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

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #e02130;
    --accent-color: #0066cc;
    --text-color: #333;
    --light-bg: #f5f5f5;
    --white: #ffffff;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--white);
}

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

/* Header */
header {
    background: var(--primary-color);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--white);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    flex-wrap: wrap;
}

nav a {
    color: var(--white);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background 0.3s;
}

nav a:hover,
nav a.active {
    background: var(--secondary-color);
}

.search-container {
    display: flex;
    gap: 0.5rem;
}

.search-container input {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    min-width: 250px;
}

.search-container button {
    padding: 0.5rem 1.5rem;
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: opacity 0.3s;
}

.search-container button:hover {
    opacity: 0.9;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #333 100%);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.lead {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* Quick Search */
.quick-search {
    padding: 3rem 0;
    background: var(--light-bg);
}

.quick-search h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    gap: 1rem;
}

.search-box input {
    flex: 1;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
}

.search-box button {
    padding: 1rem 2rem;
    background: var(--accent-color);
    color: var(--white);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: opacity 0.3s;
}

.search-box button:hover {
    opacity: 0.9;
}

/* Categories Grid */
.error-categories {
    padding: 4rem 0;
}

.error-categories h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    color: var(--primary-color);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.category-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.category-card h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.category-card p {
    color: #666;
    margin-bottom: 1.5rem;
}

.error-examples {
    list-style: none;
    margin-bottom: 1.5rem;
}

.error-examples li {
    margin-bottom: 0.5rem;
}

.error-examples a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s;
}

.error-examples a:hover {
    color: var(--secondary-color);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    transition: opacity 0.3s;
}

.btn:hover {
    opacity: 0.9;
}

.btn-secondary {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--secondary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    transition: opacity 0.3s;
}

.btn-secondary:hover {
    opacity: 0.9;
}

/* Systems Section */
.systems {
    padding: 4rem 0;
    background: var(--light-bg);
}

.systems h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    color: var(--primary-color);
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.system-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.system-card:hover {
    transform: translateY(-3px);
}

.system-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.system-card p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Models Section */
.models {
    padding: 4rem 0;
}

.models h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    color: var(--primary-color);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.model-card {
    background: var(--white);
    border: 2px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    transition: border-color 0.3s, transform 0.3s;
}

.model-card:hover {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.model-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.model-card p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.model-card a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

/* FAQ Section */
.faq {
    padding: 4rem 0;
    background: var(--light-bg);
}

.faq h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    color: var(--primary-color);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    padding: 2rem;
    margin-bottom: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.faq-item h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.faq-item p {
    color: #666;
    line-height: 1.8;
}

/* Error Page Styles */
.error-detail {
    padding: 3rem 0;
}

.error-header {
    background: var(--primary-color);
    color: var(--white);
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.error-code {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.error-title {
    font-size: 1.5rem;
}

.breadcrumbs {
    padding: 1rem 0;
    background: var(--light-bg);
}

.breadcrumbs ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
}

.breadcrumbs a {
    color: var(--accent-color);
    text-decoration: none;
}

.breadcrumbs span {
    color: #999;
}

.error-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.main-content {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.sidebar {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 10px;
    height: fit-content;
}

.info-box {
    background: #e3f2fd;
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 5px;
}

.warning-box {
    background: #fff3e0;
    border-left: 4px solid #ff9800;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 5px;
}

.success-box {
    background: #e8f5e9;
    border-left: 4px solid #4caf50;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 5px;
}

.related-links h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.related-links ul {
    list-style: none;
}

.related-links li {
    margin-bottom: 0.5rem;
}

.related-links a {
    color: var(--accent-color);
    text-decoration: none;
}

.related-links a:hover {
    color: var(--secondary-color);
}

/* Error List Styles */
.error-list {
    padding: 3rem 0;
}

.error-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.error-item {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.error-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.error-item h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.error-item p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.error-item a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

/* Footer */
footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-section a:hover {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 968px) {
    header .container {
        flex-direction: column;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }

    .search-container {
        width: 100%;
    }

    .search-container input {
        flex: 1;
        min-width: auto;
    }

    .error-content {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .search-box {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .categories-grid,
    .systems-grid,
    .models-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Table Styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

table th,
table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background: var(--light-bg);
    font-weight: 600;
    color: var(--primary-color);
}

table tr:hover {
    background: var(--light-bg);
}

/* Print Styles */
@media print {
    header,
    footer,
    .search-container,
    .sidebar {
        display: none;
    }

    body {
        font-size: 12pt;
    }
}