.btn-icon {
    background-color: #222222;
    color: #adb5bd;
    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 #6c757d;
    color: #fff;
}

.form-control-dark::placeholder {
    color: #adb5bd;
}

.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;
    outline: none;
}

.input-group-text-dark {
    background-color: transparent;
    border: 1px solid #6c757d;
    color: #adb5bd;
    border-right: 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 #6c757d;
}

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

.form-check-input {
    background-color: #222222;
    border: 1px solid #6c757d;
}

.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;
    top: 0;
    left: 0;
    right: 0;
    bottom: 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;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(17, 17, 17, 0.95), transparent);
    z-index: 2;
    pointer-events: none;
}

.card-book .author-badge {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background-color: rgba(0, 0, 0, 0.7);
    font-size: 0.75rem;
    z-index: 2;
}

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

.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: #adb5bd;
}

.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: #adb5bd;
}

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

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

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