:root {
    /* Цветова палитра - Cyber/Secure Theme */
    --bg-dark: #0f172a;
    --bg-surface: #1e293b;
    --bg-card: #334155;
    
    --primary: #3b82f6;      /* Blue 500 */
    --primary-glow: rgba(59, 130, 246, 0.5);
    
    --accent: #06b6d4;       /* Cyan 500 */
    --success: #10b981;      /* Emerald 500 */
    --warning: #f59e0b;      /* Amber 500 */
    --danger: #ef4444;       /* Red 500 */
    
    --text-main: #f8fafc;    /* Slate 50 */
    --text-muted: #94a3b8;   /* Slate 400 */
    
    --border: #475569;
    --glass: rgba(30, 41, 59, 0.7);
    
    --font-heading: 'Outfit', -apple-system, sans-serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    
    --container: 1200px;
    --header-height: 80px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

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

/* Container Utility */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-family: var(--font-heading);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: 0 0 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px var(--primary-glow);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: rgba(59, 130, 246, 0.1);
    color: white;
    border-color: var(--accent);
}

/* Cards & Glassmorphism */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border-color: var(--primary);
}

.glass-panel {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Utilities */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.text-muted { color: var(--text-muted); }

/* Animation Classes */
.animate-fade-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.6s forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }