/* Общие стили */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --gradient-primary: linear-gradient(135deg, var(--primary-color), #1a252f);
    --gradient-secondary: linear-gradient(135deg, var(--secondary-color), #2980b9);
}

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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(52, 152, 219, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(44, 62, 80, 0.05) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Шапка */
header {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 100px 0;
    text-align: center;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(45deg, rgba(255,255,255,0.1) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255,255,255,0.1) 25%, transparent 25%);
    background-size: 60px 60px;
    opacity: 0.1;
    animation: headerPattern 20s linear infinite;
}

@keyframes headerPattern {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 60px 60px;
    }
}

header h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    display: inline-block;
}

header h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 3px;
}

.subtitle {
    font-size: 1.6rem;
    opacity: 0.9;
    font-weight: 300;
    margin-top: 20px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Социальные сети */
.social-links {
    background-color: var(--white);
    padding: 60px 0;
    text-align: center;
}

.social-links h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-color);
    font-size: 2.2rem;
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin: 0 auto;
    padding: 0 20px;
    max-width: 1000px;
}

.social-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    background-color: var(--light-bg);
    border-radius: 15px;
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.social-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.social-card i {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.social-card span {
    font-size: 1.1rem;
    font-weight: 500;
}

/* Подвал */
footer {
    background: linear-gradient(135deg, var(--primary-color), #1a252f);
    color: var(--white);
    text-align: center;
    padding: 30px 0;
}

/* Медиа-запросы для адаптивности */
@media (max-width: 768px) {
    header {
        padding: 80px 0;
    }

    header h1 {
        font-size: 2.8rem;
    }

    header h1::after {
        width: 80px;
    }

    .subtitle {
        font-size: 1.3rem;
    }

    .social-links {
        padding: 40px 0;
    }

    .social-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        padding: 0 15px;
    }

    .social-card {
        padding: 20px;
    }

    .social-card i {
        font-size: 2rem;
        margin-bottom: 10px;
    }

    .social-card span {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2.2rem;
    }

    header h1::after {
        width: 60px;
    }

    .subtitle {
        font-size: 1.1rem;
    }

    .social-links {
        padding: 30px 0;
    }

    .social-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 10px;
    }

    .social-card {
        padding: 15px;
    }

    .social-card i {
        font-size: 1.8rem;
        margin-bottom: 8px;
    }

    .social-card span {
        font-size: 0.9rem;
    }
}