/* ============================================
   DESIGN SYSTEM & GLOBAL STYLES
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors */
  --bg-primary: #0A0F1E;
  --bg-secondary: #111827;
  --bg-tertiary: #1F2937;
  --cyan: #00D4FF;
  --cyan-dark: #00A8CC;
  --purple: #7B2FFF;
  --purple-dark: #5D1FD9;
  --accent-purple: #7B2FFF;
  --accent-orange: #FF6B35;
  --accent-green: #00FF88;
  --accent-yellow: #FFB700;
  --text-primary: #FFFFFF;
  --text-secondary: #B3B3B3;
  --text-tertiary: #808080;
  --border-color: rgba(0, 212, 255, 0.1);
  --glow-cyan: rgba(0, 212, 255, 0.3);
  --glow-purple: rgba(123, 47, 255, 0.3);
  
  /* Typography */
  --heading-font: 'Space Grotesk', sans-serif;
  --body-font: 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--body-font);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(123, 47, 255, 0.05) 0%, transparent 50%);
  line-height: 1.6;
  overflow-x: hidden;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--heading-font);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-lg);
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
}

h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

@media (max-width: 768px) {
  h2 {
    font-size: 2rem;
  }
}

h3 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
  line-height: 1.8;
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

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

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

.section {
  padding: var(--spacing-2xl) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--spacing-xl) 0;
  }
}

.section--soft {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.02), rgba(123, 47, 255, 0.02));
}

.section--cta {
  background: rgba(123, 47, 255, 0.05);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-action {
  margin-top: var(--spacing-xl);
}

.clickable {
  cursor: pointer;
}

.video-meta {
  margin-top: var(--spacing-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

.section-text {
  max-width: 70ch;
  margin: 0 auto;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.detail-heading {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

.detail-heading--problem {
  color: var(--accent-orange);
}

.detail-heading--solution {
  color: var(--accent-green);
}

.section-copy {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

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

.demo-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.content-block {
  margin: var(--spacing-xl) 0;
}

.project-badge {
  display: inline-flex;
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
}

.project-title {
  font-size: 2.8rem;
  margin: var(--spacing-lg) 0;
  line-height: 1.2;
}

.feature-line {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.feature-icon {
  font-size: 1.3rem;
  min-width: 20px;
}

.tech-icon {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.tech-label {
  display: block;
  line-height: 1.3;
}

.detail-card-heading {
  color: var(--cyan);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.detail-card-heading span {
  font-size: 1.3rem;
}

.detail-card-text {
  margin: 0;
}

.not-found {
  color: #FF6B35;
  font-size: 1.1rem;
  text-align: center;
}

.link-accent {
  color: #00D4FF;
}

.hero-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-actions .btn {
  min-width: 180px;
}

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

.section-title h2 {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--heading-font);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: var(--bg-primary);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.1);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
  transform: translateY(-2px);
}

.btn-small {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.9rem;
}

.btn-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}

.btn-block {
  width: 100%;
}

.email-contact-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(8, 14, 28, 0.85);
  backdrop-filter: blur(14px);
  padding: var(--spacing-lg);
  z-index: 2000;
}

.email-contact-modal.visible {
  display: flex;
}

.email-contact-modal__content {
  width: min(560px, 100%);
  background: linear-gradient(180deg, rgba(12, 16, 32, 0.96), rgba(18, 24, 48, 0.98));
  border: 1px solid rgba(0, 212, 255, 0.18);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.45);
  position: relative;
}

.email-contact-modal__content h2 {
  margin-bottom: var(--spacing-md);
}

.email-contact-modal__content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.email-contact-field {
  display: grid;
  gap: calc(var(--spacing-sm) / 2);
  margin-bottom: var(--spacing-md);
}

.email-contact-field label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.email-contact-field input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid rgba(0, 212, 255, 0.18);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.email-contact-field input:focus {
  outline: 2px solid rgba(0, 212, 255, 0.35);
  outline-offset: 2px;
}

.email-contact-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

.email-contact-modal__close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.email-contact-modal__close:hover {
  color: var(--cyan);
}

.section-card {
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: rgba(29, 39, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.card:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.2);
  transform: translateY(-8px);
}

.card-header {
  margin-bottom: var(--spacing-md);
}

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

.card-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ============================================
   BADGES
   ============================================ */

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--heading-font);
  white-space: nowrap;
}

.badge-cyan {
  background: rgba(0, 212, 255, 0.15);
  color: var(--cyan);
  border: 1px solid rgba(0, 212, 255, 0.3);
}

.badge-purple {
  background: rgba(123, 47, 255, 0.15);
  color: var(--purple);
  border: 1px solid rgba(123, 47, 255, 0.3);
}

.badge-green {
  background: rgba(0, 255, 136, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(0, 255, 136, 0.3);
}

.badge-orange {
  background: rgba(255, 107, 53, 0.15);
  color: var(--accent-orange);
  border: 1px solid rgba(255, 107, 53, 0.3);
}

.badge-yellow {
  background: rgba(255, 183, 0, 0.15);
  color: var(--accent-yellow);
  border: 1px solid rgba(255, 183, 0, 0.3);
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.5);
  }
}

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

@keyframes typewriter {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

@keyframes blink {
  0%, 50% {
    border-right-color: var(--cyan);
  }
  50%, 100% {
    border-right-color: transparent;
  }
}

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

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.slide-in-left {
  animation: slideInLeft 0.6s ease forwards;
}

.slide-in-right {
  animation: slideInRight 0.6s ease forwards;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

header {
  position: sticky;
  top: 0;
  background: rgba(10, 15, 30, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo {
  font-family: var(--heading-font);
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.logo:hover {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-normal);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--cyan);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cyan);
  transition: width var(--transition-normal);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--cyan);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(10px, 10px);
}

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

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

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  
  .nav-links {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
  }
  
  .nav-links.active {
    max-height: 400px;
  }
  
  .nav-links a {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
  }
}

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

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

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.5;
  z-index: 0;
  pointer-events: none;
}

.hero-background div {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.glow-1 {
  width: 400px;
  height: 400px;
  background: rgba(0, 212, 255, 0.1);
  top: 50%;
  left: 10%;
  animation: Float 6s ease-in-out infinite;
}

.glow-2 {
  width: 300px;
  height: 300px;
  background: rgba(123, 47, 255, 0.1);
  top: 10%;
  right: 10%;
  animation: Float 8s ease-in-out infinite 1s;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.hero-subtitle {
  color: var(--cyan);
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  animation: fadeIn 0.8s ease forwards;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  animation: slideInLeft 0.8s ease forwards 0.2s;
  opacity: 0;
}

.typing-container {
  height: 80px;
  margin-bottom: var(--spacing-xl);
  font-size: 2.5rem;
  font-weight: 700;
  font-family: var(--heading-font);
}

@media (max-width: 768px) {
  .typing-container {
    height: 60px;
    font-size: 1.8rem;
  }
}

.typing-text {
  color: var(--cyan);
  border-right: 3px solid var(--cyan);
  white-space: nowrap;
  overflow: hidden;
  animation: blink 1s step-end infinite;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeIn 0.8s ease forwards 0.4s;
  opacity: 0;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeIn 0.8s ease forwards 0.6s;
  opacity: 0;
}

/* ============================================
   CODE BLOCK
   ============================================ */

.code-block {
  background: rgba(29, 39, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-xl) auto;
  max-width: 600px;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.8;
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.1);
  animation: fadeIn 0.8s ease forwards 0.8s;
  opacity: 0;
}

.code-block code {
  color: var(--cyan);
}

.code-keyword {
  color: var(--purple);
}

.code-string {
  color: var(--accent-green);
}

.code-comment {
  color: var(--text-tertiary);
}

/* ============================================
   FLOATING ICONS
   ============================================ */

.floating-icons {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
}

.floating-icon {
  position: absolute;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 2rem;
  animation: Float 6s ease-in-out infinite;
}

.floating-icon:nth-child(1) {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.floating-icon:nth-child(2) {
  top: 60%;
  right: 15%;
  animation-delay: 1s;
}

.floating-icon:nth-child(3) {
  bottom: 20%;
  left: 20%;
  animation-delay: 2s;
}

/* ============================================
   CATEGORIES SECTION
   ============================================ */

.categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.category-card {
  background: rgba(29, 39, 59, 0.6);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.category-card:hover {
  border-color: var(--cyan);
  transform: translateY(-5px);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.category-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.category-card h4 {
  color: var(--cyan);
  margin-bottom: var(--spacing-sm);
}

.category-card p {
  font-size: 0.9rem;
}

/* ============================================
   PROJECT GRID
   ============================================ */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

.project-card {
  background: rgba(29, 39, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--cyan);
  transform: translateY(-10px);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.2);
}

.project-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(123, 47, 255, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--cyan);
  opacity: 0.5;
  transition: all var(--transition-normal);
}

.project-card:hover .project-image {
  opacity: 1;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(123, 47, 255, 0.2));
}

.project-content {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-category {
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}

.project-title {
  margin-bottom: var(--spacing-sm);
}

.project-description {
  flex: 1;
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.tech-icon {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.1);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  border: 1px solid var(--border-color);
}

.project-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.project-actions .btn {
  flex: 1;
}

/* ============================================
   VIDEO GRID
   ============================================ */

.videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

@media (max-width: 768px) {
  .videos-grid {
    grid-template-columns: 1fr;
  }
}

.video-card {
  background: rgba(29, 39, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.video-card:hover {
  border-color: var(--cyan);
  transform: translateY(-10px);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.2);
}

.video-thumbnail {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(123, 47, 255, 0.1));
  cursor: pointer;
}

.video-thumbnail iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-thumbnail::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 212, 255, 0.1);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 1;
}

.video-card:hover .video-thumbnail::before {
  opacity: 1;
}

.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.85rem;
  z-index: 2;
}

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

.video-title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.video-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.video-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

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

.filter-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.filter-btn {
  padding: var(--spacing-xs) var(--spacing-lg);
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--heading-font);
  font-weight: 600;
  transition: all var(--transition-normal);
}

.filter-btn:hover,
.filter-btn.active {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  border-color: var(--cyan);
  color: var(--bg-primary);
}

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

footer {
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0;
  background: rgba(10, 15, 30, 0.5);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  color: var(--cyan);
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

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

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

.social-links a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--cyan);
  text-decoration: none;
  transition: all var(--transition-normal);
  font-size: 1.2rem;
}

.social-links a:hover {
  background: var(--cyan);
  color: var(--bg-primary);
  transform: translateY(-3px);
}

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

/* ============================================
   SCROLL PROGRESS BAR
   ============================================ */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  z-index: 2000;
  transition: width 0.1s ease;
}

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

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  border: none;
  border-radius: var(--radius-md);
  color: var(--bg-primary);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  z-index: 1000;
  transition: all var(--transition-normal);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 50px rgba(0, 212, 255, 0.5);
}

.back-to-top.show {
  display: flex;
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
    font-size: 1.2rem;
  }
}

/* ============================================
   CURSOR GLOW
   ============================================ */

.cursor-glow {
  position: fixed;
  width: 30px;
  height: 30px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: screen;
  opacity: 0.8;
  display: none;
}

@media (min-width: 1024px) {
  .cursor-glow {
    display: block;
  }
}

/* ============================================
   FORM STYLES
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm);
  background: rgba(29, 39, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--body-font);
  font-size: 1rem;
  transition: all var(--transition-normal);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 150px;
}

.contact-quick-links,
.offer-cta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.mailto-card,
.cta-card {
  background: rgba(29, 39, 59, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.mailto-card h3,
.cta-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--cyan);
}

.mailto-card p,
.cta-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.mailto-button,
.cta-button {
  margin-top: var(--spacing-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
}

.mailto-card a,
.cta-card a {
  width: 100%;
}

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

.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.skill-group {
  background: rgba(29, 39, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.skill-group h4 {
  color: var(--cyan);
  margin-bottom: var(--spacing-md);
}

.skill-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

/* ============================================
   TIMELINE
   ============================================ */

.timeline {
  position: relative;
  padding: var(--spacing-xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), var(--purple));
}

@media (max-width: 768px) {
  .timeline::before {
    left: 20px;
  }
}

.timeline-item {
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-left: 0;
  margin-right: 50%;
  text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: 50%;
  margin-right: 0;
}

@media (max-width: 768px) {
  .timeline-item:nth-child(odd) .timeline-content,
  .timeline-item:nth-child(even) .timeline-content {
    margin-left: 60px;
    margin-right: 0;
    text-align: left;
  }
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  width: 20px;
  height: 20px;
  background: var(--cyan);
  border: 3px solid var(--bg-primary);
  border-radius: 50%;
  z-index: 1;
}

@media (max-width: 768px) {
  .timeline-dot {
    left: 20px;
  }
}

.timeline-content {
  background: rgba(29, 39, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.2);
}

.timeline-date {
  color: var(--cyan);
  font-weight: 600;
}

.timeline-title {
  font-size: 1.25rem;
  margin: var(--spacing-sm) 0;
}

.timeline-description {
  color: var(--text-secondary);
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
}

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

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

.text-cyan {
  color: var(--cyan);
}

.text-purple {
  color: var(--purple);
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.px-sm { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  header, footer, .back-to-top, .scroll-progress {
    display: none;
  }
}