/* ===== BookBase Styles ===== */

:root {
    --bg: #0f0f0f;
    --bg-card: #1a1a2e;
    --bg-card-hover: #22223a;
    --bg-input: #16213e;
    --text: #e0e0e0;
    --text-muted: #8888a0;
    --accent: #4a9eff;
    --accent-hover: #3a8eee;
    --danger: #e74c3c;
    --success: #2ecc71;
    --warning: #f39c12;
    --border: #2a2a4a;
    --radius: 8px;
    --shadow: 0 2px 12px rgba(0,0,0,0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Navbar ===== */

.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    flex-wrap: wrap;
}
.nav-brand {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text) !important;
    text-decoration: none !important;
}
.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { color: var(--text-muted); font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-logout { color: var(--danger) !important; }
.nav-logout:hover { color: #ff6b6b !important; }

/* ===== Login ===== */

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}
.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    width: 100%;
    max-width: 380px;
    text-align: center;
}
.login-card h1 {
    margin-bottom: 0.25rem;
}
.login-card .form-group {
    text-align: left;
    margin-bottom: 1rem;
}
.login-card input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
}
.login-card input:focus {
    outline: none;
    border-color: var(--accent);
}
.login-error {
    background: rgba(231, 76, 60, 0.15);
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: var(--radius);
    padding: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* ===== Container ===== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
    width: 100%;
}

/* ===== Stats ===== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
}
.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
}
.stat-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Book Grid ===== */

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.25rem;
}
.book-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform 0.15s, box-shadow 0.15s;
    text-decoration: none !important;
    color: var(--text) !important;
    display: flex;
    flex-direction: column;
}
.book-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    background: var(--bg-card-hover);
}
.book-cover {
    width: 100%;
    aspect-ratio: 2/3;
    overflow: hidden;
    background: var(--bg-input);
    display: flex;
    align-items: center;
    justify-content: center;
}
.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.no-cover {
    font-size: 3rem;
    color: var(--text-muted);
}
.no-cover-large { font-size: 6rem; }
.book-info {
    padding: 0.75rem;
    flex: 1;
}
.book-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.book-author {
    color: var(--text-muted);
    font-size: 0.8rem;
}
.book-location {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ===== Badges ===== */

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-top: 0.25rem;
}
.badge-unread { background: var(--border); color: var(--text-muted); }
.badge-reading { background: rgba(243, 156, 18, 0.2); color: var(--warning); }
.badge-read { background: rgba(46, 204, 113, 0.2); color: var(--success); }

.tag {
    display: inline-block;
    background: var(--bg-input);
    color: var(--text-muted);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    margin: 0.15rem;
}

/* ===== Filter Bar ===== */

.filter-bar {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    align-items: center;
}
.filter-bar input, .filter-bar select {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
}
.filter-bar input { flex: 1; min-width: 200px; }

/* ===== Buttons ===== */

.btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.15s;
    text-decoration: none !important;
}
.btn:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: var(--bg-card-hover); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #c0392b; }
.btn-lg { padding: 0.75rem 2rem; font-size: 1rem; }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.8rem; }

/* ===== Pagination ===== */

.pagination {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}
.page-info { color: var(--text-muted); }

/* ===== Book Detail ===== */

.book-detail {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
}
.book-detail-cover img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.book-detail-info h1 { margin-bottom: 0.25rem; }
.book-detail-info h2 { font-weight: 400; margin-bottom: 0.5rem; }
.book-authors { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 1rem; }

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem 2rem;
    margin-bottom: 1rem;
}
.detail-item { display: flex; gap: 0.5rem; }
.detail-label { color: var(--text-muted); min-width: 80px; font-weight: 500; }

.location-box, .personal-box, .notes-box, .description {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
}
.location-box h3, .personal-box h3, .notes-box h3, .description h3 {
    margin-bottom: 0.5rem;
}

.subjects { margin-bottom: 1rem; }

.detail-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}
.detail-meta { margin-top: 1rem; }

/* ===== Tabs ===== */

.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 1.5rem;
}
.tab {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-size: 0.95rem;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    font-weight: 600;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ===== Scanner ===== */

.scanner-box {
    width: 100%;
    max-width: 400px;
    margin: 1rem auto;
    border-radius: var(--radius);
    overflow: hidden;
}
.scan-section { text-align: center; margin-bottom: 1rem; }
.scan-status {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin: 0.75rem 0;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
}
.scan-status-info { background: rgba(74, 158, 255, 0.15); color: var(--accent); border: 1px solid var(--accent); }
.scan-status-success { background: rgba(46, 204, 113, 0.15); color: var(--success); border: 1px solid var(--success); }
.scan-status-error { background: rgba(231, 76, 60, 0.15); color: var(--danger); border: 1px solid var(--danger); }

/* ===== Location Preset ===== */

.location-preset {
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}
.location-preset-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}
.location-preset-fields {
    display: flex;
    gap: 0.75rem;
    align-items: end;
    flex-wrap: wrap;
}
.location-preset-fields .form-group {
    flex: 1;
    min-width: 120px;
}
.location-preset-fields input {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    width: 100%;
}

.divider-text {
    text-align: center;
    color: var(--text-muted);
    margin: 1rem 0;
}

/* ===== Forms ===== */

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.form-group { display: flex; flex-direction: column; gap: 0.25rem; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}
.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}
.form-grid hr { border: none; border-top: 1px solid var(--border); margin: 0.5rem 0; }
.form-grid h4 { color: var(--text-muted); }
.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* ===== Search Results ===== */

.search-results { margin-top: 2rem; }
.results-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}
.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    display: grid;
    grid-template-columns: 60px 1fr auto;
    gap: 0.75rem;
    align-items: start;
    cursor: pointer;
    transition: border-color 0.15s;
}
.result-card:hover { border-color: var(--accent); }
.result-card img {
    width: 60px;
    border-radius: 4px;
}
.result-card .result-info h4 { font-size: 0.9rem; margin-bottom: 0.2rem; }
.result-card .result-info p { font-size: 0.8rem; color: var(--text-muted); }
.result-card .result-source {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* ===== Photo upload ===== */

.file-upload input[type="file"] { display: none; }
.photo-preview {
    margin: 1rem 0;
    max-width: 300px;
}
.photo-preview img {
    width: 100%;
    border-radius: var(--radius);
}
.ocr-info {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-top: 1rem;
}

/* ===== Import ===== */

.import-section, .export-section { margin-bottom: 2rem; }
.csv-example {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.85rem;
}
.csv-example th, .csv-example td {
    border: 1px solid var(--border);
    padding: 0.4rem 0.75rem;
    text-align: left;
}
.csv-example th {
    background: var(--bg-input);
    color: var(--accent);
}

/* ===== Loading ===== */

.loading { text-align: center; padding: 2rem; }
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Toast ===== */

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
    z-index: 1000;
}
.toast.show {
    transform: translateY(0);
    opacity: 1;
}
.toast.error { border-color: var(--danger); }
.toast.success { border-color: var(--success); }

/* ===== Empty State ===== */

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

/* ===== Footer ===== */

.footer {
    text-align: center;
    padding: 1rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

/* ===== Hamburger Menu ===== */

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    margin-left: auto;
    flex-direction: column;
    gap: 5px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Responsive ===== */

@media (max-width: 768px) {
    /* -- Hamburger nav -- */
    .nav-toggle { display: flex; }
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        padding-top: 0.5rem;
    }
    .nav-links.open { display: flex; }
    .nav-links a {
        padding: 0.75rem 0;
        border-top: 1px solid var(--border);
        font-size: 1rem;
    }
    .navbar { padding: 0.5rem 1rem; gap: 0; }

    /* -- Container -- */
    .container { padding: 0.75rem; }
    h1 { font-size: 1.4rem; }
    h2 { font-size: 1.1rem; }

    /* -- Stats -- */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    .stat-card { padding: 1rem; }
    .stat-number { font-size: 1.8rem; }

    /* -- Book grid -- */
    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 0.75rem;
    }
    .book-info { padding: 0.5rem; }
    .book-title { font-size: 0.8rem; }
    .book-author { font-size: 0.7rem; }

    /* -- Book detail -- */
    .book-detail {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .book-detail-cover {
        max-width: 200px;
        margin: 0 auto;
    }
    .detail-grid {
        grid-template-columns: 1fr;
        gap: 0.4rem;
    }
    .detail-actions {
        flex-direction: column;
    }
    .detail-actions .btn {
        width: 100%;
        text-align: center;
    }

    /* -- Forms -- */
    .form-grid { grid-template-columns: 1fr; }
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px;  /* Prevents iOS zoom on focus */
        padding: 0.65rem 0.75rem;
    }
    .form-actions {
        flex-direction: column;
    }
    .form-actions .btn {
        width: 100%;
        text-align: center;
    }

    /* -- Tabs -- */
    .tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: 0;
    }
    .tabs::-webkit-scrollbar { display: none; }
    .tab {
        padding: 0.6rem 0.75rem;
        font-size: 0.8rem;
        white-space: nowrap;
        flex-shrink: 0;
    }

    /* -- Filter bar -- */
    .filter-bar {
        flex-direction: column;
        gap: 0.5rem;
    }
    .filter-bar input,
    .filter-bar select {
        width: 100%;
        min-width: 0;
        font-size: 16px;
        padding: 0.65rem 0.75rem;
    }
    .filter-bar .btn {
        width: 100%;
        text-align: center;
    }

    /* -- Search results -- */
    .results-list { grid-template-columns: 1fr; }
    .result-card {
        grid-template-columns: 50px 1fr;
        gap: 0.5rem;
    }
    .result-card .result-source {
        grid-column: 1 / -1;
        text-align: right;
    }

    /* -- Location preset -- */
    .location-preset { padding: 0.75rem; }
    .location-preset-header {
        flex-direction: column;
        gap: 0.25rem;
        align-items: flex-start;
    }
    .location-preset-fields {
        flex-direction: column;
        gap: 0.5rem;
    }
    .location-preset-fields .form-group { min-width: 0; }
    .location-preset-fields .btn { width: 100%; }

    /* -- Scanner -- */
    .scanner-box { max-width: 100%; }
    .scan-section .btn { width: 100%; }

    /* -- Photo preview -- */
    .photo-preview { max-width: 100%; }

    /* -- Pagination -- */
    .pagination {
        flex-direction: column;
        gap: 0.5rem;
    }

    /* -- Import -- */
    .csv-example {
        font-size: 0.7rem;
        display: block;
        overflow-x: auto;
    }

    /* -- Toast -- */
    .toast {
        left: 0.75rem;
        right: 0.75rem;
        bottom: 1rem;
        text-align: center;
    }

    /* -- Login -- */
    .login-card {
        padding: 1.5rem;
        margin: 0 0.5rem;
    }

    /* -- Buttons larger touch targets -- */
    .btn {
        padding: 0.65rem 1.25rem;
        font-size: 0.95rem;
        min-height: 44px;
    }
    .btn-lg {
        padding: 0.85rem 2rem;
        font-size: 1rem;
    }
}

/* Extra small screens (< 400px) */
@media (max-width: 400px) {
    .book-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tab {
        font-size: 0.75rem;
        padding: 0.5rem 0.6rem;
    }
}

.text-muted { color: var(--text-muted); }
.text-error { color: var(--danger); }