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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 60px 40px;
    text-align: center;
}

.logo {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    font-weight: 300;
}

main {
    padding: 60px 40px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.project-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.project-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.project-card h2 {
    font-size: 1.75rem;
    color: var(--text-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.project-description {
    color: #6b7280;
    margin-bottom: 25px;
    line-height: 1.6;
    font-size: 1rem;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
}

footer {
    background: var(--bg-color);
    padding: 30px;
    text-align: center;
    color: #6b7280;
    border-top: 1px solid var(--border-color);
}

/* Страница проекта */
.project-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

.project-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: white;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s;
}

.back-link:hover {
    opacity: 1;
}

.project-content {
    padding: 40px;
    max-width: 800px;
    margin: 0 auto;
}

.project-info {
    background: var(--bg-color);
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    border-left: 4px solid var(--primary-color);
}

.project-info h2 {
    color: var(--text-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.project-info p {
    color: #6b7280;
    line-height: 1.8;
    margin-bottom: 15px;
}

.project-link {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 30px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.project-link:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.feature h3 {
    color: var(--text-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.feature p {
    color: #6b7280;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .logo {
        font-size: 2.5rem;
    }

    main {
        padding: 40px 20px;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .project-content {
        padding: 20px;
    }
}