/* Буккросинг — тема v2 */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
    --primary: #1e3a5f;
    --primary-dark: #152a45;
    --primary-light: #3d6a9e;
    --accent: #e8a838;
    --accent-dark: #c48a1f;
    --secondary: #2d8f6f;
    --bg-primary: #1e3a5f;
    --bg-secondary: #2d5a87;
    --gradient-primary: linear-gradient(135deg, #1e3a5f 0%, #2d8f6f 100%);
    --gradient-accent: linear-gradient(135deg, #e8a838 0%, #f0c060 100%);
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --card-bg: rgba(30, 41, 59, 0.95);
}

body {
    font-family: 'Manrope', 'Segoe UI', system-ui, sans-serif !important;
    background: linear-gradient(160deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, #1a4d6e 100%) !important;
    background-attachment: fixed;
}

.header {
    padding: 28px 24px !important;
    border-radius: var(--radius-xl) !important;
}

.header-compact .school-name {
    font-size: 2rem !important;
}

.header-compact .library-subtitle {
    font-size: 1.05rem !important;
}

/* Верхняя навигация */
.top-nav {
    position: sticky;
    top: 0;
    z-index: 900;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: 24px;
    border: 1px solid var(--border-light);
    padding: 10px 16px;
}

.top-nav.hidden {
    display: none;
}

.top-nav-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    max-width: 1200px;
    margin: 0 auto;
}

.top-nav-brand {
    font-weight: 800;
    font-size: 1rem;
    color: var(--primary);
    margin-right: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border: none;
    background: transparent;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.top-nav-link:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.top-nav-link.active {
    background: var(--primary);
    color: white;
}

.top-nav-user {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0 8px;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Гостевая страница */
.guest-hero {
    background: var(--card-bg);
    border-radius: var(--radius-2xl);
    padding: 48px 32px;
    text-align: center;
    margin-bottom: 32px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
}

.guest-hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 12px;
}

.guest-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin: 36px 0;
    text-align: left;
}

.guest-step {
    padding: 24px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border-left: 4px solid var(--accent);
}

.guest-step-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 8px;
}

/* Секции меню */
.nav-section-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin: 24px 0 12px 4px;
    grid-column: 1 / -1;
}

.main-nav {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)) !important;
    gap: 16px !important;
}

.nav-card {
    border-radius: var(--radius-xl) !important;
    padding: 24px !important;
}

.nav-card h3 {
    font-size: 1.1rem !important;
}

/* Поиск и фильтры */
.search-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    align-items: center;
}

[data-theme="dark"] .search-panel {
    background: var(--gray-100);
}

.search-input-wrap {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.search-input-wrap i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

.search-input-wrap input {
    width: 100%;
    padding: 12px 12px 12px 42px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-primary);
}

.filter-select {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    background: var(--card-bg);
    color: var(--text-primary);
    font-weight: 500;
    min-width: 140px;
}

/* Пагинация */
.pagination {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-right: 12px;
}

.page-btn {
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.page-btn:hover:not(:disabled) {
    border-color: var(--primary);
    color: var(--primary);
}

.page-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Карточка книги v2 */
.book-card-v2 {
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    cursor: pointer;
    min-width: 0;
    height: 100%;
}

.book-card-v2:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.book-card-v2.status-available {
    border-top: 4px solid var(--success);
}

.book-card-v2.status-taken {
    border-top: 4px solid var(--warning);
}

.book-cover-wrap {
    height: 160px;
    background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.book-cover-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 1;
}

.book-cover-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    opacity: 0.35;
    z-index: 0;
}

.book-card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-card-body .book-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-desc-clamp {
    color: var(--text-secondary);
    font-size: 0.88rem;
    margin: 10px 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.book-card-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
}

.book-card-actions .btn {
    width: 100%;
}

.stars-inline {
    color: var(--accent);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

/* Скелетон */
.skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.skeleton-card {
    height: 380px;
    border-radius: var(--radius-xl);
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.2s infinite;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Детали книги */
.book-detail-modal .modal-content {
    max-width: 640px;
}

.book-detail-header {
    display: flex;
    gap: 24px;
    margin-bottom: 24px;
}

.book-detail-cover {
    width: 140px;
    height: 200px;
    flex-shrink: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-detail-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Лидерборд */
.leaderboard-list {
    list-style: none;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    border-bottom: 1px solid var(--border-light);
    flex-wrap: wrap;
}

.leaderboard-rank {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
}

.leaderboard-rank.medal {
    background: transparent;
    width: auto;
    height: auto;
}

.leaderboard-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.85em;
    font-weight: 600;
    color: var(--text-secondary);
}

.leaderboard-stats span {
    background: var(--gray-50);
    padding: 4px 10px;
    border-radius: 20px;
}

[data-theme="dark"] .leaderboard-stats span {
    background: var(--gray-100);
}

.leaderboard-score {
    font-size: 1.25em;
    font-weight: 800;
    color: var(--primary);
    min-width: 48px;
    text-align: center;
}

.leaderboard-me {
    background: rgba(232, 168, 56, 0.08);
}

@media (max-width: 600px) {
    .leaderboard-item {
        flex-direction: column;
        align-items: flex-start;
    }
    .leaderboard-stats {
        width: 100%;
    }
    .leaderboard-score {
        align-self: flex-end;
    }
}

/* Выбор книги */
.book-picker-list {
    max-height: 360px;
    overflow-y: auto;
    margin: 16px 0;
}

.book-picker-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.book-picker-item:hover {
    background: var(--gray-50);
    border-color: var(--primary-light);
}

.book-picker-item.selected {
    background: rgba(30, 58, 95, 0.1);
    border-color: var(--primary);
}

.theme-toggle {
    top: auto !important;
    bottom: 24px !important;
    right: 24px !important;
}

.notification-container {
    top: 90px !important;
}

.btn-primary {
    background: var(--primary) !important;
}

.sort-btn.active {
    background: var(--primary) !important;
}

@media (max-width: 768px) {
    .top-nav-inner {
        justify-content: center;
    }
    .top-nav-brand {
        width: 100%;
        justify-content: center;
        margin-bottom: 4px;
    }
    .book-detail-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}