/* =====================================================
   Workspace: Sidebars, Toolbox, Properties Panel
===================================================== */

/* ═══════════════════════════════════════════════════════════════
   WORKSPACE  (Left + Canvas + Right)
═══════════════════════════════════════════════════════════════ */
.workspace {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
    /* CRITICAL: allows flex children to shrink below content size */
}

/* ─── Sidebars ────────────────────────────────────────────── */
aside {
    width: var(--sidebar-w);
    background: var(--surface);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-right: 1px solid var(--border);
    z-index: 10;
    flex-shrink: 0;
}

#sidebar-right {
    border-left: 1px solid var(--border);
    border-right: none;
}

/* Left Sidebar Tabs */
.left-sidebar-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.left-tab-btn {
    flex: 1;
    padding: 8px 4px;
    border: none;
    background: transparent;
    color: var(--text-3);
    font-size: 10px;
    font-weight: 700;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    text-transform: uppercase;
    letter-spacing: .03em;
    transition: all .15s;
}

.left-tab-btn:hover {
    color: var(--text-2);
    background: var(--bg);
}

.left-tab-btn.active {
    color: var(--blue);
    border-bottom-color: var(--blue);
    background: white;
}

.left-panel {
    display: none;
    flex: 1;
    overflow-y: auto;
    flex-direction: column;
    min-height: 0;
}

.left-panel.active {
    display: flex;
}

/* Left Panel Header */
.lp-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-3);
    background: #f8fafc;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.btn-add-slide {
    padding: 3px 9px;
    border: 1px solid var(--blue-mid);
    background: var(--blue-light);
    color: var(--blue);
    border-radius: 5px;
    font-size: 11px;
    font-weight: 700;
}

.btn-add-slide:hover {
    background: var(--blue);
    color: white;
}

.lp-section {
    padding: 12px;
    border-top: 1px solid var(--border);
}

.lp-sec-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-3);
    margin-bottom: 8px;
}

/* Right Panel Tabs */
.feature-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.feature-tab {
    flex: 1;
    padding: 8px 2px;
    border: none;
    background: transparent;
    color: var(--text-3);
    font-size: 10px;
    font-weight: 700;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: .02em;
    transition: all .15s;
}

.feature-tab:hover {
    color: var(--text-2);
    background: var(--bg);
}

.feature-tab.active {
    color: var(--blue);
    border-bottom-color: var(--blue);
    background: white;
}

.feature-panel {
    display: none;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.feature-panel.active {
    display: flex;
}

/* Right Panel Header */
.rp-header {
    padding: 8px 14px;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-3);
    background: #f8fafc;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.rp-section {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
}

.rp-section:last-child {
    border-bottom: none;
}

.rp-sec-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-3);
    margin-bottom: 8px;
}

#properties-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

.rp-scroll {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

/* Property rows */
.prop-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 12px;
}

.prop-row:last-child {
    margin-bottom: 0;
}

.prop-row label {
    color: var(--text-2);
    font-weight: 500;
    font-size: 12px;
}

/* Effects Buttons */
.eff-row {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.eff-btn {
    flex: 1;
    min-width: 52px;
    padding: 5px 8px;
    border: 1px solid var(--border-2);
    border-radius: 5px;
    background: white;
    font-size: 11px;
    font-weight: 600;
    color: var(--text);
    transition: all .15s;
    text-align: center;
}

.eff-btn:hover {
    background: var(--blue-light);
    border-color: var(--blue-mid);
    color: var(--blue);
}

.eff-btn.active {
    background: var(--blue-light);
    border-color: var(--blue);
    color: var(--blue);
}

.eff-btn-sm {
    padding: 3px 9px;
    border: 1px solid var(--border-2);
    border-radius: 4px;
    background: white;
    font-size: 11px;
    font-weight: 600;
    color: var(--text);
}

.eff-btn-sm:hover {
    background: var(--blue-light);
    border-color: var(--blue-mid);
    color: var(--blue);
}

.eff-btn-sm.active {
    background: var(--blue-light);
    border-color: var(--blue);
    color: var(--blue);
}

.debug-panel {
    margin: 12px;
    padding: 8px;
    background: #1e293b;
    border-radius: 6px;
    font-size: 10px;
    color: #64748b;
    font-family: 'Roboto Mono', monospace;
    max-height: 100px;
    overflow-y: auto;
}

/* Slide Panel */
#pappers-panel {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-height: 0;
}

.papper-thumb {
    flex-shrink: 0;
    border: 2px solid var(--border-2);
    border-radius: 8px;
    background: white;
    cursor: pointer;
    transition: border-color .15s, box-shadow .15s;
    display: flex;
    flex-direction: column;
    min-height: 130px;
}

.papper-thumb:hover {
    border-color: #93c5fd;
    box-shadow: var(--shadow-sm);
}

.papper-thumb.active {
    border-color: var(--blue);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, .18);
}

.papper-thumb.hidden-papper {
    opacity: .45;
}

.papper-thumb.dragging {
    opacity: .35;
    transform: scale(.97);
}

.papper-thumb.drag-over {
    border-color: #22c55e;
}

.papper-preview-wrap {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    background: #f8fafc;
    border-radius: 6px 6px 0 0;
    overflow: hidden;
    flex-shrink: 0;
}

.papper-preview-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
    display: block;
    border-radius: 6px 6px 0 0;
}

.papper-footer {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 7px;
    background: white;
    border-radius: 0 0 6px 6px;
    border-top: 1px solid #eef0f4;
    min-height: 28px;
    flex-shrink: 0;
}

.papper-num {
    width: 18px;
    height: 18px;
    background: #eef0f4;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 9px;
    color: #64748b;
    flex-shrink: 0;
}

.papper-thumb.active .papper-num {
    background: var(--blue);
    color: white;
}

.papper-name {
    font-weight: 600;
    color: #1e293b;
    font-size: 10px;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.papper-actions {
    display: flex;
    gap: 2px;
    flex-shrink: 0;
    opacity: 0;
    transition: opacity .15s;
    pointer-events: none;
}

.papper-thumb:hover .papper-actions {
    opacity: 1;
    pointer-events: auto;
}

.papper-action-btn {
    width: 20px;
    height: 20px;
    border: none;
    background: #f1f5f9;
    border-radius: 4px;
    color: #64748b;
    font-size: 10px;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.papper-action-btn:hover {
    background: #e2e8f0;
    color: #0f172a;
}

.papper-action-btn.danger:hover {
    background: #fee2e2;
    color: #e11d48;
}

.hidden-badge {
    font-size: 8px;
    background: #fef3c7;
    color: #92400e;
    padding: 1px 4px;
    border-radius: 3px;
    font-weight: 700;
    flex-shrink: 0;
}

.add-papper-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 10px;
    border: 2px dashed var(--border-2);
    border-radius: 8px;
    font-size: 11px;
    font-weight: 700;
    color: var(--text-3);
    cursor: pointer;
    transition: all .18s;
    flex-shrink: 0;
}

.add-papper-btn:hover {
    border-color: var(--blue);
    color: var(--blue);
    background: var(--blue-light);
}

/* Themes Panel */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 12px;
}

.theme-card {
    cursor: pointer;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--border);
    transition: all .2s;
}

.theme-card:hover {
    border-color: var(--blue);
    box-shadow: var(--shadow-sm);
}

.theme-card.active {
    border-color: var(--blue);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, .15);
}

.theme-preview {
    height: 48px;
    border-radius: 6px 6px 0 0;
    overflow: hidden;
}

.theme-name {
    font-size: 10px;
    font-weight: 700;
    text-align: center;
    padding: 5px;
    color: var(--text-3);
}

/* Toolbox */
.toolbox-category {
    margin-bottom: 16px;
    padding: 0 12px;
}

.category-header {
    font-size: 10px;
    font-weight: 800;
    color: var(--text-3);
    margin: 14px 0 8px;
    text-transform: uppercase;
    letter-spacing: .05em;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
}

.category-header:hover {
    color: var(--text-2);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.toolbox-item {
    aspect-ratio: 1;
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all .2s;
    background: white;
    color: var(--text-3);
    font-size: 10px;
}

.toolbox-item:hover {
    border-color: var(--blue);
    color: var(--blue);
    background: var(--blue-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-xs);
}

.toolbox-item.active {
    border-color: var(--blue);
    background: var(--blue-light);
    color: var(--blue);
}


/* ── Background Panel Controls ─────────────────────────── */
.bg-control-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
    margin-bottom: 4px;
}

.bg-control-label {
    font-size: 12px;
    color: var(--text-2);
    font-weight: 500;
}

.bg-color-swatch-wrap {
    position: relative;
    width: 36px;
    height: 24px;
    border-radius: 5px;
    overflow: hidden;
    border: 1.5px solid var(--border);
    cursor: pointer;
}

.bg-color-input {
    position: absolute;
    width: 150%;
    height: 150%;
    top: -25%;
    left: -25%;
    border: none;
    padding: 0;
    cursor: pointer;
    background: none;
}

.bg-subsection-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-3);
    margin: 8px 0 6px;
}

.bg-gradient-row {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 6px;
}

.bg-color-pair {
    display: flex;
    gap: 5px;
}

.bg-color-pair .bg-color-input {
    position: relative;
    width: 100%;
    height: 26px;
    flex: 1;
    top: 0;
    left: 0;
    border-radius: 5px;
    border: 1.5px solid var(--border);
    cursor: pointer;
    padding: 0;
}

.bg-dir-select {
    width: 100%;
    height: 28px;
    border: 1.5px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    font-size: 12px;
    padding: 0 6px;
    cursor: pointer;
}

.bg-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    height: 30px;
    border-radius: 7px;
    font-size: 12px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: opacity 0.15s, transform 0.1s;
    letter-spacing: 0.01em;
}

.bg-action-btn:hover { opacity: 0.88; transform: translateY(-1px); }
.bg-action-btn:active { transform: translateY(0); }

.bg-action-primary {
    background: linear-gradient(90deg, #0055ff, #7c3aed);
    color: #fff;
}

.bg-action-secondary {
    background: var(--bg);
    color: var(--text);
    border: 1.5px solid var(--border);
}

.bg-action-secondary:hover { background: #e8f0fe; color: #0055ff; border-color: #0055ff; }

.bg-action-danger {
    background: #fff5f5;
    color: #dc2626;
    border: 1.5px solid #fecaca;
}

.bg-action-danger:hover { background: #fee2e2; border-color: #f87171; }

.bg-btn-row {
    display: flex;
    gap: 5px;
    margin-top: 0;
}