/*
 * Переопределение переменных Bootstrap 5
 * Поддержка светлой и темной темы
 * FontAwesome 5 Pro Icons
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============ СВЕТЛАЯ ТЕМА (ПО УМОЛЧАНИЮ) ============ */
:root,
[data-bs-theme="light"] {
    /* Основные цвета Bootstrap */
    --bs-primary: #3b82f6;
    --bs-primary-rgb: 59, 130, 246;
    --bs-primary-dark: #2563eb;
    --bs-primary-light: #60a5fa;

    --bs-secondary: #64748b;
    --bs-secondary-rgb: 100, 116, 139;

    --bs-success: #10b981;
    --bs-success-rgb: 16, 185, 129;

    --bs-danger: #ef4444;
    --bs-danger-rgb: 239, 68, 68;

    --bs-warning: #f59e0b;
    --bs-warning-rgb: 245, 158, 11;

    --bs-info: #06b6d4;
    --bs-info-rgb: 6, 182, 212;

    --bs-light: #f8fafc;
    --bs-light-rgb: 248, 250, 252;

    --bs-dark: #0f172a;
    --bs-dark-rgb: 15, 23, 42;

    --bs-white: #ffffff;
    --bs-black: #000000;

    /* Фоны */
    --bs-body-bg: #f8fafc;
    --bs-body-bg-rgb: 248, 250, 252;
    --bs-body-color: #0f172a;
    --bs-body-color-rgb: 15, 23, 42;
    --bs-secondary-bg: #f1f5f9;
    --bs-tertiary-bg: #e2e8f0;

    /* Акценты */
    --bs-emphasis-color: #0f172a;
    --bs-emphasis-color-rgb: 15, 23, 42;

    /* Ссылки */
    --bs-link-color: #3b82f6;
    --bs-link-color-rgb: 59, 130, 246;
    --bs-link-hover-color: #2563eb;
    --bs-link-hover-color-rgb: 37, 99, 235;

    /* Границы */
    --bs-border-color: #e2e8f0;
    --bs-border-color-translucent: rgba(0, 0, 0, 0.1);

    /* Компоненты */
    --bs-card-bg: #ffffff;
    --bs-card-cap-bg: transparent;
    --bs-card-border-color: #e2e8f0;

    --bs-navbar-bg: #ffffff;
    --bs-navbar-color: #475569;
    --bs-navbar-hover-color: #3b82f6;
    --bs-navbar-active-color: #3b82f6;
    --bs-navbar-brand-color: #3b82f6;

    --bs-dropdown-bg: #ffffff;
    --bs-dropdown-link-color: #0f172a;
    --bs-dropdown-link-hover-bg: #f1f5f9;
    --bs-dropdown-link-hover-color: #0f172a;
    --bs-dropdown-border-color: #e2e8f0;

    --bs-input-bg: #ffffff;
    --bs-input-color: #0f172a;
    --bs-input-border-color: #cbd5e1;
    --bs-input-focus-border-color: #3b82f6;
    --bs-input-placeholder-color: #94a3b8;

    --bs-table-bg: transparent;
    --bs-table-color: #0f172a;
    --bs-table-hover-bg: #f1f5f9;
    --bs-table-striped-bg: #f8fafc;
    --bs-table-border-color: #e2e8f0;

    --bs-modal-bg: #ffffff;
    --bs-modal-border-color: #e2e8f0;

    --bs-pagination-bg: #ffffff;
    --bs-pagination-color: #0f172a;
    --bs-pagination-border-color: #e2e8f0;
    --bs-pagination-hover-bg: #f1f5f9;
    --bs-pagination-hover-color: #0f172a;
    --bs-pagination-active-bg: #3b82f6;
    --bs-pagination-active-color: #ffffff;
    --bs-pagination-disabled-bg: #f1f5f9;
    --bs-pagination-disabled-color: #94a3b8;

    /* Тени */
    --bs-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --bs-box-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --bs-box-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --bs-box-shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.05);

    /* Кастомные переменные */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-danger: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-warning: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
    --gradient-info: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);

    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-hover: #334155;
    --sidebar-active: #3b82f6;

    --footer-bg: #1e293b;
    --footer-text: #ffffff;
    --footer-muted: rgba(255, 255, 255, 0.6);

    --hero-overlay: rgba(255, 255, 255, 0.1);
}

/* ============ ТЕМНАЯ ТЕМА ============ */
[data-bs-theme="dark"] {
    /* Основные цвета */
    --bs-primary: #3b82f6;
    --bs-primary-rgb: 59, 130, 246;
    --bs-primary-dark: #1d4ed8;
    --bs-primary-light: #60a5fa;

    --bs-secondary: #94a3b8;
    --bs-secondary-rgb: 148, 163, 184;

    --bs-body-bg: #0f172a;
    --bs-body-bg-rgb: 15, 23, 42;
    --bs-body-color: #f1f5f9;
    --bs-body-color-rgb: 241, 245, 249;
    --bs-secondary-bg: #1e293b;
    --bs-tertiary-bg: #334155;

    --bs-emphasis-color: #f1f5f9;
    --bs-emphasis-color-rgb: 241, 245, 249;

    --bs-link-color: #60a5fa;
    --bs-link-color-rgb: 96, 165, 250;
    --bs-link-hover-color: #3b82f6;
    --bs-link-hover-color-rgb: 59, 130, 246;

    --bs-border-color: #334155;
    --bs-border-color-translucent: rgba(255, 255, 255, 0.1);

    --bs-card-bg: #1e293b;
    --bs-card-border-color: #334155;

    --bs-navbar-bg: #1e293b;
    --bs-navbar-color: #cbd5e1;
    --bs-navbar-hover-color: #3b82f6;
    --bs-navbar-active-color: #3b82f6;
    --bs-navbar-brand-color: #3b82f6;

    --bs-dropdown-bg: #1e293b;
    --bs-dropdown-link-color: #f1f5f9;
    --bs-dropdown-link-hover-bg: #334155;
    --bs-dropdown-link-hover-color: #f1f5f9;
    --bs-dropdown-border-color: #334155;

    --bs-input-bg: #0f172a;
    --bs-input-color: #f1f5f9;
    --bs-input-border-color: #475569;
    --bs-input-focus-border-color: #3b82f6;
    --bs-input-placeholder-color: #64748b;

    --bs-table-bg: transparent;
    --bs-table-color: #f1f5f9;
    --bs-table-hover-bg: #334155;
    --bs-table-striped-bg: #1e293b;
    --bs-table-border-color: #334155;

    --bs-modal-bg: #1e293b;
    --bs-modal-border-color: #334155;

    --bs-pagination-bg: #1e293b;
    --bs-pagination-color: #f1f5f9;
    --bs-pagination-border-color: #334155;
    --bs-pagination-hover-bg: #334155;
    --bs-pagination-hover-color: #f1f5f9;
    --bs-pagination-active-bg: #3b82f6;
    --bs-pagination-active-color: #ffffff;
    --bs-pagination-disabled-bg: #1e293b;
    --bs-pagination-disabled-color: #64748b;

    --bs-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --bs-box-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --bs-box-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5), 0 4px 6px rgba(0, 0, 0, 0.3);

    --hero-overlay: rgba(0, 0, 0, 0.2);
}

/* ============ БАЗОВЫЕ СТИЛИ ============ */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============ z-index ИСПРАВЛЕНИЯ ============ */
.hero-section {
    position: relative;
    z-index: 1;
}

.hero-section::before {
    z-index: 0;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.search-box {
    position: relative;
    z-index: 3;
}

#quickResults {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 1050 !important;
    max-height: 300px;
    overflow-y: auto;
    background: var(--bs-card-bg);
    border: 1px solid var(--bs-border-color);
    border-radius: 0 0 12px 12px;
    box-shadow: var(--bs-box-shadow-lg);
    margin-top: 4px;
}

#quickResults .list-group-item {
    background: var(--bs-card-bg);
    color: var(--bs-body-color);
    border-color: var(--bs-border-color);
    cursor: pointer;
    padding: 0.75rem 1rem;
    transition: background-color 0.15s ease;
}

#quickResults .list-group-item:hover {
    background: var(--bs-secondary-bg);
}

#quickResults .list-group-item:first-child {
    border-radius: 12px 12px 0 0;
}

#quickResults .list-group-item:last-child {
    border-radius: 0 0 12px 12px;
}

/* ============ НАВБАР ============ */
.navbar {
    --bs-navbar-padding-y: 0.75rem;
    background: var(--bs-navbar-bg) !important;
    border-bottom: 2px solid transparent;
    border-image: var(--gradient-primary);
    border-image-slice: 1;
    box-shadow: var(--bs-box-shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1030;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav-link {
    font-weight: 500;
    border-radius: 8px;
    margin: 0 0.25rem;
    transition: all 0.15s ease;
}

/* ============ КАРТОЧКИ ============ */
.card {
    --bs-card-border-radius: 16px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--bs-box-shadow-lg);
}

/* ============ КНОПКИ ============ */
.btn {
    --bs-btn-border-radius: 8px;
    font-weight: 500;
    transition: all 0.15s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border: none;
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #10b981, #059669);
    border: none;
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669, #047857);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    border: none;
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    color: white;
}

.btn-outline-primary {
    --bs-btn-color: var(--bs-primary);
    --bs-btn-border-color: var(--bs-primary);
    --bs-btn-hover-bg: var(--bs-primary);
    --bs-btn-hover-border-color: var(--bs-primary);
    --bs-btn-hover-color: #fff;
}

.btn-outline-secondary {
    --bs-btn-color: var(--bs-secondary);
    --bs-btn-border-color: var(--bs-border-color);
    --bs-btn-hover-bg: var(--bs-secondary-bg);
    --bs-btn-hover-color: var(--bs-body-color);
}

.btn-lg {
    --bs-btn-padding-y: 0.75rem;
    --bs-btn-padding-x: 1.5rem;
    --bs-btn-font-size: 1.1rem;
    --bs-btn-border-radius: 10px;
}

.btn-sm {
    --bs-btn-padding-y: 0.375rem;
    --bs-btn-padding-x: 0.75rem;
    --bs-btn-font-size: 0.875rem;
}

/* ============ ФОРМЫ ============ */
.form-control,
.form-select {
    --bs-border-radius: 8px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* ============ ТАБЛИЦЫ ============ */
.table thead th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    padding: 1rem;
    border-bottom-width: 2px;
}

.table tbody td {
    padding: 0.875rem 1rem;
    vertical-align: middle;
}

/* ============ АЛЕРТЫ ============ */
.alert {
    --bs-alert-border-radius: 12px;
    border: none;
    font-weight: 500;
}

/* ============ БЕЙДЖИ ============ */
.badge {
    --bs-badge-border-radius: 8px;
    font-weight: 500;
}

/* ============ ПАГИНАЦИЯ ============ */
.pagination {
    --bs-pagination-border-radius: 10px;
    --bs-pagination-padding-y: 0.625rem;
    --bs-pagination-padding-x: 1rem;
}

.page-link {
    margin: 0 3px;
}

/* ============ HERO СЕКЦИЯ ============ */
.hero-section {
    background: var(--gradient-primary);
    padding: 5rem 0;
    position: relative;
    z-index: 1;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.4;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

/* ============ ПОИСК ============ */
.search-box {
    background: var(--bs-card-bg);
    border-radius: 16px;
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    padding: 0.75rem;
    position: relative;
    z-index: 3;
}

.search-box .form-control {
    border: none;
    font-size: 1.1rem;
    padding: 0.75rem 1rem;
    background: transparent;
}

.search-box .form-control:focus {
    box-shadow: none;
}

.search-box .btn {
    padding: 0.75rem 2rem;
    border-radius: 12px;
    font-weight: 600;
}

/* ============ СТАТИСТИКА ============ */
.stat-card {
    background: var(--bs-card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--bs-border-color);
    box-shadow: var(--bs-box-shadow);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--bs-box-shadow-lg);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 1rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--bs-body-color);
    line-height: 1.2;
}

.stat-label {
    color: var(--bs-secondary-color, #94a3b8);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ============ КАРТОЧКИ КНИГ ============ */
.book-card {
    background: var(--bs-card-bg);
    border: 1px solid var(--bs-border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--bs-box-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
}

.book-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--bs-box-shadow-lg);
    border-color: var(--bs-primary);
}

.book-card-body {
    padding: 1.5rem;
}

.book-card .book-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--bs-body-color);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.book-card .book-title a {
    color: var(--bs-body-color);
    text-decoration: none;
}

.book-card .book-title a:hover {
    color: var(--bs-primary);
}

.book-card .book-author {
    color: var(--bs-secondary-color);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.book-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ============ ФИЛЬТРЫ ============ */
.filter-section {
    background: var(--bs-card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--bs-border-color);
    box-shadow: var(--bs-box-shadow);
    margin-bottom: 2rem;
    animation: slideDown 0.3s ease-out;
}

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

/* ============ АДМИН-ПАНЕЛЬ ============ */
.admin-layout {
    display: flex;
    min-height: calc(100vh - 73px);
}

.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 1.5rem 0;
    position: fixed;
    left: 0;
    top: 73px;
    bottom: 0;
    overflow-y: auto;
    z-index: 1020;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 0 1.5rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 1.5rem;
}

.sidebar-header h5 {
    color: #ffffff !important;
}

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

.sidebar-menu li a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all 0.15s ease;
    font-weight: 500;
    gap: 0.75rem;
    border-left: 3px solid transparent;
}

.sidebar-menu li a:hover {
    background: var(--sidebar-hover);
    color: #ffffff;
    border-left-color: var(--bs-primary);
}

.sidebar-menu li a.active {
    background: var(--bs-primary);
    color: #ffffff;
    border-left-color: #ffffff;
}

.sidebar-menu li a i {
    width: 20px;
    text-align: center;
}

.main-content {
    margin-left: 280px;
    flex: 1;
    padding: 2rem;
    background: var(--bs-body-bg);
    min-height: calc(100vh - 73px);
}

/* ============ ТЕМА ============ */
.theme-toggle {
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--bs-border-color);
    background: var(--bs-card-bg);
    color: var(--bs-body-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(15deg);
    border-color: var(--bs-primary);
}

/* ============ КНОПКА ПРОКРУТКИ ============ */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 14px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1040;
    box-shadow: var(--bs-box-shadow-lg);
    transition: all 0.3s ease;
}

.scroll-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.2);
}

/* ============ ФУТЕР ============ */
footer {
    background: var(--footer-bg) !important;
    color: var(--footer-text) !important;
}

footer .text-muted {
    color: var(--footer-muted) !important;
}

/* ============ АНИМАЦИИ ============ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* ============ АДАПТИВНОСТЬ ============ */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
    }

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

    .hero-section {
        padding: 3rem 0;
    }
}

@media (max-width: 767.98px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .search-box .btn {
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 575.98px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .hero-section {
        padding: 2rem 0;
    }
}

/* ============ ПЕЧАТЬ ============ */
@media print {
    .navbar,
    footer,
    .btn,
    .pagination,
    .breadcrumb,
    .search-box,
    .hero-section,
    .alert,
    .sidebar,
    #quickResults,
    .scroll-to-top,
    #themeToggle,
    .dropdown-menu,
    .navbar-toggler {
        display: none !important;
    }

    .card {
        border: 1px solid #ddd !important;
        box-shadow: none !important;
        break-inside: avoid;
    }

    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }

    .main-content {
        margin-left: 0 !important;
        padding: 0 !important;
    }
}