/**
 * Кастомные стили BioGate Theme
 * Построены поверх Bootstrap 5
 */

/* ========== CSS Custom Properties ========== */
:root {
    /* Цветовая палитра */
    --biogate-white: #fefefe;
    --biogate-black: #1a1a1a;
    --biogate-gray-100: #f8f9fa;
    --biogate-gray-200: #e9ecef;
    --biogate-gray-300: #dee2e6;
    --biogate-gray-400: #ced4da;
    --biogate-gray-500: #adb5bd;
    --biogate-gray-600: #6c757d;
    --biogate-gray-700: #495057;
    --biogate-gray-800: #343a40;
    --biogate-gray-900: #212529;
    --biogate-blue: #0066cc;
    --biogate-blue-dark: #004499;
    --biogate-blue-light: #3388dd;
    
    /* Переопределение Bootstrap переменных */
    --bs-body-bg: var(--biogate-white);
    --bs-body-color: var(--biogate-black);
    --bs-primary: var(--biogate-blue);
    --bs-primary-rgb: 0, 102, 204;
    --bs-border-color: var(--biogate-gray-300);
    --bs-secondary: var(--biogate-gray-600);
    --bs-light: var(--biogate-gray-100);
    --bs-dark: var(--biogate-gray-800);
    
    /* Типографика */
    --font-main: 'Inter', Arial, sans-serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
    
    /* Анимации */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.2s ease-in-out;
}

/* ========== Базовая типографика ========== */
body {
    font-family: var(--font-main);
    font-weight: 400;
    line-height: 1.6;
    color: var(--biogate-black);
    background-color: var(--biogate-white);
}

/* Заголовки */
h1, h2 {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--biogate-black);
    line-height: 1.2;
}

h3, h4, h5, h6 {
    font-family: var(--font-main);
    font-weight: 600;
    color: var(--biogate-black);
    line-height: 1.3;
}

/* UI элементы */
.ui-label, .nav-link, .btn, .breadcrumb-item {
    font-family: var(--font-mono);
}

/* ========== Хедер ========== */
.site-header {
    background-color: var(--biogate-white);
    border-bottom: 1px solid var(--biogate-gray-300);
    padding: 1rem 0;
}

.site-logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--biogate-blue);
    text-decoration: none;
    transition: var(--transition-fast);
}

.site-logo:hover {
    color: var(--biogate-blue-dark);
    text-decoration: none;
}

/* Навигация */
.navbar-nav .nav-link {
    color: var(--biogate-gray-700);
    font-weight: 500;
    transition: var(--transition-fast);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--biogate-blue);
}

/* Поиск в хедере */
.header-search {
    max-width: 300px;
}

.header-search .form-control {
    border: 1px solid var(--biogate-gray-300);
    border-radius: 0.375rem;
    padding: 0.5rem 1rem;
    transition: var(--transition-fast);
}

.header-search .form-control:focus {
    border-color: var(--biogate-blue);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

/* Breadcrumbs */
.breadcrumb {
    background-color: transparent;
    padding: 1rem 0;
    margin-bottom: 1rem;
}

.breadcrumb-item {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.breadcrumb-item a {
    color: var(--biogate-gray-600);
    text-decoration: none;
    transition: var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--biogate-blue);
}

.breadcrumb-item.active {
    color: var(--biogate-black);
    font-weight: 600;
}

/* ========== Основной контент ========== */
.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

/* ========== Карточки вопросов ========== */
.question-card {
    border: 1px solid var(--biogate-gray-300);
    border-radius: 0.5rem;
    transition: var(--transition-normal);
    background-color: var(--biogate-white);
    height: 100%;
}

.question-card:hover {
    border-color: var(--biogate-blue);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transform: translateY(-2px);
}

.question-card .card-header {
    background-color: var(--biogate-gray-100);
    border-bottom: 1px solid var(--biogate-gray-300);
    padding: 1rem 1.25rem;
}

.question-number {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--biogate-blue);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.question-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.question-title a {
    color: var(--biogate-black);
    text-decoration: none;
    transition: var(--transition-fast);
}

.question-title a:hover {
    color: var(--biogate-blue);
}

/* ========== Категории и теги ========== */
.category-card {
    border: 1px solid var(--biogate-gray-300);
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: var(--transition-normal);
    background-color: var(--biogate-white);
    height: 100%;
}

.category-card:hover {
    border-color: var(--biogate-blue);
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.075);
}

.category-title {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--biogate-black);
    margin-bottom: 0.75rem;
}

.category-title a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

.category-title a:hover {
    color: var(--biogate-blue);
}

.subcategory-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.subcategory-list li {
    margin-bottom: 0.5rem;
    padding-left: 1rem;
    position: relative;
}

.subcategory-list li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--biogate-gray-500);
    font-family: var(--font-mono);
}

.subcategory-list a {
    color: var(--biogate-gray-700);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.subcategory-list a:hover {
    color: var(--biogate-blue);
}

/* Теги */
.question-tags {
    margin-top: 1rem;
}

.tag-item {
    display: inline-block;
    background-color: var(--biogate-gray-200);
    color: var(--biogate-gray-700);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-decoration: none;
    margin: 0.25rem 0.5rem 0.25rem 0;
    transition: var(--transition-fast);
}

.tag-item:hover {
    background-color: var(--biogate-blue);
    color: var(--biogate-white);
    text-decoration: none;
}

/* ========== Связи между вопросами ========== */
.question-relations {
    background-color: var(--biogate-gray-100);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin: 2rem 0;
}

.relations-title {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--biogate-black);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.relation-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--biogate-gray-300);
}

.relation-item:last-child {
    border-bottom: none;
}

.relation-type {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--biogate-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.relation-question {
    margin-top: 0.25rem;
}

.relation-question a {
    color: var(--biogate-black);
    text-decoration: none;
    transition: var(--transition-fast);
}

.relation-question a:hover {
    color: var(--biogate-blue);
}

/* ========== Кнопки ========== */
.btn {
    font-family: var(--font-mono);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 0.375rem;
    padding: 0.5rem 1rem;
    transition: var(--transition-fast);
}

.btn-primary {
    background-color: var(--biogate-blue);
    border-color: var(--biogate-blue);
    color: var(--biogate-white);
}

.btn-primary:hover {
    background-color: var(--biogate-blue-dark);
    border-color: var(--biogate-blue-dark);
}

.btn-outline-primary {
    color: var(--biogate-blue);
    border-color: var(--biogate-blue);
}

.btn-outline-primary:hover {
    background-color: var(--biogate-blue);
    border-color: var(--biogate-blue);
    color: var(--biogate-white);
}

/* ========== Футер ========== */
.site-footer {
    background-color: var(--biogate-gray-100);
    border-top: 1px solid var(--biogate-gray-300);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content {
    text-align: center;
    color: var(--biogate-gray-600);
    font-size: 0.9rem;
}

/* ========== Адаптивность ========== */
@media (max-width: 768px) {
    .site-header {
        padding: 0.75rem 0;
    }
    
    .header-search {
        max-width: 100%;
        margin-top: 1rem;
    }
    
    .main-content {
        padding: 1rem 0;
    }
    
    .category-card,
    .question-card {
        margin-bottom: 1rem;
    }
    
    .breadcrumb {
        padding: 0.5rem 0;
        margin-bottom: 0.5rem;
    }
    
    .question-relations {
        padding: 1rem;
        margin: 1rem 0;
    }
}

/* ========== Утилиты ========== */
.text-mono {
    font-family: var(--font-mono);
}

.fade-in {
    animation: fadeIn var(--transition-normal) ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Скрытие элементов с анимацией */
.hidden {
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--transition-normal);
}

.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== Главная страница ========== */

/* Категории плитками */
.categories-section .category-card {
    border: 1px solid var(--biogate-gray-300);
    border-radius: 0.75rem;
    transition: var(--transition-normal);
    background-color: var(--biogate-white);
    overflow: hidden;
}

.categories-section .category-card:hover {
    border-color: var(--biogate-blue);
    box-shadow: 0 0.5rem 1rem rgba(0, 102, 204, 0.15);
    transform: translateY(-4px);
}

.category-header {
    border-bottom: 1px solid var(--biogate-gray-200);
}

.category-title .bi-folder {
    color: var(--biogate-blue);
    margin-right: 0.5rem;
}

.subcategory-item {
    padding: 0.25rem 0;
    border-bottom: 1px solid var(--biogate-gray-100);
}

.subcategory-item:last-child {
    border-bottom: none;
}

.subcategory-item .bi-folder-fill {
    font-size: 0.875rem;
}

.sub-subcategories {
    border-left: 2px solid var(--biogate-gray-200);
    padding-left: 0.75rem;
}

.sub-subcategory-item {
    margin-bottom: 0.25rem;
}

.sub-subcategory-item .bi-file-text {
    font-size: 0.75rem;
}

/* Последние вопросы */
.recent-questions-section .question-card {
    transition: var(--transition-normal);
}

.recent-questions-section .question-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
}

.recent-questions-section .card-header {
    border-bottom: 1px solid var(--biogate-gray-200);
}

.question-excerpt {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Статистика */
.stats-section {
    background-color: var(--biogate-gray-100);
    margin: 0 -15px;
    padding: 3rem 15px 2rem;
    border-radius: 1rem;
}

.stat-item {
    padding: 1rem;
}

.stat-number {
    font-family: var(--font-mono);
    font-weight: 700;
}

.stat-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* Адаптивность для главной */
@media (max-width: 768px) {
    .categories-section .category-card {
        margin-bottom: 1.5rem;
    }
    
    .stats-section {
        margin: 0 -10px;
        padding: 2rem 10px 1.5rem;
    }
    
    .stat-number {
        font-size: 1.5rem !important;
    }
}