:root {
  --bg: #09090b;
  --card-bg: #18181b;
  --card-elevated: #27272a;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-primary: #06b6d4;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
  --border: #3f3f46;
  --border-hover: #52525b;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow: 0 10px 40px -10px rgba(0,0,0,0.4);
  --shadow-hover: 0 20px 40px -10px rgba(0,0,0,0.5);
  --glass: rgba(24, 24, 27, 0.8);
}

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

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 72px;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  padding: 120px 0 80px;
  text-align: center;
}

.hero-title {
  font-size: 64px;
  line-height: 1.1;
  margin-bottom: 24px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-size: 15px;
  gap: 8px;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

.btn-secondary {
  background: var(--card-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
  border-color: var(--text-muted);
}

/* Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
  margin-top: 60px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--card-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: 8px;
}

.card-title {
  font-size: 20px;
}

.card-description {
  color: var(--text-secondary);
  font-size: 16px;
}

/* Placeholders */
.placeholder-icon {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.logo {
  font-size: 24px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(6, 182, 212, 0.2);
  width: fit-content;
}

/* Footer */
.footer {
  margin-top: 120px;
  padding: 60px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
}