.btn-icon {
    background-color: #222222;
    color: var(--bs-secondary-color);
    border: none;
}

.btn-icon:hover,
.btn-icon:focus {
    background-color: var(--bs-primary);
    color: #fff;
    outline: 2px solid #fff;
    outline-offset: 2px;
}

.form-control-dark {
    background-color: transparent;
    border: 1px solid var(--bs-border-color);
    color: #fff;
}

.form-control-dark::placeholder {
    color: var(--bs-secondary-color);
}

.form-control-dark:focus {
    background-color: #222222;
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.5);
    color: #fff;
}

.input-group-text-dark {
    background-color: transparent;
    border: 1px solid var(--bs-border-color);
    color: var(--bs-secondary-color);
    border-inline-end: 0;
}

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

.btn-primary:hover,
.btn-primary:focus {
    opacity: 0.9;
    background-color: var(--bs-primary);
    border-color: #7961FF;
    box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.5);
}

.btn-filter {
    background-color: #222222;
    color: white;
    border: 1px solid var(--bs-border-color);
}

.btn-filter:hover,
.btn-filter:focus {
    background-color: #333333;
    border-color: var(--bs-primary);
}

.form-check-input {
    background-color: #222222;
    border: 1px solid var(--bs-border-color);
}

.form-check-input:checked {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.form-check-input:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.5);
}

.card-book {
    cursor: pointer;
    position: relative;
    border: 1px solid #222222;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    aspect-ratio: 3/4;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.card-book:hover {
    transform: translateY(-0.5rem);
    border-color: var(--bs-primary);
}

.card-book a.card-link {
    position: absolute;
    inset: 0;
    z-index: 1;
    text-decoration: none;
}

.card-book a.card-link:focus {
    outline: 3px solid var(--bs-primary);
    outline-offset: 3px;
    border-radius: .375rem;
}

/* .card-book .card-img-overlay {
    background-color: rgba(0, 0, 0, 0.4);
    transition: background-color 0.3s ease;
    pointer-events: none;
} */

.card-book:hover .card-img-overlay {
    background-color: rgba(0, 0, 0, 0.6);
}

.card-book .card-body {
    position: absolute;
    bottom: 0;
    inset-inline: 0;
    background: linear-gradient(to top, rgba(17, 17, 17, 0.95), transparent);
    z-index: 2;
    pointer-events: none;
}

.card-book .owner-badge,
.card-book .coauthor-badge {
    background-color: rgba(0, 0, 0, 0.7);
    font-size: 0.75rem;
    z-index: 2;
}

.card-book .card-body > div:first-child {
    min-width: 0;
    overflow: hidden;
}

.card-book .card-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-book .card-actions {
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: auto;
    z-index: 3;
    flex-shrink: 0;
}

.card-book:hover .card-actions,
.card-book:focus-within .card-actions {
    opacity: 1;
    transform: translateY(0);
}

.btn-action {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(5px);
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.25rem;
    padding: 0;
}

.btn-action:hover,
.btn-action:focus {
    background-color: rgba(255, 255, 255, 0.4);
    color: white;
    outline: 2px solid white;
    outline-offset: 1px;
}

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

.btn-action.btn-primary:hover,
.btn-action.btn-primary:focus {
    opacity: 0.9;
    background-color: var(--bs-primary);
    outline-color: var(--bs-primary);
}

.footer {
    border-top: 1px solid #222222;
    background-color: #111111;
}

.footer-icon {
    color: var(--bs-secondary-color);
}

.footer-icon:hover,
.footer-icon:focus {
    color: #fff;
    outline: 2px solid #fff;
    outline-offset: 2px;
    border-radius: 4px;
}

.placeholder-cover {
    border: 2px dashed #333;
    background-color: #1a1a1a;
    aspect-ratio: 3/4;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--bs-secondary-color);
}

.placeholder-cover .material-symbols-outlined {
    font-size: 3rem;
    color: #495057;
}

.offcanvas {
    background-color: #1a1a1a;
    color: #fff;
    border-inline-start: 1px solid #222222;
}

.offcanvas-header {
    border-bottom: 1px solid #222222;
}

/* Preset modal styles */
.preset-info-card {
    background-color: rgba(var(--bs-dark-rgb), 0.5);
    border: 1px solid var(--bs-border-color);
    border-radius: 0.75rem;
    padding: 1rem;
}

.preset-check-icon {
    font-size: 16px;
    color: var(--bs-primary-text-emphasis);
    font-variation-settings: 'FILL' 1;
}

.preset-attributes-section {
    border-top: 1px solid rgba(var(--bs-primary-rgb), 0.1);
    margin-top: 0.75rem;
    padding-top: 0.75rem;
}

.preset-modal-footer {
    background-color: rgba(var(--bs-dark-rgb), 0.8);
}

.tracking-wide {
    letter-spacing: 0.05em;
}

/* ── Light theme ─────────────────────────────────────────────────── */
[data-bs-theme="light"] .btn-icon {
    background-color: #e9ecef;
    color: #495057;
}

[data-bs-theme="light"] .btn-icon:hover,
[data-bs-theme="light"] .btn-icon:focus {
    background-color: var(--bs-primary);
    color: #fff;
}

[data-bs-theme="light"] .form-control-dark {
    background-color: #fff;
    border-color: #ced4da;
    color: var(--bs-body-color);
}

[data-bs-theme="light"] .form-control-dark::placeholder {
    color: #6c757d;
}

[data-bs-theme="light"] .form-control-dark:focus {
    background-color: #fff;
    color: var(--bs-body-color);
}

[data-bs-theme="light"] .input-group-text-dark {
    border-color: #ced4da;
    color: #495057;
}

[data-bs-theme="light"] .btn-filter {
    background-color: #e9ecef;
    color: var(--bs-body-color);
    border-color: #ced4da;
}

[data-bs-theme="light"] .btn-filter:hover,
[data-bs-theme="light"] .btn-filter:focus {
    background-color: #dee2e6;
    border-color: var(--bs-primary);
}

[data-bs-theme="light"] .placeholder-cover {
    border-color: #ced4da;
    background-color: #f8f9fa;
    color: #495057;
}

/* ──────────────────────────────────────────────────────────────
   Typography — per DESIGN.md "Editorial Cartography"
   • Display & Headlines → Space Grotesk ("The Architect"), tight tracking
   • Body & UI           → Inter ("The Scribe")
   • Labels & Metadata   → Space Grotesk, uppercase, 0.05em tracking
   index.css is loaded only on the library page, so these stay scoped here.
   ────────────────────────────────────────────────────────────── */

/* Body & UI — Inter */
main,
#search-input,
.form-control,
.form-select,
.btn,
.dropdown-item,
.card-text,
.lead {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

/* Display & Headlines — Space Grotesk, tight letter-spacing */
main h1,
main h2,
main .display-4,
.modal-title,
.offcanvas-title,
.card-title {
    font-family: 'Space Grotesk', system-ui, sans-serif;
    letter-spacing: -0.02em;
}

/* Labels & Metadata — Space Grotesk, uppercase, 0.05em */
.badge,
.form-label,
.edition-label,
.paragraph-count {
    font-family: 'Space Grotesk', system-ui, sans-serif;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}


[data-bs-theme="light"] .placeholder-cover .material-symbols-outlined {
    color: #adb5bd;
}

[data-bs-theme="light"] .offcanvas {
    background-color: #fff;
    color: var(--bs-body-color);
    border-inline-start-color: #dee2e6;
}

[data-bs-theme="light"] .offcanvas-header {
    border-bottom-color: #dee2e6;
}

[data-bs-theme="light"] .preset-modal-footer {
    background-color: #f8f9fa;
}

[data-bs-theme="light"] .preset-info-card {
    background-color: #f0f2f5;
}

[data-bs-theme="light"] .form-check-input {
    background-color: #e9ecef;
    border-color: #ced4da;
}

[data-bs-theme="light"] .form-check-input:checked {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

[data-bs-theme="light"] .card-book {
    border-color: #dee2e6;
}

[data-bs-theme="light"] .footer {
    border-top-color: #dee2e6;
    background-color: #f8f9fa;
}

[data-bs-theme="light"] .footer-icon {
    color: #495057;
}

[data-bs-theme="light"] .footer-icon:hover,
[data-bs-theme="light"] .footer-icon:focus {
    color: #212529;
    outline-color: #212529;
}