:root {
    --primary: #4f46e5;
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #2dd4bf 100%);
    --bg-dark: #0f172a;
    --text-glass: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.6);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

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

/* Typography */
h1, h2, h3 {
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

/* Layout utilities */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 0;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: 1rem; }
.gap-8 { gap: 2rem; }
.text-center { text-align: center; }

@media (min-width: 768px) {
    .md-flex-row { flex-direction: row; }
    .md-text-left { text-align: left; }
    h1 { font-size: 4.5rem; }
}

/* Components */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 9999px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s, opacity 0.2s;
}

.btn:active { transform: scale(0.98); }
.btn:hover { opacity: 0.9; }

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 10px 25px -5px rgba(79, 70, 229, 0.4);
}

.btn-outline {
    border: 1px solid var(--glass-border);
    color: white;
}

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 2rem;
    backdrop-filter: blur(12px);
}

/* Hero Section */
.hero {
    min-height: 80vh;
    position: relative;
    padding-top: 4rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 80vw;
    height: 80vw;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.3) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

/* Features Grid */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .grid { grid-template-columns: repeat(3, 1fr); }
}

.feature-card {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
}

.icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: block;
}

/* Footer */
footer {
    border-top: 1px solid var(--glass-border);
    margin-top: 4rem;
    color: var(--text-muted);
}