-1 {
  0% { clip: rect(132px, 350px, 101px, 30px); }
  5% { clip: rect(17px, 350px, 28px, 30px); }
  10% { clip: rect(40px, 350px, 66px, 30px); }
  15% { clip: rect(87px, 350px, 82px, 30px); }
  20% { clip: rect(137px, 350px, 61px, 30px); }
  25% { clip: rect(34px, 350px, 14px, 30px); }
  30% { clip: rect(133px, 350px, 74px, 30px); }
  35% { clip: rect(76px, 350px, 107px, 30px); }
  40% { clip: rect(59px, 350px, 130px, 30px); }
  45% { clip: rect(29px, 350px, 84px, 30px); }
  50% { clip: rect(22px, 350px, 67px, 30px); }
  55% { clip: rect(67px, 350px, 62px, 30px); }
  60% { clip: rect(10px, 350px, 105px, 30px); }
  65% { clip: rect(78px, 350px, 115px, 30px); }
  70% { clip: rect(105px, 350px, 13px, 30px); }
  75% { clip: rect(15px, 350px, 75px, 30px); }
  80% { clip: rect(66px, 350px, 39px, 30px); }
  85% { clip: rect(133px, 350px, 73px, 30px); }
  90% { clip: rect(36px, 350px, 128px, 30px); }
  95% { clip: rect(68px, 350px, 103px, 30px); }
  100% { clip: rect(14px, 350px, 100px, 30px); }
}

@keyframes glitch-2 {
  0% { clip: rect(129px, 350px, 36px, 30px); }
  5% { clip: rect(36px, 350px, 4px, 30px); }
  10% { clip: rect(85px, 350px, 66px, 30px); }
  15% { clip: rect(91px, 350px, 91px, 30px); }
  20% { clip: rect(148px, 350px, 138px, 30px); }
  25% { clip: rect(38px, 350px, 122px, 30px); }
  30% { clip: rect(69px, 350px, 54px, 30px); }
  35% { clip: rect(98px, 350px, 71px, 30px); }
  40% { clip: rect(146px, 350px, 34px, 30px); }
  45% { clip: rect(134px, 350px, 43px, 30px); }
  50% { clip: rect(102px, 350px, 80px, 30px); }
  55% { clip: rect(119px, 350px, 44px, 30px); }
  60% { clip: rect(106px, 350px, 99px, 30px); }
  65% { clip: rect(141px, 350px, 74px, 30px); }
  70% { clip: rect(20px, 350px, 78px, 30px); }
  75% { clip: rect(133px, 350px, 79px, 30px); }
  80% { clip: rect(78px, 350px, 52px, 30px); }
  85% { clip: rect(35px, 350px, 39px, 30px); }
  90% { clip: rect(67px, 350px, 70px, 30px); }
  95% { clip: rect(71px, 350px, 103px, 30px); }
  100% { clip: rect(83px, 350px, 40px, 30px); }
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  height: 2em;
}

.typing-text {
  font-family: var(--font-secondary);
}

.cursor {
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 50px;
  font-weight: 600;
  transition: all var(--transition-medium);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--glass-border);
  transform: translateY(-2px);
}

.hero-social {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

.social-link {
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  color: var(--text-primary);
  transition: all var(--transition-medium);
  backdrop-filter: blur(10px);
}

.social-link:hover {
  background: var(--gradient-primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(99, 102, 241, 0.3);
}

.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-indicator {
  width: 30px;
  height: 50px;
  border: 2px solid var(--glass-border);
  border-radius: 25px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0;
}

.scroll-indicator span {
  width: 3px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 50%;
  animation: scroll-down 2s infinite;
  opacity: 0;
}

.scroll-indicator span:nth-child(1) {
  animation-delay: 0s;
}

.scroll-indicator span:nth-child(2) {
  animation-delay: 0.15s;
}

.scroll-indicator span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes scroll-down {
  0% {
    opacity: 0;
    transform: translateY(0);
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(20px);
  }
}

/* ==========================================================================
   Sections
   ========================================================================== */

section {
  padding: var(--spacing-2xl) 0;
  position: relative;
  z-index: 2;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--spacing-md);
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.section-cta {
  text-align: center;
  margin-top: var(--spacing-2xl);
}

/* Glass Card */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--glass-shadow);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.project-card {
  overflow: hidden;
  transition: all var(--transition-medium);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.project-image {
  height: 200px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-gradient {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.8;
}

.gradient-1 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.gradient-2 { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.gradient-3 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.gradient-4 { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }

.project-icon {
  font-size: 3rem;
  color: white;
  z-index: 1;
}

.project-content {
  padding: var(--spacing-lg);
}

.project-tags {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.project-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.project-tech {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.project-tech i {
  transition: color var(--transition-fast);
}

.project-tech i:hover {
  color: var(--primary-color);
}

.project-links {
  display: flex;
  gap: var(--spacing-md);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.project-link:hover {
  color: var(--primary-color);
}

/* ==========================================================================
   Tech Stack Section
   ========================================================================== */

.tech-orbit {
  position: relative;
  width: 100%;
  max-width: 600px;
  height: 600px;
  margin: 0 auto var(--spacing-2xl);
}

.orbit-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 50px rgba(99, 102, 241, 0.5);
  z-index: 10;
}

.center-icon {
  font-size: 3rem;
  color: white;
}

.orbit-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  animation: rotate 20s linear infinite;
}

.ring-1 {
  width: 250px;
  height: 250px;
  margin-top: -125px;
  margin-left: -125px;
}

.ring-2 {
  width: 400px;
  height: 400px;
  margin-top: -200px;
  margin-left: -200px;
  animation-direction: reverse;
  animation-duration: 30s;
}

.orbit-item {
  position: absolute;
  width: 50px;
  height: 50px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-primary);
  backdrop-filter: blur(10px);
  animation: counter-rotate 20s linear infinite;
}

.ring-2 .orbit-item {
  animation-duration: 30s;
  animation-direction: reverse;
}

.orbit-item:nth-child(1) { top: -25px; left: calc(50% - 25px); }
.orbit-item:nth-child(2) { top: calc(50% - 25px); right: -25px; }
.orbit-item:nth-child(3) { bottom: -25px; left: calc(50% - 25px); }
.orbit-item:nth-child(4) { top: calc(50% - 25px); left: -25px; }
.orbit-item:nth-child(5) { top: 10%; right: 10%; }
.orbit-item:nth-child(6) { bottom: 10%; left: 10%; }

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

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

.tech-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.tech-category {
  padding: var(--spacing-lg);
}

.category-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tech-badge {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 25px;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.tech-badge:hover {
  background: var(--gradient-primary);
  color: white;
  transform: scale(1.05);
}

/* ==========================================================================
   Services Section
   ========================================================================== */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.service-card {
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-medium);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.service-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.service-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-color);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.service-link:hover {
  gap: var(--spacing-md);
}

/* ==========================================================================
   Newsletter Section
   ========================================================================== */

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

.newsletter-content {
  padding: var(--spacing-2xl);
  text-align: center;
}

.newsletter-title {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  margin-bottom: var(--spacing-md);
}

.newsletter-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.newsletter-form {
  max-width: 500px;
  margin: 0 auto;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: var(--bg-secondary);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.footer-tagline {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--gradient-primary);
  color: white;
  transform: translateY(-3px);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.footer-column h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: var(--spacing-sm);
}

.footer-column a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

.heart {
  color: var(--danger-color);
  animation: heartbeat 1.5s ease-in-out infinite;
}

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

/* ==========================================================================
   Back to Top
   ========================================================================== */

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-medium);
  box-shadow: 0 5px 15px rgba(99, 102, 241, 0.3);
  z-index: 100;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: center;
    transition: right var(--transition-medium);
    z-index: 999;
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-list {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-stats {
    gap: var(--spacing-lg);
  }
  
  .tech-orbit {
    height: 400px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .projects-grid,
  .services-grid,
  .tech-categories {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
}