/* Bright Theme (Light Mode) - includes base styles, theme variables, and dark mode overrides */

/* ── Base Styles (shared between themes) ── */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* ── Theme Variables ── */

/* Default: Bright (Light) theme */
:root {
    --bg-color: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #dddddd;
    --card-bg: #fafafa;
    --header-bg: #f0f0f0;
    --input-bg: #ffffff;
    --primary-color: #007bff;
    --primary-text: #ffffff;
    --secondary-color: #6c757d;
    --secondary-text: #ffffff;
    --toggle-bg: #f0f0f0;
}

/* Dark theme overrides */
body.theme-dark {
    --bg-color: #121212;
    --text-primary: #e0e0e0;
    --text-secondary: #999999;
    --border-color: #333333;
    --card-bg: #1e1e1e;
    --header-bg: #2a2a2a;
    --input-bg: #1e1e1e;
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --toggle-bg: #2a2a2a;
}

/* ── Body Background & Text ── */
body.theme-bright {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

body.theme-dark {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

/* ── Header ── */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--header-bg);
}

.header h1 {
    font-size: 1.5rem;
}

/* Logo link */
.logo-link {
    color: inherit;
    text-decoration: none;
}

.logo-link:hover {
    opacity: 0.8;
}

.header-controls {
    display: flex;
    gap: 1rem;
}

/* Theme Toggle */
.theme-toggle {
    background: var(--toggle-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* Login Button */
.login-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.4rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--header-bg);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    cursor: pointer;
    transition: opacity 0.2s;
}

.login-btn:hover {
    opacity: 0.8;
}

/* ── Main Content ── */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* ── Controls ── */
.controls {
    margin-bottom: 2rem;
}

.search-form, .search-input, .view-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.view-controls {
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.search-group {
    display: flex;
    gap: 0.5rem;
    flex: 1;
}

.search-input {
    flex: 1;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background: var(--input-bg);
    color: var(--text-primary);
}

.mode-select, .sort-select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg);
    cursor: pointer;
    color: var(--text-primary);
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--primary-text);
}

.btn-secondary {
    background: var(--secondary-color);
    color: var(--secondary-text);
}

.btn-danger {
    background: #dc3545;
    color: #fff;
}

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
}

.sort-controls {
    align-items: center;
}

.sort-order-btn {
    background: var(--secondary-color);
    color: var(--secondary-text);
    border: 1px solid var(--border-color);
}

/* ── Books Grid ── */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.book-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    background: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

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

.book-cover {
    width: 100%;
    max-width: 140px;
    height: 200px;
    object-fit: cover;
    margin: 0 auto 1rem;
    border-radius: 4px;
}

.book-cover-placeholder {
    width: 100%;
    max-width: 140px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0 auto 1rem;
    border-radius: 4px;
    border: 1px dashed var(--border-color);
}

.book-info h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.book-author {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.book-details {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.book-publisher {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* ── View Toggle ── */
.view-toggle {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.view-btn {
    padding: 0.3rem 0.7rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.view-btn:hover {
    background: var(--header-bg);
}

.view-btn.active {
    background: var(--primary-color);
    color: var(--primary-text);
}

/* ── Books List (compact list view) ── */
.books-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.book-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--card-bg);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.book-list-info {
    flex: 1;
}

.book-list-info .book-title {
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.book-list-info .book-author {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.book-list-info .book-details {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.book-list-isbn {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    margin-left: 1rem;
}

/* ── Pagination ── */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.pagination a, .current-page {
    padding: 0.35rem 0.75rem;
    text-decoration: none;
    border-radius: 4px;
    color: var(--text-primary);
}

.current-page {
    background: var(--primary-color);
    color: var(--primary-text);
    font-weight: bold;
}

/* ── Admin Styles ── */
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.admin-auth-wrapper {
    display: flex;
    justify-content: center;
    padding: 3rem 1rem;
}

.admin-auth-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    min-width: 320px;
}

.admin-auth-card h2 {
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--text-primary);
}

.admin-search-form {
    margin-bottom: 1rem;
}

.admin-search-form input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--text-primary);
}

.admin-books-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.admin-books-table th,
.admin-books-table td {
    padding: 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-primary);
}

.admin-books-table th {
    background: var(--header-bg);
    font-weight: 600;
}

/* ── Form Styles ── */
form label {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--text-primary);
}

/* ISBN Input Group */
.isbn-input-group {
    display: flex;
    gap: 0.5rem;
}

.isbn-input-group input {
    flex: 1;
}

/* Mode Toggle */
.mode-toggle {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.mode-toggle label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: normal;
    color: var(--text-primary);
}

.mode-toggle input[type="radio"] {
    cursor: pointer;
}

.full-width {
    width: 100%;
}

/* ── Flash Messages ── */
.flash-messages {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
}

.flash {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    animation: fadeOut 5s forwards;
}

.flash.success { background: #d4edda; color: #155724; }
.flash.error { background: #f8d7da; color: #721c24; }
.flash.info { background: #d1ecf1; color: #0c5460; }

@keyframes fadeOut {
    0% { opacity: 1; }
    80% { opacity: 1; }
    100% { opacity: 0; display: none; }
}

/* ── Empty State ── */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.page-info {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ── Footer ── */
.footer {
    text-align: center;
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
    background-color: var(--header-bg);
}

/* ── Modal ── */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    max-width: 90%;
    max-height: 90%;
    position: relative;
    text-align: center;
}

.modal-close {
    position: absolute;
    top: 0.5rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.scanner-status {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    .search-form, .view-controls {
        flex-direction: column;
    }
    .admin-header {
        flex-direction: column;
        gap: 1rem;
    }
}