:root {
  --bg: #060d1d;
  --surface: #0d1c31;
  --surface-soft: #14263f;
  --primary: #f3f7ff;
  --accent: #4edbbc;
  --accent-hover: #3fb19f;
  --accent-blue: #2f6fff;
  --text: #dbe5f4;
  --muted: #9fb2cc;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 24px 48px rgba(3, 10, 24, 0.42);
  --shadow-lg: 0 30px 60px rgba(3, 10, 24, 0.5);
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

html, body {
  height: 100%;
  overflow-x: hidden;
}

body {
  font-family: 'Inter', 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  background: radial-gradient(circle at 15% 20%, rgba(47, 111, 255, 0.18), transparent 60%), 
              radial-gradient(circle at 80% 10%, rgba(78, 219, 188, 0.14), transparent 58%), 
              var(--bg);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
  padding: 20px;
  position: relative;
  z-index: 1;
}

/* Header */
header.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

header.site-header.scrolled {
  background: rgba(6, 13, 29, 0.95);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.4rem;
  color: #ffffff;
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: var(--transition);
}

.brand:hover {
  transform: translateY(-2px);
}

.brand img {
  width: clamp(45px, 4vw, 70px);
  height: auto;
  filter: drop-shadow(0 0 8px rgba(78, 219, 188, 0.4));
  transition: var(--transition);
}

.brand:hover img {
  filter: drop-shadow(0 0 12px rgba(78, 219, 188, 0.6));
}

.brand-text {
  display: inline-block;
  color: #ffffff;
}

.brand-accent {
  color: var(--accent-blue);
}

nav.site-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 10px 24px rgba(2, 8, 20, 0.35);
  backdrop-filter: blur(10px);
}

nav.site-nav a {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  font-size: 0.95rem;
}

nav.site-nav a:hover,
nav.site-nav a:focus {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
}

main {
  padding-top: 80px;
  position: relative;
}

section {
  padding: 4rem 0;
  position: relative;
}

.section-heading {
  text-align: center;
  margin-bottom: 3.5rem;
  position: relative;
}

.section-heading span {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  background: rgba(78, 219, 188, 0.12);
  padding: 0.6rem 1.3rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(78, 219, 188, 0.25);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 15px rgba(78, 219, 188, 0.2); }
  50% { box-shadow: 0 0 25px rgba(78, 219, 188, 0.4); }
}

.section-heading h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  color: var(--primary);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  font-weight: 800;
  line-height: 1.2;
}

.section-heading p {
  max-width: 700px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.7;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: none;
  transition: var(--transition);
  cursor: pointer;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-blue) 100%);
  color: #fff;
  box-shadow: 0 12px 28px rgba(78, 219, 188, 0.35);
  font-weight: 700;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-hover) 0%, #2763e6 100%);
  opacity: 0;
  transition: var(--transition);
}

.btn-primary:hover,
.btn-primary:focus {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 16px 35px rgba(78, 219, 188, 0.45);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary span {
  position: relative;
  z-index: 1;
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 2px solid rgba(255, 255, 255, 0.25);
}

.btn-ghost:hover,
.btn-ghost:focus {
  border-color: var(--accent);
  background: rgba(78, 219, 188, 0.1);
  transform: translateY(-2px);
}

/* Card styles */
.card {
  background: rgba(13, 28, 49, 0.7);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(78, 219, 188, 0.05) 0%, rgba(47, 111, 255, 0.05) 100%);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(78, 219, 188, 0.25);
}

.card:hover::before {
  opacity: 1;
}

/* Footer */
footer {
  background: rgba(6, 26, 54, 0.95);
  color: rgba(255, 255, 255, 0.85);
  padding: 5rem 0 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-blue), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-grid h3 {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: #ffffff;
  font-weight: 700;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.95rem;
  line-height: 1.8;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: 0.8rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-links a:hover {
  color: var(--accent);
  transform: translateX(5px);
}

.contact-info li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.8rem;
}

.contact-info i {
  color: var(--accent);
  font-size: 1.1rem;
}

.copyright {
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
}

/* Scroll animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.scale-in {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Responsive */
@media (max-width: 960px) {
  nav.site-nav {
    position: fixed;
    inset: 0 0 auto auto;
    height: 100vh;
    width: min(280px, 75%);
    background: rgba(6, 13, 29, 0.98);
    backdrop-filter: blur(20px);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: -20px 0 50px rgba(0, 0, 0, 0.5);
    transform: translateX(100%);
    transition: var(--transition);
    padding: 6rem 2rem 2rem;
  }

  nav.site-nav.open {
    transform: translateX(0);
  }

  nav.site-nav ul {
    flex-direction: column;
    gap: 1rem;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
  }

  nav.site-nav a {
    width: 100%;
    padding: 1rem 1.5rem;
  }

  .menu-toggle {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 15px;
  }

  section {
    padding: 3rem 0;
  }

  nav.site-nav {
    width: 100%;
  }
}