/* ===== ROOT VARIABLES ===== */
:root {
  --accent-1: #6366f1;  /* Indigo - EDIT main brand color */
  --accent-2: #8b5cf6;  /* Violet */
  --accent-3: #3b82f6;  /* Blue */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
}

/* ===== RESET & BASE ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
section { padding: 100px 0; position: relative; }
h1, h2, h3 { line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
.section-title { text-align: center; margin-bottom: 16px; }
.section-title span { 
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-desc { 
  text-align: center; 
  max-width: 700px; 
  margin: 0 auto 60px; 
  color: var(--text-secondary);
  font-size: 1.125rem;
}

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

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all 0.3s;
}
.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  padding: 12px 0;
}
.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 1.75rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  transition: 0.3s;
  position: relative;
}
.nav-links a:hover { color: var(--accent-1); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-1);
  transition: width 0.3s;
}
.nav-links a:hover::after { width: 100%; }
.nav-actions { display: flex; gap: 16px; align-items: center; }
.theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: 0.3s;
}
.theme-toggle:hover { transform: rotate(20deg); }
.theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: block; }
[data-theme="dark"] .theme-toggle .moon { display: none; }
.menu-toggle { display: none; font-size: 1.5rem; cursor: pointer; }

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}
.gradient-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
  opacity: 0.1;
  z-index: 0;
}
.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-1) 0%, transparent 70%);
  top: -200px;
  right: -200px;
  opacity: 0.3;
  filter: blur(80px);
  animation: float 20s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-50px, 50px) scale(1.1); }
}
.hero-content { position: relative; z-index: 1; }
.gradient-text {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 24px auto 40px;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s;
}
.btn-primary:hover::before { left: 100%; }
.btn-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}
.btn-glass:hover {
  background: var(--accent-1);
  color: white;
  border-color: var(--accent-1);
}
.btn-full { width: 100%; }

/* ===== ANIMATIONS ===== */
.fade-in { animation: fadeIn 0.8s ease-out; }
.fade-in-delay { animation: fadeIn 0.8s ease-out 0.2s both; }
.fade-in-delay-2 { animation: fadeIn 0.8s ease-out 0.4s both; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ===== ABOUT & STATS ===== */
.about { background: var(--bg-secondary); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  margin-top: 60px;
}
.stat-card {
  padding: 32px;
  text-align: center;
}
.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label {
  color: var(--text-secondary);
  margin-top: 8px;
  font-weight: 500;
}

/* ===== PROJECTS ===== */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 32px;
}
.project-card {
  padding: 40px;
  transition: all 0.4s;
  cursor: pointer;
}
.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.project-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: white;
}
.project-card h3 { font-size: 1.5rem; margin-bottom: 12px; }
.project-card p { color: var(--text-secondary); margin-bottom: 20px; }
.feature-list {
  list-style: none;
  padding: 0;
}
.feature-list li {
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
  color: var(--text-secondary);
}
.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-1);
  font-weight: 700;
}

/* ===== SERVICES ===== */
.services { background: var(--bg-secondary); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.service-item {
  padding: 32px;
  text-align: center;
  transition: 0.3s;
}
.service-item:hover { transform: translateY(-4px); }
.service-item h3 {
  color: var(--accent-1);
  margin-bottom: 12px;
  font-size: 1.25rem;
}
.service-item p { color: var(--text-secondary); }

/* ===== WHY US ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
}
.feature {
  padding: 32px;
  text-align: center;
}
.feature-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}
.feature h3 { margin-bottom: 12px; }
.feature p { color: var(--text-secondary); }

/* ===== TESTIMONIALS ===== */
.testimonials { background: var(--bg-secondary); }
.testimonial-carousel {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}
.testimonial-track {
  display: flex;
  transition: transform 0.5s ease;
}
.testimonial-card {
  min-width: 100%;
  padding: 40px;
  text-align: center;
}
.testimonial-card p {
  font-size: 1.25rem;
  font-style: italic;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.author {
  color: var(--text-secondary);
  font-weight: 600;
}
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 32px;
}
.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-secondary);
  opacity: 0.3;
  cursor: pointer;
  transition: 0.3s;
}
.carousel-dot.active {
  opacity: 1;
  background: var(--accent-1);
  width: 32px;
  border-radius: 5px;
}

/* ===== CONTACT ===== */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  padding: 48px;
}
.form-group { margin-bottom: 24px; }
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-primary);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px;
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  transition: 0.3s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.error-msg {
  color: #ef4444;
  font-size: 0.875rem;
  margin-top: 4px;
  display: block;
  min-height: 20px;
}
.form-success {
  display: none;
  padding: 16px;
  background: #10b981;
  color: white;
  border-radius: 12px;
  text-align: center;
  margin-top: 16px;
}
.form-success.show { display: block; }

/* ===== FOOTER ===== */
footer {
  background: var(--bg-secondary);
  padding: 60px 0 20px;
  border-top: 1px solid var(--glass-border);
}
.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 32px;
}
.footer-brand p {
  color: var(--text-secondary);
  margin-top: 8px;
}
.social-links {
  display: flex;
  gap: 24px;
}
.social-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: 0.3s;
}
.social-links a:hover { color: var(--accent-1); }
.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .menu-toggle { display: block; }
  section { padding: 60px 0; }
  .hero { min-height: 80vh; }
  .project-grid,
  .service-grid,
  .features-grid { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; text-align: center; }
}

/* ===== TILT EFFECT ===== */
.tilt {
  transform-style: preserve-3d;
  transition: transform 0.3s;
}