/* Documents Page */
.casc-docs {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--casc-space-lg) var(--casc-space-md);
}

/* Toolbar */
.casc-docs__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--casc-space-md);
    margin-bottom: var(--casc-space-lg);
    flex-wrap: wrap;
}

.casc-docs__breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--casc-space-xs);
    flex: 1;
    min-width: 0;
    overflow-x: auto;
}

.casc-docs__breadcrumb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 1px solid var(--casc-border, #d1d5db);
    border-radius: var(--casc-radius-sm, 6px);
    background: var(--casc-bg, #fff);
    cursor: pointer;
    color: var(--casc-text-secondary, #6b7280);
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
}

.casc-docs__breadcrumb-btn:hover {
    background: var(--casc-gray-50, #f9fafb);
    color: var(--casc-text, #111827);
}

.casc-docs__breadcrumb-path {
    display: flex;
    align-items: center;
    gap: 2px;
    font-size: 0.875rem;
    color: var(--casc-text-secondary, #6b7280);
    white-space: nowrap;
    overflow-x: auto;
}

.casc-docs__breadcrumb-seg {
    cursor: pointer;
    color: var(--casc-primary, #2563eb);
    padding: 2px 4px;
    border-radius: 4px;
}

.casc-docs__breadcrumb-seg:hover {
    text-decoration: underline;
}

.casc-docs__breadcrumb-sep {
    color: var(--casc-text-secondary, #9ca3af);
    user-select: none;
}

.casc-docs__breadcrumb-seg.is-current {
    color: var(--casc-text, #111827);
    cursor: default;
    font-weight: 500;
}

.casc-docs__breadcrumb-seg.is-current:hover {
    text-decoration: none;
}

/* Search */
.casc-docs__search {
    position: relative;
    flex-shrink: 0;
    width: 240px;
}

.casc-docs__search svg {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--casc-text-secondary, #9ca3af);
    pointer-events: none;
}

.casc-docs__search-input {
    width: 100%;
    padding: 8px 12px 8px 34px;
    border: 1px solid var(--casc-border, #d1d5db);
    border-radius: var(--casc-radius-sm, 6px);
    font-size: 0.875rem;
    background: var(--casc-bg, #fff);
    color: var(--casc-text, #111827);
    outline: none;
    transition: border-color 0.15s;
}

.casc-docs__search-input:focus {
    border-color: var(--casc-primary, #2563eb);
}

/* Grid */
.casc-docs__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--casc-space-md, 16px);
}

/* Card */
.casc-docs__card {
    border: 1px solid var(--casc-border, #e5e7eb);
    border-radius: var(--casc-radius, 8px);
    background: var(--casc-bg, #fff);
    cursor: pointer;
    overflow: hidden;
    transition: box-shadow 0.15s, transform 0.15s;
}

.casc-docs__card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.casc-docs__card-thumb {
    aspect-ratio: 4 / 3;
    width: 100%;
    object-fit: cover;
    display: block;
    background: var(--casc-gray-50, #f9fafb);
}

.casc-docs__card-icon {
    aspect-ratio: 4 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--casc-gray-50, #f9fafb);
    color: var(--casc-text-secondary, #9ca3af);
}

.casc-docs__card-body {
    padding: var(--casc-space-sm, 12px);
}

.casc-docs__card-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--casc-text, #111827);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.casc-docs__card-meta {
    font-size: 0.75rem;
    color: var(--casc-text-secondary, #9ca3af);
    margin-top: 4px;
}

/* Loading */
.casc-docs__loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--casc-space-sm);
    padding: var(--casc-space-xl, 48px) 0;
    color: var(--casc-text-secondary, #9ca3af);
}

.casc-docs__spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--casc-border, #e5e7eb);
    border-top-color: var(--casc-primary, #2563eb);
    border-radius: 50%;
    animation: casc-docs-spin 0.7s linear infinite;
}

@keyframes casc-docs-spin {
    to { transform: rotate(360deg); }
}

/* Empty & Error */
.casc-docs__empty,
.casc-docs__error {
    text-align: center;
    padding: var(--casc-space-xl, 48px) var(--casc-space-md);
    color: var(--casc-text-secondary, #6b7280);
}

.casc-docs__empty-icon {
    margin-bottom: var(--casc-space-sm);
    color: var(--casc-text-secondary, #9ca3af);
}

.casc-docs__empty h2 {
    margin: 0 0 var(--casc-space-xs);
    font-size: 1.25rem;
    color: var(--casc-text, #111827);
}

.casc-docs__error {
    color: var(--casc-error, #dc2626);
}

/* Modal */
.casc-docs__modal-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: var(--casc-space-md);
}

.casc-docs__modal-backdrop.is-open {
    display: flex;
}

.casc-docs__modal {
    background: var(--casc-bg, #fff);
    border-radius: var(--casc-radius, 8px);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.casc-docs__modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--casc-space-md) var(--casc-space-lg, 24px);
    border-bottom: 1px solid var(--casc-border, #e5e7eb);
}

.casc-docs__modal-title {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.casc-docs__modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--casc-text-secondary, #6b7280);
    padding: 4px 8px;
    line-height: 1;
    flex-shrink: 0;
}

.casc-docs__modal-close:hover {
    color: var(--casc-text, #111827);
}

/* Preview */
.casc-docs__preview {
    padding: var(--casc-space-md) var(--casc-space-lg, 24px);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    background: var(--casc-gray-50, #f9fafb);
}

.casc-docs__preview iframe {
    width: 100%;
    height: 450px;
    border: none;
    border-radius: var(--casc-radius-sm, 4px);
}

.casc-docs__preview img {
    max-width: 100%;
    max-height: 450px;
    object-fit: contain;
    border-radius: var(--casc-radius-sm, 4px);
}

.casc-docs__preview-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--casc-space-sm);
    color: var(--casc-text-secondary, #9ca3af);
    padding: var(--casc-space-lg) 0;
}

.casc-docs__preview-loading {
    display: flex;
    align-items: center;
    gap: var(--casc-space-sm);
    color: var(--casc-text-secondary, #9ca3af);
}

/* Meta grid */
.casc-docs__meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--casc-space-sm) var(--casc-space-md);
    padding: var(--casc-space-md) var(--casc-space-lg, 24px);
    font-size: 0.875rem;
}

.casc-docs__meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.casc-docs__meta-label {
    font-size: 0.75rem;
    color: var(--casc-text-secondary, #9ca3af);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.casc-docs__meta-value {
    color: var(--casc-text, #111827);
}

/* Downloads */
.casc-docs__downloads {
    display: flex;
    flex-wrap: wrap;
    gap: var(--casc-space-xs, 8px);
    padding: var(--casc-space-md) var(--casc-space-lg, 24px);
    border-top: 1px solid var(--casc-border, #e5e7eb);
}

.casc-docs__download-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--casc-border, #d1d5db);
    border-radius: var(--casc-radius-sm, 6px);
    background: var(--casc-bg, #fff);
    color: var(--casc-text, #111827);
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s;
}

.casc-docs__download-btn:hover {
    background: var(--casc-gray-50, #f9fafb);
    border-color: var(--casc-primary, #2563eb);
    color: var(--casc-primary, #2563eb);
}

.casc-docs__download-btn svg {
    width: 14px;
    height: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .casc-docs__grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }

    .casc-docs__toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .casc-docs__search {
        width: 100%;
    }

    .casc-docs__meta-grid {
        grid-template-columns: 1fr;
    }

    .casc-docs__preview iframe {
        height: 300px;
    }
}