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

:root {
  --bg: #0a0a0f;
  --text: #e8e8f0;
  --accent: #7c9cff;
  --card: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.1);
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow: hidden;
}

.bg-video {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  z-index: -2;
}

.bg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(10, 10, 15, 0.65);
  z-index: -1;
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 3rem;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(10, 10, 15, 0.6);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 400;
  font-size: 0.95rem;
  opacity: 0.7;
  transition: opacity 0.3s, color 0.3s;
}

.nav a:hover,
.nav a.active {
  opacity: 1;
  color: var(--accent);
}

main {
  position: relative;
  height: 100vh;
  width: 100%;
}

.section {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem 2rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(30px);
  transition: opacity 0.5s ease, transform 0.5s ease, visibility 0.5s;
}

.section.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.content {
  max-width: 720px;
  width: 100%;
  text-align: center;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

h1 span {
  color: var(--accent);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  margin-bottom: 2.5rem;
  letter-spacing: -0.02em;
}

p {
  font-size: 1.15rem;
  opacity: 0.8;
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.card-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1rem;
  font-weight: 500;
  transition: transform 0.3s, background 0.3s, border-color 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  background: rgba(124, 156, 255, 0.1);
  border-color: var(--accent);
}

.contact-info p {
  font-size: 1.2rem;
  margin-bottom: 1.25rem;
}

.contact-info a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.3s;
}

.contact-info a:hover {
  opacity: 0.8;
}

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

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

.section.active .delay-1 { transition-delay: 0.1s; }
.section.active .delay-2 { transition-delay: 0.2s; }
.section.active .delay-3 { transition-delay: 0.3s; }
.section.active .delay-4 { transition-delay: 0.4s; }

@media (max-width: 600px) {
  .nav {
    padding: 1rem 1.25rem;
    flex-direction: column;
    gap: 0.75rem;
  }
  .nav ul {
    gap: 1.25rem;
  }
  .card-list {
    grid-template-columns: 1fr 1fr;
  }
}