/* ===== MODAL XEM TRƯỚC (fit-content) ===== */
#preview-modal {
    position: fixed;
    inset: 0;
    z-index: 99998;
    display: none;
    align-items: center;
    justify-content: center;
}

#preview-modal.active {
    display: flex;
    contain: strict;
    isolation: isolate;
}

#preview-modal .preview-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
}

#preview-modal .preview-container {
    position: relative;
    z-index: 1;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

#preview-modal .preview-close {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease, transform 0.2s ease;
    z-index: 2;
}

#preview-modal .preview-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

#preview-modal .preview-content img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 4px;
    display: block;
}

#preview-modal .preview-content video {
    max-width: 90vw;
    max-height: 90vh;
    display: block;
    border-radius: 4px;
    background: #000;
    transform: translateZ(0);
}

#preview-modal .preview-content audio {
    min-width: 320px;
}

#preview-modal .preview-content iframe {
    width: 90vw;
    height: 88vh;
    border: none;
    border-radius: 4px;
    background: #fff;
}

#preview-modal .preview-audio-wrap {
    background: var(--bg-secondary, #1e1e2e);
    border-radius: 12px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    min-width: 360px;
    max-width: 420px;
    border: 1px solid var(--border-primary, #333);
}

#preview-modal .preview-audio-wrap .preview-audio-icon {
    font-size: 3rem;
    color: #e94560;
}

#preview-modal .preview-audio-wrap .preview-audio-name {
    font-size: 14px;
    color: var(--text-primary, #fff);
    font-weight: 600;
    text-align: center;
    word-break: break-all;
}

#preview-modal .preview-audio-wrap audio {
    width: 100%;
}

.fcc-fields {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.fcc-row {
    display: flex;
    gap: 6px;
}

.fcc-fields input,
.fcc-fields textarea {
    width: 100%;
    font-size: 12px;
    padding: 6px 8px;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    resize: none;
}

.fcc-fields input:focus,
.fcc-fields textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.fcc-fields .meta-title {
    flex: 2;
}

.fcc-fields .meta-tags {
    flex: 1;
}

.fcc-size {
    font-size: 10px;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Lưới tuỳ chỉnh màu */
.color-customizer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.color-customizer-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 10px 6px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    transition: border-color 0.15s ease;
}

.color-customizer-item:hover {
    border-color: var(--border-secondary);
}

.color-customizer-item input[type="color"] {
    width: 36px;
    height: 36px;
    padding: 2px;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: transparent;
}

.color-customizer-item .color-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

.color-customizer-item .color-hex {
    font-size: 11px;
    color: var(--text-tertiary);
    font-family: monospace;
    width: 75px;
    text-align: center;
    padding: 3px 4px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    cursor: text;
    transition: border-color 0.15s;
}

.color-customizer-item .color-hex:focus {
    border-color: var(--color-primary);
    color: var(--text-primary);
    outline: none;
}

.remove-file {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #dc3545;
    color: #fff;
    border: none;
    font-size: 18px;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 8px rgba(0, 0, 0, .3);
    transition: transform .15s ease, background .15s ease;
}

.remove-file:hover {
    background: #b52a37;
    transform: scale(1.1);
}

.remove-file:active {
    transform: scale(0.98);
}

.remove-file:focus-visible {
    outline: 2px solid rgba(243, 156, 18, 0.9);
    outline-offset: 2px;
}