/* ==========================================
   Blocks Panel - Slide-in from left side
   ========================================== */

#blocks-panel {
    position: fixed;
    top: var(--header-height);
    left: var(--sidebar-left-width);
    bottom: var(--footer-height);
    width: 340px;
    background: var(--bg-panel);
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
    z-index: 80;
    display: flex;
    flex-direction: column;
    transform: translateX(calc(-100% - var(--sidebar-left-width)));
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 8px 0 32px var(--shadow-color);
    pointer-events: none;
}

#blocks-panel.open {
    transform: translateX(0);
    pointer-events: all;
}

/* Panel Header */
#blocks-panel-header {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px 12px;
    background: var(--sidebar-header-bg);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.blocks-panel-header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

#blocks-panel-header h3 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin: 0;
}

.blocks-panel-preview-options {
    display: flex;
    gap: 6px;
}

.blocks-panel-preview-options select {
    flex: 1;
    min-width: 0;
    background: var(--bg-input, #1e1e22);
    color: var(--text, #ccc);
    border: 1px solid var(--border, #444);
    border-radius: 4px;
    font-size: 11px;
    padding: 4px 6px;
    cursor: pointer;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    padding-right: 20px;
}

.blocks-panel-preview-options select:hover {
    border-color: var(--accent, #6c6);
}

.blocks-panel-preview-options select:focus {
    border-color: var(--accent, #6c6);
    box-shadow: 0 0 0 2px rgba(102, 204, 102, 0.15);
}

.blocks-panel-preview-hint {
    font-size: 10px;
    color: var(--text-muted, #666);
    display: flex;
    align-items: center;
    gap: 5px;
    opacity: 0.75;
    cursor: default;
    user-select: none;
}

.blocks-panel-preview-hint-icon {
    font-size: 11px;
    font-style: normal;
    flex-shrink: 0;
    opacity: 0.8;
}

#btn-close-blocks-panel {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    padding: 2px 6px;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
}

#btn-close-blocks-panel:hover {
    background: var(--hover-bg-strong);
    color: var(--text-main);
}

/* Panel Content */
#blocks-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) transparent;
}

#blocks-panel-content::-webkit-scrollbar {
    width: 6px;
}
#blocks-panel-content::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

/* Block Card */
.block-card {
    position: relative;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-dark);
    overflow: hidden;
    cursor: grab;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
    user-select: none;
    flex-shrink: 0;
}

.block-card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), 0 4px 16px rgba(0, 122, 204, 0.2);
}

.block-card:active {
    cursor: grabbing;
    transform: scale(0.98);
}

/* Preview container with scaled iframe */
.block-card-preview {
    width: 100%;
    height: 150px;
    overflow: hidden;
    position: relative;
    background: white;
    pointer-events: none;
}

.block-preview-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 1200px;
    height: 600px;
    border: none;
    transform-origin: 0 0;
    transform: scale(0.265);
    pointer-events: none;
}

/* Block label */
.block-card-label {
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
    border-top: 1px solid var(--border);
}

.block-card-label-icon {
    font-size: 14px;
    opacity: 0.7;
}

/* Drag ghost (floating label during drag) */
.block-drag-ghost {
    position: fixed;
    background: var(--accent);
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    pointer-events: none;
    z-index: 9999;
    box-shadow: 0 4px 20px rgba(0, 122, 204, 0.5);
    white-space: nowrap;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.1s;
}
.block-drag-ghost.visible { opacity: 1; }

/* Loading & empty states */
.blocks-loading {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 13px;
}

.blocks-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 13px;
    font-style: italic;
}

/* Blocks category items in sidebar */
.block-category-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-muted);
    border-left: 2px solid transparent;
    transition: color 0.15s, background 0.15s, border-color 0.15s;
    user-select: none;
    border-bottom: none;
    border-top: none;
    border-right: none;
}

.block-category-item:hover {
    color: var(--text-main);
    background: var(--hover-bg);
}

.block-category-item.active {
    color: var(--text-main);
    background: rgba(0, 122, 204, 0.15);
    border-left-color: var(--accent);
}

.block-category-icon {
    font-size: 15px;
    flex-shrink: 0;
}

.block-category-name {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.block-category-count {
    font-size: 11px;
    color: var(--text-muted);
    background: rgba(255,255,255,0.07);
    padding: 1px 6px;
    border-radius: 10px;
    flex-shrink: 0;
}

/* ==========================================
   Blocks Mode Toggle (Default / Library)
   ========================================== */
.blocks-mode-toggle {
    display: flex;
    gap: 1px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: hidden;
    margin-right: 10px;
}

.blocks-mode-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 10px;
    padding: 20px 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
    border-radius: 20%;
}

.blocks-mode-btn:hover {
    color: var(--text-main);
    background: var(--hover-bg-strong);
}

.blocks-mode-btn.active {
    background: var(--accent-light);
    color: #fff;
}

/* ==========================================
   Library Card Delete Button (on preview cards)
   ========================================== */
.library-card-delete {
    position: absolute;
    top: 6px;
    right: 6px;
    z-index: 5;
    width: 26px;
    height: 26px;
    background: rgba(25, 25, 30, 0.85);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s, color 0.15s, border-color 0.15s;
    pointer-events: all;
}

.block-card:hover .library-card-delete {
    opacity: 1;
}

.library-card-delete svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

.library-card-delete:hover {
    background: rgba(229, 83, 75, 0.9);
    border-color: #e5534b;
    color: #fff;
}