:root {
    --color-bg: #f5f5f5;
    --color-surface: #ffffff;
    --color-border: #e0e0e0;
    --color-text: #333333;
    --color-text-muted: #666666;
    --color-accent: #555555;
    --color-danger: #dc3545;
    --color-danger-hover: #c82333;
    --color-success: #166534;
    --color-success-bg: #dcfce7;
    --color-success-border: #bbf7d0;
    --color-error-bg: #fee2e2;
    --color-error-border: #fecaca;
    --color-progress: #4a7c59;
}

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

/* Line clamp utilities */
.line-clamp-1 {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

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

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--color-text);
}

.navbar-brand:hover {
    color: var(--color-accent);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-item {
    padding: 0.5rem 0.75rem;
    text-decoration: none;
    color: var(--color-text-muted);
    border-radius: 4px;
    font-size: 0.9rem;
    transition: background-color 0.2s, color 0.2s;
}

.navbar-item:hover {
    background-color: var(--color-bg);
    color: var(--color-text);
}

.navbar-form {
    display: inline;
    margin: 0;
}

.navbar-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

/* Footer */
.footer {
    text-align: center;
    padding: 1rem 2rem;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

.footer a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
}

.footer a:hover {
    color: var(--color-text);
}

/* Page header - simple page title with optional actions */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin: 0;
}

.page-header-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

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

/* Header */
.header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.admin-nav {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--color-surface);
    color: var(--color-text);
    transition: background-color 0.2s, border-color 0.2s;
}

.btn:hover {
    background-color: var(--color-bg);
    border-color: var(--color-accent);
}

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

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

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

.btn-danger {
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-danger:hover {
    background-color: var(--color-danger);
    color: white;
}

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
}

/* Forms */
.form-container {
    max-width: 400px;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-inline {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-end;
}

.form-inline .form-group {
    flex: 1;
    min-width: 150px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background-color: var(--color-surface);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* Error messages */
.error-message {
    padding: 1rem;
    background-color: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    border-radius: 4px;
    color: var(--color-danger);
    margin-bottom: 1rem;
}

/* Success messages */
.success-message {
    padding: 1rem;
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    border-radius: 4px;
    color: var(--color-success);
    margin-bottom: 1rem;
}

/* User grid (dashboard) */
.user-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.user-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.user-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.user-card .avatar-medium {
    margin-bottom: 1rem;
}

.user-card h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.user-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Shelves and books */
.shelf {
    margin-bottom: 2rem;
}

.shelf h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
}

.book-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.book-card:hover {
    border-color: var(--color-accent);
}

.book-cover {
    width: 100%;
    aspect-ratio: 2/3;
    object-fit: cover;
    display: block;
}

.book-cover-placeholder {
    width: 100%;
    aspect-ratio: 2/3;
    background-color: var(--color-bg);
}

.book-info {
    padding: 0.75rem;
}

.book-title {
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-authors {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-status {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.15rem 0.5rem;
    font-size: 0.7rem;
    background-color: var(--color-bg);
    border-radius: 4px;
    color: var(--color-text-muted);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--color-border);
    border-radius: 3px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--color-progress);
    border-radius: 3px;
}

/* Sections */
.section {
    margin-bottom: 2rem;
}

.section h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    background-color: var(--color-bg);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.table tr:last-child td {
    border-bottom: none;
}

.table .actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* User list */
.user-list {
    list-style: none;
}

.user-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-list li:last-child {
    border-bottom: none;
}

/* Admin book management */
.admin-book-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.admin-book-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    flex-wrap: wrap;
}

.book-thumb {
    width: 40px;
    height: 60px;
    object-fit: cover;
    border-radius: 2px;
}

.book-thumb-placeholder {
    width: 40px;
    height: 60px;
    background-color: var(--color-bg);
    border-radius: 2px;
}

.book-details {
    flex: 1;
    min-width: 150px;
    line-height: 1.3;
}

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

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

.book-meta-item {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.inline-form {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.inline-form select {
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

/* Search */
.search-form {
    max-width: 500px;
}

.search-form input[type="text"] {
    flex: 1;
}

.search-results {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    flex-wrap: wrap;
}

.add-book-form {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.add-book-form select {
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 0.75rem;
        padding: 1rem;
    }

    .navbar-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .container {
        padding: 1rem;
    }

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

    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    .book-info {
        padding: 0.5rem;
    }

    .book-title {
        font-size: 0.8rem;
        margin-bottom: 0.15rem;
    }

    .book-authors {
        font-size: 0.7rem;
    }

    .book-status {
        margin-top: 0.35rem;
        padding: 0.1rem 0.4rem;
        font-size: 0.65rem;
    }

    .admin-book-item {
        gap: 0.5rem;
        padding: 0.5rem;
        align-items: flex-start;
    }

    .admin-book-item .book-details {
        min-width: 0;
        flex: 1 1 calc(100% - 50px);
    }

    .admin-book-item .btn-small {
        padding: 0.2rem 0.5rem;
        font-size: 0.8rem;
    }

    .admin-book-item .inline-form {
        width: auto;
    }

    .search-result-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .inline-form,
    .add-book-form {
        width: 100%;
        flex-wrap: wrap;
    }

    .table {
        font-size: 0.85rem;
    }

    .table th,
    .table td {
        padding: 0.5rem;
    }

    .add-book-preview {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .add-book-info h2 {
        font-size: 1.25rem;
    }
}

/* Add Book Page */
.add-book-preview {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1.5rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
}

.book-cover-large {
    width: 120px;
    height: 180px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
}

.book-cover-large-placeholder {
    width: 120px;
    height: 180px;
    background-color: var(--color-bg);
    border-radius: 4px;
    flex-shrink: 0;
}

.add-book-info h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.add-book-info .authors {
    color: var(--color-text-muted);
    font-size: 1rem;
}

.add-book-form-full {
    max-width: 500px;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s;
}

.radio-option:hover {
    border-color: var(--color-accent);
}

.radio-option input[type="radio"] {
    margin: 0;
}

.radio-option input[type="radio"]:checked + span {
    font-weight: 500;
}

.radio-option:has(input:checked) {
    border-color: var(--color-accent);
    background-color: var(--color-bg);
}

.sub-status-group {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.sub-status-group > label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    display: block;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.open {
    display: flex;
}

.modal-content {
    background-color: var(--color-surface);
    border-radius: 8px;
    padding: 1.5rem;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 1.25rem 0;
}

.modal-content h4 {
    font-size: 0.95rem;
    margin: 0 0 0.75rem 0;
    color: var(--color-text-muted);
}

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

.modal-content .form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.modal-content .form-group select,
.modal-content .form-group input {
    width: 100%;
    padding: 0.5rem;
    font-size: 0.95rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.modal-content .btn {
    width: 100%;
}

/* Shelf expand button */
.shelf-expand-btn {
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
    color: var(--color-text-muted);
    background: none;
    border: 1px dashed var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
}

.shelf-expand-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}

/* HTMX loading indicator */
.htmx-indicator {
    display: none;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
    display: inline-block;
}

.search-indicator {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    padding: 0.5rem 0;
}

/* Avatar styles */
.avatar-large {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.avatar-medium {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.avatar-section {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.avatar-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.avatar-upload-form {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.avatar-upload-form input[type="file"] {
    font-size: 0.9rem;
}

.avatar-remove-form {
    display: inline;
}

.avatar-help {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* User page header with avatar */
.user-page-header {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.user-page-header-info {
    flex: 1;
}

.user-page-header h1 {
    margin: 0;
}

.user-page-header .subtitle {
    margin-top: 0.25rem;
}

/* Responsive adjustments for avatars */
@media (max-width: 768px) {
    .avatar-large {
        width: 120px;
        height: 120px;
    }

    .avatar-medium {
        width: 60px;
        height: 60px;
    }

    .avatar-section {
        flex-direction: column;
        align-items: center;
    }

    .avatar-actions {
        align-items: center;
        text-align: center;
    }

    .user-page-header {
        flex-direction: row;
        align-items: center;
    }

    .user-page-header .avatar-medium {
        width: 60px;
        height: 60px;
    }

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

/* Side-by-side shelves for public user page */
.shelves-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .shelves-row {
        grid-template-columns: 1fr;
    }
}