:root {
  /* Core Colors - Clean Light Mode with Tech Accents */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent-primary: #0ea5e9;
  --accent-secondary: #2563eb;
  --gradient-tech: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(15, 23, 42, 0.1);
  --transition-speed: 0.3s;
}

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

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

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

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

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

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 5%;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-speed);
}

header.scrolled {
  padding: 1rem 5%;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  font-family: 'Outfit', sans-serif;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  font-size: 1rem;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background: var(--gradient-tech);
  transition: width var(--transition-speed);
}

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

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

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--gradient-tech);
  color: #fff;
  border-radius: 30px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 240, 255, 0.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
}

.btn-outline:hover {
  background: rgba(0, 240, 255, 0.1);
  box-shadow: 0 4px 15px rgba(0, 240, 255, 0.2);
}

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

.hamburger div {
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  transition: all 0.3s;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 5%;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, rgba(248, 250, 252, 0) 70%);
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  z-index: 1;
}

.hero h1 {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-btns {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Sections */
section {
  padding: 5rem 5%;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

/* Cards (Services) */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: 20px;
  border: 1px solid var(--glass-border);
  transition: transform var(--transition-speed), border-color var(--transition-speed);
}

.card:hover {
  transform: translateY(-10px);
  border-color: var(--accent-primary);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card p {
  color: var(--text-secondary);
}

/* Footer */
footer {
  background: var(--bg-secondary);
  padding: 3rem 5% 1.5rem;
  border-top: 1px solid var(--glass-border);
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto 2rem auto;
}

.footer-col h4 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--accent-primary);
}

.footer-col p, .footer-col ul li {
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.footer-col ul li a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.appear {
  opacity: 1;
  transform: translateY(0);
}

/* Media Queries */
@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 2rem 5%;
    gap: 1.5rem;
    transform: translateY(-150%);
    opacity: 0;
    transition: all 0.4s ease-in-out;
    z-index: 999;
    border-bottom: 1px solid var(--glass-border);
  }

  .nav-links.nav-active {
    transform: translateY(0);
    opacity: 1;
  }

  .hamburger {
    display: flex;
  }

  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero-btns {
    flex-direction: column;
  }
}