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

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --bg-dark: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --text-light: #0f172a;
  --text-muted: #475569;
  --border: rgba(0, 0, 0, 0.1);
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(0, 0, 0, 0.05);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: var(--text-light);
  transition: color 0.3s ease;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  outline: none;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

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

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

.btn-outline:hover {
  background-color: rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  padding: 20px 0;
  transition: all 0.3s ease;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(to right, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links li a {
  font-weight: 500;
  font-size: 1rem;
  padding-bottom: 4px;
  position: relative;
}

.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: width 0.3s ease;
}

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

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-light);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Footer */
footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border);
  padding: 60px 0 20px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-col p {
  color: var(--text-muted);
  margin-bottom: 15px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 5px;
}

.social-icons {
  display: flex;
  gap: 15px;
}

.social-icons a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--text-light);
  transition: all 0.3s ease;
}

.social-icons a:hover {
  background: var(--primary);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Utilities */
.section-spacing { padding: 60px 0; }
.mt-40 { margin-top: 40px; }
.mt-20 { margin-top: 20px; }
.pt-0 { padding-top: 0 !important; }
.text-center { text-align: center; }

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

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

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--bg-dark);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: left 0.3s ease;
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .mobile-menu-btn {
    display: block;
  }
}