/* ===== All-in-One Digital Studio ===== */
.page-studio {
    height: calc(100vh - var(--topbar-height));
    min-height: 0;
    margin: -24px -32px;
    padding: 12px;
    background: var(--bg-primary);
}

.studio-kicker {
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 6px;
}

.studio-shell {
    display: grid;
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 12px;
    height: 100%;
    min-height: 0;
    transition: grid-template-columns var(--transition);
}

.page-studio.studio-sidebar-collapsed .studio-shell {
    grid-template-columns: 68px minmax(0, 1fr);
}

.studio-left,
.studio-card,
.studio-canvas-page {
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: var(--bg-card);
    box-shadow: var(--shadow);
}

.studio-left {
    padding: 10px;
    height: 100%;
    min-height: 0;
    overflow: hidden;
}

.studio-main {
    min-width: 0;
    min-height: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.studio-detail-stage {
    flex: 1;
    min-height: 0;
}

.studio-task-home-page {
    overflow: auto;
}

.studio-task-home {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-height: 100%;
}

.studio-task-hero,
.studio-task-form,
.studio-task-card,
.studio-task-empty,
.studio-task-detail-bar {
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: var(--bg-card);
    box-shadow: var(--shadow);
    color: var(--text-primary);
}

.studio-task-hero {
    padding: 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    background:
        radial-gradient(circle at top left, rgba(76, 175, 80, 0.12), transparent 34%),
        linear-gradient(135deg, var(--bg-card), var(--bg-input));
}

.studio-task-hero h2 {
    margin: 0 0 8px;
    font-size: 28px;
}

.studio-task-hero p {
    margin: 0;
    color: var(--text-secondary);
    max-width: 760px;
    line-height: 1.7;
}

.studio-task-form {
    padding: 16px;
}

.studio-task-form-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.9fr 1.3fr;
    gap: 12px;
}

.studio-task-form-actions,
.studio-task-card-actions,
.studio-task-detail-actions,
.studio-task-list-head,
.studio-task-card-head,
.studio-task-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.studio-task-form-actions {
    margin-top: 12px;
    justify-content: flex-end;
}

.studio-task-list-head h3 {
    margin: 0;
}

.studio-task-list-head span,
.studio-task-meta,
.studio-task-card p,
.studio-task-detail-bar span {
    color: var(--text-secondary);
    font-size: 13px;
}

.studio-task-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 14px;
}

.studio-task-card {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.studio-task-card-head strong {
    display: block;
    font-size: 16px;
}

.studio-task-card-head span {
    display: block;
    color: var(--text-secondary);
    font-size: 12px;
    margin-top: 4px;
}

.studio-task-status {
    flex-shrink: 0;
    padding: 5px 9px;
    border-radius: 999px;
    font-style: normal;
    font-size: 12px;
    color: var(--accent);
    background: var(--glass);
    border: 1px solid rgba(124, 77, 255, 0.22);
}

.studio-task-status.status-generating {
    color: var(--warning);
    border-color: rgba(255, 152, 0, 0.28);
    background: rgba(255, 152, 0, 0.09);
}

.studio-task-status.status-completed {
    color: var(--success);
    border-color: rgba(76, 175, 80, 0.3);
    background: rgba(76, 175, 80, 0.1);
}

.studio-task-status.status-failed {
    color: var(--danger);
    border-color: rgba(244, 67, 54, 0.3);
    background: rgba(244, 67, 54, 0.1);
}

.studio-task-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.studio-task-stats b {
    border-radius: 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 10px;
    font-size: 22px;
}

.studio-task-stats small {
    display: block;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
    margin-top: 3px;
}

.studio-task-empty {
    padding: 38px;
    display: grid;
    place-items: center;
    text-align: center;
    gap: 8px;
}

.studio-task-detail-bar {
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-shrink: 0;
}

.studio-task-detail-bar strong {
    display: block;
    font-size: 15px;
}

.studio-side-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding-bottom: 10px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.studio-side-title strong,
.studio-side-title span {
    display: block;
}

.studio-side-title strong {
    font-size: 14px;
}

.studio-side-title span {
    color: var(--text-muted);
    font-size: 11px;
    margin-top: 2px;
}

.studio-collapse-btn {
    width: 30px;
    height: 30px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-secondary);
    font-size: 20px;
    line-height: 1;
}

.studio-collapse-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.studio-stepper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.studio-step {
    display: grid;
    grid-template-columns: 28px 1fr;
    align-items: center;
    gap: 8px;
    padding: 9px;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    background: var(--bg-input);
    text-align: left;
    transition: all var(--transition);
}

.studio-step span {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.studio-step strong {
    font-size: 13px;
    color: var(--text-secondary);
}

.studio-step.active {
    border-color: var(--accent);
    background: var(--glass);
}

.studio-step.active span {
    background: var(--accent);
    color: #fff;
}

.studio-step.active strong { color: var(--text-primary); }

.studio-step.done span {
    background: rgba(76,175,80,0.16);
    color: var(--success);
    border-color: rgba(76,175,80,0.35);
}

.studio-summary {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border-color);
}

.studio-summary-head,
.studio-selected-head,
.studio-card-head,
.studio-canvas-toolbar,
.studio-nav-actions,
.studio-action-row,
.studio-node-actions,
.studio-toolbar-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.studio-link-btn {
    font-size: 12px;
    color: var(--accent);
}

.studio-summary-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 0;
    color: var(--text-secondary);
    border-bottom: 1px dashed var(--border-color);
}

.studio-summary-row b {
    color: var(--text-primary);
    font-size: 16px;
}

.studio-branch-box {
    margin-top: 14px;
    border-radius: 16px;
    padding: 14px;
    background: linear-gradient(135deg, var(--glass), rgba(124,77,255,0.08));
    border: 1px solid var(--border-color);
}

.studio-branch-box span,
.studio-branch-box small {
    display: block;
    color: var(--text-secondary);
}

.studio-branch-box strong {
    display: block;
    font-size: 32px;
    line-height: 1.1;
}

.studio-card,
.studio-canvas-page {
    padding: 14px;
    height: 100%;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

.studio-card-head {
    margin-bottom: 12px;
    flex-shrink: 0;
}

.studio-card-head h2,
.studio-canvas-toolbar h2 {
    font-size: 24px;
    margin: 0;
}

.studio-step-content {
    flex: 1;
    min-height: 0;
    overflow: auto;
    padding-right: 2px;
}

.studio-card-note,
.studio-info-strip {
    color: var(--text-secondary);
    font-size: 13px;
}

.studio-info-strip {
    padding: 12px 14px;
    border-radius: 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    margin-bottom: 10px;
    flex-shrink: 0;
}

.studio-generation-summary {
    display: inline-flex;
    margin-left: 10px;
    color: var(--text-primary);
    font-weight: 600;
}

.studio-grid-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 18px;
}

.studio-grid-layout h3,
.studio-selected h3 {
    font-size: 15px;
    margin-bottom: 10px;
}

.studio-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.studio-field span {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.studio-field input,
.studio-field select,
.studio-textarea {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-input);
    color: var(--text-primary);
    padding: 10px 12px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.studio-field input {
    min-height: 42px;
}

.studio-field input::placeholder,
.studio-textarea::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

.studio-field input:focus,
.studio-field select:focus,
.studio-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.studio-field select option {
    background: var(--bg-card);
    color: var(--text-primary);
}

.studio-textarea {
    min-height: 86px;
    resize: vertical;
    margin-top: 10px;
}

.studio-textarea-tall { min-height: 150px; }

.studio-action-row {
    justify-content: flex-start;
    margin-top: 10px;
    flex-wrap: wrap;
}

.studio-preset-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.studio-preset {
    text-align: left;
    padding: 13px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    min-height: 120px;
    transition: all var(--transition);
}

.studio-preset:hover {
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.studio-preset.active {
    border-color: var(--accent);
    background: var(--glass);
    box-shadow: 0 0 0 1px var(--accent-glow);
}

.studio-preset strong {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
}

.studio-preset span {
    display: block;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.45;
}

.studio-preset em {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 10px;
    font-style: normal;
}

.studio-preset i {
    font-style: normal;
    font-size: 11px;
    color: var(--accent);
    border: 1px solid var(--border-hover);
    border-radius: 999px;
    padding: 2px 7px;
}

.studio-upload-zone {
    min-height: 260px;
    border: 1px dashed var(--border-hover);
    border-radius: 20px;
    background:
        radial-gradient(circle at center, var(--accent-glow), transparent 54%),
        var(--bg-input);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.studio-upload-zone input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.studio-upload-icon {
    width: 78px;
    height: 78px;
    border-radius: 24px;
    display: grid;
    place-items: center;
    background: var(--glass);
    color: var(--accent);
    font-weight: 800;
}

.studio-upload-zone span { color: var(--text-secondary); }

.studio-selected {
    margin-top: 18px;
}

.studio-selected h3 span {
    color: var(--accent);
}

.studio-selected-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 10px;
}

.studio-selected-item {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr) 28px;
    gap: 10px;
    align-items: start;
    padding: 10px;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    overflow: hidden;
}

.studio-selected-item img,
.studio-selected-ph {
    width: 58px;
    height: 58px;
    border-radius: 12px;
    object-fit: cover;
    background: var(--bg-card);
    flex-shrink: 0;
}

.studio-selected-ph {
    display: grid;
    place-items: center;
    font-size: 11px;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.studio-selected-item strong {
    display: block;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.studio-selected-item span {
    display: -webkit-box;
    color: var(--text-muted);
    font-size: 11.5px;
    line-height: 1.35;
    white-space: normal;
    overflow: hidden;
    word-break: break-word;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.studio-selected-item > div {
    min-width: 0;
    overflow: hidden;
}

.studio-selected-item button {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(244,67,54,0.12);
    color: var(--danger);
    align-self: start;
    flex-shrink: 0;
}

.studio-empty {
    padding: 18px;
    text-align: center;
    color: var(--text-muted);
    border: 1px dashed var(--border-color);
    border-radius: 14px;
    background: var(--bg-input);
}

.studio-nav-actions {
    justify-content: flex-end;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.studio-canvas-page { overflow: hidden; }

.studio-canvas-toolbar {
    margin-bottom: 10px;
    flex-shrink: 0;
}

.studio-canvas-wrap {
    position: relative;
    overflow: auto;
    flex: 1;
    min-height: 0;
    border-radius: 18px;
    border: 1px solid var(--border-color);
    background:
        linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
        var(--bg-primary);
    background-size: 28px 28px, 28px 28px, auto;
    cursor: grab;
}

.studio-canvas-wrap.panning {
    cursor: grabbing;
}

.studio-canvas-wrap.panning * {
    cursor: grabbing !important;
    user-select: none;
}

.page-studio.studio-sidebar-collapsed .studio-side-title,
.page-studio.studio-sidebar-collapsed .studio-step strong,
.page-studio.studio-sidebar-collapsed .studio-summary {
    display: none;
}

.page-studio.studio-sidebar-collapsed .studio-left {
    padding: 10px 8px;
}

.page-studio.studio-sidebar-collapsed .studio-side-head {
    justify-content: center;
}

.page-studio.studio-sidebar-collapsed .studio-step {
    grid-template-columns: 1fr;
    justify-items: center;
    padding: 8px 6px;
}

.studio-tree-canvas {
    min-width: max-content;
    padding: 28px;
    transform-origin: 0 0;
    transition: transform 0.16s ease;
    will-change: transform;
}

.studio-zoom-label {
    min-width: 48px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 700;
}

.studio-tree-level {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.studio-tree-group {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    align-items: start;
    column-gap: 42px;
    position: relative;
}

.studio-tree-group::after {
    content: "";
    position: absolute;
    left: 260px;
    top: 92px;
    width: 42px;
    border-top: 1px solid var(--border-hover);
}

.studio-tree-group.leaf {
    grid-template-columns: 260px;
}

.studio-tree-group.leaf::after {
    display: none;
}

.studio-tree-children {
    position: relative;
    padding-left: 0;
}

.studio-tree-children::before {
    content: "";
    position: absolute;
    left: -21px;
    top: 92px;
    bottom: 92px;
    border-left: 1px solid var(--border-hover);
}

.studio-branch-node {
    position: relative;
    width: 260px;
    min-height: 282px;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background: var(--bg-card);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.studio-branch-node.result {
    border-color: rgba(76,175,80,0.42);
}

.studio-branch-node.reference {
    border-style: dashed;
    background: color-mix(in srgb, var(--bg-card) 82%, var(--bg-input));
}

.studio-branch-node.reference .studio-branch-label::after {
    content: " · 参考";
    color: var(--text-muted);
}

.studio-branch-node.result .studio-branch-label::after {
    content: " · 合成";
    color: var(--success);
}

.studio-branch-node.status-queued,
.studio-branch-node.status-submitting,
.studio-branch-node.status-pending {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent-glow), var(--shadow);
}

.studio-branch-node.status-success {
    border-color: rgba(76,175,80,0.72);
}

.studio-branch-node.status-failed {
    border-color: rgba(244,67,54,0.72);
}

.studio-branch-node.video {
    border-color: var(--accent);
}

.studio-branch-label {
    padding: 8px 11px;
    background: var(--bg-input);
    color: var(--text-secondary);
    font-size: 12px;
    border-bottom: 1px solid var(--border-color);
}

.studio-branch-body {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 11px;
    align-items: stretch;
}

.studio-branch-body img,
.studio-branch-body video,
.studio-node-icon {
    width: 100%;
    height: 168px;
    border-radius: 14px;
    object-fit: contain;
    background: var(--bg-input);
}

.studio-branch-body img,
.studio-branch-body video {
    display: block;
    border: 1px solid var(--border-color);
}

.studio-branch-body img[data-studio-preview] {
    cursor: zoom-in;
}

.studio-branch-body img[data-studio-preview]:hover {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.studio-node-refs {
    display: grid;
    gap: 7px;
    padding: 8px;
    border: 1px dashed var(--border-color);
    border-radius: 13px;
    background: color-mix(in srgb, var(--bg-input) 82%, transparent);
}

.studio-node-ref {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    min-width: 0;
}

.studio-node-ref img,
.studio-node-ref-text {
    width: 42px;
    height: 42px;
    border-radius: 9px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    object-fit: contain;
}

.studio-node-ref-text {
    display: grid;
    place-items: center;
    color: var(--accent);
    font-size: 10px;
    text-align: center;
    line-height: 1.15;
    padding: 3px;
}

.studio-node-ref b {
    display: block;
    color: var(--text-secondary);
    font-size: 11px;
    line-height: 1.2;
}

.studio-node-ref span {
    display: block;
    min-height: 0;
    max-height: 16px;
    margin-top: 2px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    font-size: 10.5px;
    color: var(--text-muted);
}

.studio-node-icon {
    display: grid;
    place-items: center;
    font-size: 13px;
    color: var(--accent);
    border: 1px solid var(--border-hover);
}

.studio-branch-node.status-queued .studio-node-icon,
.studio-branch-node.status-submitting .studio-node-icon,
.studio-branch-node.status-pending .studio-node-icon {
    animation: studioPulse 1.2s ease-in-out infinite;
}

.studio-branch-body strong {
    display: block;
    font-size: 13px;
    line-height: 1.25;
    max-height: 34px;
    overflow: hidden;
}

.studio-branch-body span {
    display: block;
    color: var(--text-muted);
    font-size: 11px;
    line-height: 1.35;
    min-height: 30px;
    max-height: 45px;
    white-space: normal;
    overflow: hidden;
    margin-top: 3px;
}

.studio-node-actions {
    justify-content: flex-start;
    gap: 6px;
    padding: 8px 0 0;
    border-top: 1px dashed var(--border-color);
}

.studio-node-actions button {
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 3px 8px;
    color: var(--text-secondary);
    font-size: 11px;
}

.studio-node-actions button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.studio-node-actions button:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.studio-node-actions button.active {
    color: #fff;
    border-color: var(--success);
    background: var(--success);
}

.studio-node-status {
    margin: 0 9px 9px;
    border-radius: 999px;
    padding: 4px 8px;
    background: var(--bg-input);
    color: var(--accent);
    font-size: 11px;
}

.studio-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 4300;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 22px;
    background: rgba(0, 0, 0, 0.58);
    backdrop-filter: blur(12px);
}

.studio-modal {
    width: min(560px, 94vw);
    border: 1px solid var(--border-color);
    border-radius: 22px;
    background:
        radial-gradient(circle at 14% 0%, var(--accent-glow), transparent 34%),
        var(--bg-card);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
    overflow: hidden;
}

.studio-modal-small {
    width: min(440px, 94vw);
}

.studio-modal-head,
.studio-modal-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 18px;
}

.studio-modal-head {
    border-bottom: 1px solid var(--border-color);
}

.studio-modal-head h3 {
    margin: 0;
    font-size: 20px;
}

.studio-modal-head button {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-input);
    color: var(--text-secondary);
    font-size: 18px;
}

.studio-modal-body {
    padding: 18px;
}

.studio-modal-body p {
    margin: 12px 0 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.studio-output-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.studio-cost-card {
    margin-top: 14px;
    padding: 14px;
    border-radius: 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
}

.studio-cost-card.compact {
    margin-top: 0;
}

.studio-cost-card span,
.studio-cost-card em {
    display: block;
    color: var(--text-secondary);
    font-size: 12px;
    font-style: normal;
}

.studio-cost-card strong {
    display: block;
    margin: 4px 0;
    color: var(--accent);
    font-size: 24px;
}

.studio-modal-foot {
    justify-content: flex-end;
    border-top: 1px solid var(--border-color);
}

.studio-preview-lightbox {
    z-index: 4400;
}

.studio-preview-content {
    width: min(94vw, 1280px);
    max-width: 94vw;
    max-height: 92vh;
}

.studio-preview-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
    color: #fff;
}

.studio-preview-title {
    font-size: 14px;
    font-weight: 600;
    word-break: break-word;
}

.studio-preview-count {
    flex: 0 0 auto;
    border-radius: 999px;
    padding: 5px 10px;
    background: rgba(255, 255, 255, 0.14);
    color: rgba(255, 255, 255, 0.86);
    font-size: 12px;
}

.studio-preview-image {
    position: relative;
    min-width: min(92vw, 720px);
    min-height: min(78vh, 520px);
    background: rgba(9, 12, 20, 0.92);
}

.studio-preview-image img {
    max-width: 100%;
    max-height: 82vh;
    object-fit: contain;
    border-radius: var(--radius);
}

.studio-preview-nav {
    position: absolute;
    top: 50%;
    z-index: 2;
    width: 46px;
    height: 64px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    font-size: 44px;
    line-height: 1;
    transform: translateY(-50%);
    backdrop-filter: blur(10px);
}

.studio-preview-nav:hover {
    background: rgba(255, 255, 255, 0.24);
}

.studio-preview-nav.prev {
    left: 16px;
}

.studio-preview-nav.next {
    right: 16px;
}

@keyframes studioPulse {
    0%, 100% { opacity: 0.55; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.04); }
}

@media (max-width: 1180px) {
    .studio-shell {
        grid-template-columns: 1fr;
    }

    .studio-task-form-grid {
        grid-template-columns: 1fr 1fr;
    }

    .studio-left {
        position: static;
    }

    .studio-stepper {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 760px) {
    .studio-task-hero,
    .studio-task-detail-bar,
    .studio-task-detail-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .studio-task-form-grid,
    .studio-task-grid {
        grid-template-columns: 1fr;
    }

    .studio-grid-layout {
        grid-template-columns: 1fr;
    }

    .studio-preset-grid,
    .studio-form-grid {
        grid-template-columns: 1fr;
    }

    .studio-tree-canvas {
        padding: 18px;
    }

    .studio-tree-group,
    .studio-tree-group.leaf {
        grid-template-columns: 230px;
        row-gap: 12px;
    }

    .studio-tree-group::after,
    .studio-tree-children::before {
        display: none;
    }

    .studio-tree-children {
        padding-left: 20px;
        border-left: 1px solid var(--border-color);
    }

    .studio-branch-node {
        width: 230px;
        min-height: 210px;
    }

    .studio-branch-body img,
    .studio-branch-body video,
    .studio-node-icon {
        height: 148px;
    }

    .studio-preview-image {
        min-width: 92vw;
        min-height: 60vh;
    }

    .studio-preview-nav {
        width: 38px;
        height: 52px;
        font-size: 36px;
    }
}