:root {
        --bg: #0f1115;
        --panel: #151924;
        --panel-2: #1b2030;
        --text: #e6e8ef;
        --muted: #aab0c0;
        --accent: #4f8ef7;
        --accent-2: #7cc5ff;
        --danger: #ff6b6b;
        --ok: #3ecf8e;
        --border: #273044;
        --highlight: #ffd166;
        --scrollbar-thumb: rgba(255,255,255,0.28);
        --scrollbar-thumb-hover: rgba(255,255,255,0.36);
        --scrollbar-track: rgba(9,13,22,0.35);
      }
      html, body { height: 100%; }
      body {
        margin: 0;
        font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
        color: var(--text);
        background: linear-gradient(180deg, #0e121a 0%, #0b0e14 100%);
        color-scheme: dark light;
      }
      .app {
        display: grid;
        grid-template-rows: auto 1fr auto;
        min-height: 100vh;
      }
      header {
        display: flex;
        align-items: center;
        gap: 16px;
        padding: 12px 16px;
        background: rgba(21, 25, 36, 0.9);
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 5;
        backdrop-filter: blur(6px);
      }
      header h1,
      header .hint { display: none; }
      .hint { color: var(--muted); font-size: 12px; }

      .toolbar,
      .toolbar--inline {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-left: auto;
      }
      .toolbar .group,
      .toolbar--inline .group { display: flex; align-items: center; gap: 8px; }
      .toolbar label,
      .toolbar--inline label { font-size: 12px; color: var(--muted); }
      .toolbar .toggle,
      .toolbar--inline .toggle { display: inline-flex; align-items: center; gap: 4px; }
      .toolbar .toggle input,
      .toolbar--inline .toggle input { accent-color: var(--accent); }
      .toolbar input[type=number],
      .toolbar--inline input[type=number] {
        width: 72px; padding: 6px 8px; border-radius: 8px; border: 1px solid var(--border);
        background: var(--panel-2); color: var(--text);
      }
      .panel-header--preview {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: wrap;
      }
      .panel-header--preview .history-toolbar {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        align-items: center;
      }
      .panel-header--preview .history-toolbar button {
        flex: 0 1 auto;
        min-width: 120px;
      }
      .panel-header--preview .toolbar--inline {
        flex: 1 1 360px;
        justify-content: flex-end;
        gap: 12px;
        flex-wrap: wrap;
        margin-left: auto;
      }
      .panel-header--preview .toolbar--inline .group {
        display: flex;
        align-items: center;
        gap: 8px;
        flex-wrap: wrap;
      }
      .panel-header--preview .toolbar--inline .group:first-child {
        flex: 1 1 220px;
        justify-content: flex-end;
      }
      button {
        background: linear-gradient(180deg, #2a3a66, #203055);
        color: white; border: 1px solid #30416b; border-bottom-color: #1c2844;
        padding: 8px 12px; border-radius: 10px; cursor: pointer; font-weight: 600;
      }
      button.secondary { background: var(--panel); border-color: var(--border); color: var(--text); }
      button.danger { background: linear-gradient(180deg, #8b2c2c, #722323); border-color: #8b2c2c; }
      button:disabled { opacity: 0.5; cursor: not-allowed; }

      .color-input {
        position: relative;
        display: inline-flex;
        width: 44px;
        height: 30px;
        border-radius: 8px;
        border: 1px solid var(--border);
        background: var(--panel-2);
        overflow: hidden;
        flex: 0 0 auto;
      }
      .color-input--compact {
        width: 34px;
        height: 28px;
        border-radius: 6px;
      }
      .color-input input[type=color] {
        appearance: none;
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        border: none;
        padding: 0;
        background: transparent;
        cursor: pointer;
        opacity: 0;
      }
      .color-input::before {
        content: '';
        position: absolute;
        inset: 0;
        background:
          conic-gradient(
            rgba(17, 20, 30, 0.7) 25%,
            rgba(230, 232, 239, 0.18) 0 50%,
            rgba(17, 20, 30, 0.7) 0 75%,
            rgba(230, 232, 239, 0.18) 0
          ) 0 0 / 10px 10px;
      }
      .color-input__swatch {
        position: absolute;
        inset: 0;
        pointer-events: none;
        border-radius: inherit;
        background: var(--swatch-color, transparent);
        transition: opacity 0.12s ease;
      }
      .color-input[data-transparent="1"] .color-input__swatch {
        opacity: 0;
      }
      .color-input.is-disabled {
        opacity: 0.45;
        cursor: not-allowed;
      }
      .color-input.is-disabled input[type=color] {
        cursor: not-allowed;
      }

      main {
        display: grid;
        grid-template-columns: 360px minmax(0, 1fr) 260px 260px;
        grid-template-rows: minmax(0, 1fr) auto;
        grid-template-areas:
          "input preview layers inspector"
          "export preview layers inspector";
        grid-gap: 16px;
        padding: 12px;
        min-height: 0;
      }
      .input-panel { grid-area: input; display: flex; flex-direction: column; }
      .export-panel { grid-area: export; display: flex; flex-direction: column; }
      .preview-wrap { grid-area: preview; }
      .layer-panel { grid-area: layers; }
      .inspector-panel { grid-area: inspector; }
      .code-body { flex: 1 1 auto; display: flex; flex-direction: column; gap: 10px; min-height: 0; }
      .input-panel .live-code-wrapper { flex: 1 1 100%; min-height: 360px; }
      .panel-block {
        background: rgba(21, 25, 36, 0.55);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 12px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
      }
      .panel-block:focus-within {
        border-color: var(--highlight);
        box-shadow: 0 0 0 2px rgba(79, 142, 247, 0.3);
      }
      .code-body .live-code-wrapper { position: relative; flex: 1 1 auto; display: flex; flex-direction: column; min-height: 0; background: rgba(21, 25, 36, 0.55); border: 1px solid var(--border); border-radius: 12px; padding: 12px; gap: 8px; overflow: hidden; }
      .code-body #liveSvgEditor { flex: 1 1 auto; min-height: 0; box-sizing: border-box; scrollbar-width: thin; scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track); }
      .code-body .preview-code-status { align-self: flex-end; font-size: 11px; color: var(--muted); }
      .export-body { flex: 1 1 auto; display: flex; flex-direction: column; gap: 10px; }
      .export-controls { display: flex; flex-direction: column; gap: 12px; }
      .export-size-row { display: grid; grid-template-columns: auto 1fr auto 1fr auto; gap: 8px; align-items: center; }
      .export-size-row label { font-size: 12px; color: var(--muted); white-space: nowrap; }
      .export-size-row input[type=number] { width: 100%; }
      .export-actions { display: flex; gap: 8px; flex-wrap: wrap; }
      .panel-block textarea,
      #liveSvgEditor { scrollbar-width: thin; scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track); }
      .panel-block textarea::-webkit-scrollbar,
      #liveSvgEditor::-webkit-scrollbar { width: 8px; height: 8px; }
      .panel-block textarea::-webkit-scrollbar-thumb,
      #liveSvgEditor::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 999px; border: 2px solid transparent; }
      .panel-block textarea::-webkit-scrollbar-thumb:hover,
      #liveSvgEditor::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-thumb-hover); }
      .panel-block textarea::-webkit-scrollbar-track,
      #liveSvgEditor::-webkit-scrollbar-track { background: var(--scrollbar-track); border-radius: 999px; }
      .panel-block textarea {
        background: transparent !important;
        border: none;
        padding: 0;
        min-height: 0;
        resize: vertical;
        color: var(--text);
        white-space: pre;
        overflow: auto;
        line-height: 1.5;
      }
      .panel-block textarea:focus-visible {
        outline: none;
      }
      .panel {
        background: rgba(21, 25, 36, 0.7);
        border: 1px solid var(--border);
        border-radius: 12px;
        display: flex;
        flex-direction: column;
        min-height: 0;
      }
      .panel h2 {
        font-size: 13px; font-weight: 700; letter-spacing: 0.4px; color: var(--muted);
        padding: 10px 12px; margin: 0; border-bottom: 1px solid var(--border);
        border-top-left-radius: 12px;
        border-top-right-radius: 12px;
      }
      .panel .body { padding: 10px; overflow: auto; display: flex; flex-direction: column; gap: 8px; border-bottom-left-radius: 12px; border-bottom-right-radius: 12px; min-height: 0; }
      textarea {
        width: 100%; min-height: 240px; resize: vertical;
        background: var(--panel-2); color: var(--text);
        border: 1px solid var(--border); border-radius: 12px;
        padding: 12px; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size: 12px; line-height: 1.5;
        box-sizing: border-box; white-space: pre; overflow: auto;
      }

      .preview-wrap { position: relative; display: flex; flex-direction: column; min-height: 0; }
      .preview-toolbar {
        display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-bottom: 1px solid var(--border); justify-content: space-between; flex-wrap: wrap;
      }
      .preview {
        position: relative; flex: 1 1 auto; overflow: auto; display: grid; place-items: center;
        background: repeating-conic-gradient(rgba(34,38,56,0.42) 0% 25%, rgba(26,31,44,0.34) 0% 50%) 50% / 20px 20px;
        border-bottom-left-radius: 12px; border-bottom-right-radius: 12px;
      }
      .preview svg { cursor: default; }
      .preview-inner { position: relative; margin: 12px; }
      .preview.drawing-mode, .preview.drawing-mode svg { cursor: crosshair; }
      .preview svg.move-cursor { cursor: move; }
      .preview svg.resize-cursor-nwse { cursor: nwse-resize; }
      .preview svg.resize-cursor-nesw { cursor: nesw-resize; }
      .preview svg.resize-cursor-ns { cursor: ns-resize; }
      .preview svg.resize-cursor-ew { cursor: ew-resize; }
      .preview svg { background: transparent; }

      .layer-body { display: flex; flex-direction: column; gap: 16px; min-height: 0; }
      .layer-list { flex: 1 1 auto; border: 1px solid var(--border); border-radius: 12px; background: var(--panel-2); padding: 4px 0; min-height: clamp(260px, 45vh, 420px); overflow-y: auto; box-shadow: inset 0 1px 0 rgba(255,255,255,0.04); scrollbar-width: thin; scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track); }
      .layer-list::-webkit-scrollbar { width: 8px; height: 8px; }
      .layer-list::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 999px; }
      .layer-list::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-thumb-hover); }
      .layer-list::-webkit-scrollbar-track { background: var(--scrollbar-track); border-radius: 999px; }
      .layer-controls { border: 1px solid var(--border); border-radius: 12px; background: var(--panel-2); padding: 10px 12px; display: flex; flex-direction: column; gap: 8px; box-shadow: inset 0 1px 0 rgba(255,255,255,0.04); flex-shrink: 0; }
      .layer-controls h3 { margin: 0; font-size: 12px; letter-spacing: 0.2px; color: var(--muted); }
      .layer-controls .layer-create { display: flex; }
      .layer-controls .layer-create button { flex: 1; }
      .layer-controls .layer-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
      .layer-controls .layer-duplicate { display: flex; }
      .layer-controls .layer-duplicate button { flex: 1; }
      .layer-controls button { font-size: 12px; padding: 6px 8px; border-radius: 8px; }
      .layer-controls .layer-delete { display: flex; }
      .layer-controls .layer-delete button { flex: 1; font-size: 12px; padding: 6px 8px; }
      .inspector-panel .body { padding: 12px; overflow-y: auto; }
      .inspector-panel .inspector { display: flex; flex-direction: column; gap: 16px; }
      .modal-backdrop { position: fixed; inset: 0; background: rgba(10, 12, 18, 0.68); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; z-index: 40; padding: 16px; }
      .modal { background: var(--panel-2); border: 1px solid var(--border); border-radius: 16px; padding: 18px 20px; width: min(360px, 92vw); display: flex; flex-direction: column; gap: 12px; box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45); }
      .modal h3 { margin: 0; font-size: 15px; color: var(--text); }
      .modal p { margin: 0; font-size: 12px; color: var(--muted); line-height: 1.5; }
      .modal-option-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; }
      .modal-option-grid button { font-size: 13px; padding: 10px 12px; border-radius: 10px; text-align: center; }
      .modal-actions { display: flex; justify-content: flex-end; gap: 8px; }

      .list { list-style: none; margin: 0; padding: 0; font-size: 12px; color: var(--muted); }
      .list li { --depth: 0; position: relative; display: flex; align-items: center; gap: 6px; padding: 6px 12px 6px calc(22px + var(--depth) * 16px); border-bottom: 1px dashed rgba(255,255,255,0.06); cursor: pointer; transition: background 0.15s ease; }
      .list li:last-child { border-bottom: none; }
      .list li:hover { background: rgba(127, 157, 255, 0.08); }
      .list li.active { background: rgba(127, 157, 255, 0.15); color: var(--text); }
      .list li .label { flex: 1; color: var(--text); }
      .list li.has-children .label { font-weight: 500; }
      .list li .meta { color: #8ea1c7; font-size: 11px; margin-left: auto; }
      .list li .disclosure { position: absolute; left: calc(8px + var(--depth) * 16px); width: 14px; height: 14px; border: none; background: none; padding: 0; display: flex; align-items: center; justify-content: center; color: var(--muted); cursor: pointer; }
      .list li .disclosure:focus-visible { outline: 2px solid var(--highlight); outline-offset: 1px; border-radius: 3px; }
      .list li .disclosure::before { content: ''; width: 0; height: 0; border-style: solid; border-width: 4px 0 4px 6px; border-color: transparent transparent transparent currentColor; transform: rotate(90deg); transition: transform 0.18s ease; }
      .list li.collapsed .disclosure::before { transform: rotate(0deg); }
      .list li.collapsed .label { color: #9aa8c9; }
      .list li.dragging { opacity: 0.45; }
      .list li.drop-before, .list li.drop-after, .list li.drop-inside { box-shadow: none; }
      .list li.drop-before::after,
      .list li.drop-after::after,
      .list.drop-root::after {
        content: '';
        position: absolute;
        left: 12px;
        right: 12px;
        height: 2px;
        background: var(--highlight);
        border-radius: 1px;
        opacity: 0.9;
      }
      .list li.drop-before::after { top: 0; }
      .list li.drop-after::after { bottom: 0; }
      .list li.drop-inside::after { content: none; }
      .list li.drop-inside::before {
        content: '';
        position: absolute;
        left: 12px;
        right: 12px;
        top: 4px;
        bottom: 4px;
        border-radius: 8px;
        border: 1px solid rgba(255, 209, 102, 0.7);
        background: rgba(255, 209, 102, 0.12);
        pointer-events: none;
      }
      .list.drop-root { position: relative; box-shadow: none; }
      .list.drop-root::after { bottom: 0; }

      .inspector label { font-size: 12px; color: var(--muted); }
      .inspector-panel .inspector { border: 1px solid var(--border); border-radius: 12px; padding: 16px 14px; background: var(--panel-2); box-shadow: inset 0 1px 0 rgba(255,255,255,0.03); }
      .inspector .row { display: flex; align-items: center; gap: 8px; }
      .inspector input[type="text"], .inspector input[type="number"], .inspector select {
        background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px;
      }
      .inspector .grid { display: flex; flex-direction: column; gap: 10px; }
      .inspector .grid .meta-row { display: flex; align-items: center; gap: 8px; }
      .inspector .grid .meta-row label { width: 54px; font-size: 12px; color: var(--muted); }
      .inspector .grid .meta-row input { flex: 1 1 auto; padding: 6px 8px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel-2); color: var(--text); }
      .inspector .actions { display: flex; gap: 8px; flex-wrap: wrap; }
      .inspector .selection-breadcrumb { font-size: 12px; color: var(--muted); margin-bottom: 12px; line-height: 1.4; }
      .inspector .selection-breadcrumb .crumb-current { color: var(--text); font-weight: 600; }
      .inspector .props { margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }
      .inspector .props .prop-section { border-top: 1px solid var(--border); padding-top: 12px; }
      .inspector .props .prop-section:first-child { border-top: none; padding-top: 0; }
      .inspector .prop-section { border-top: 1px solid var(--border); padding-top: 10px; }
      .inspector .prop-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
      .inspector .prop-row:last-child { margin-bottom: 0; }
      .inspector .prop-row label { width: 90px; font-size: 11px; color: var(--muted); }
      .inspector .prop-row textarea { min-height: 64px; resize: vertical; font-family: var(--font); }
      .inspector .prop-empty { font-size: 12px; color: var(--muted); padding: 8px 0; }
      .input-actions { display: flex; flex-wrap: wrap; gap: 8px; }
      .input-actions button { flex: 0 0 auto; }
      .file-input { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); border: 0; }
      .panel-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px; border-bottom: 1px solid var(--border); }
      .panel-header h2 { margin: 0; padding: 0; border: 0; font-size: 13px; font-weight: 700; letter-spacing: 0.4px; color: var(--muted); }
      .history-toolbar { display: flex; gap: 8px; margin-left: auto; }
      .history-toolbar button { min-width: 96px; }
      .preview-code { border-top: 1px solid var(--border); padding: 10px; background: rgba(21, 25, 36, 0.55); display: flex; flex-direction: column; gap: 8px; }
      .preview-code-header { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
      .preview-code-title { font-size: 12px; font-weight: 600; letter-spacing: 0.3px; color: var(--muted); }
      .preview-code-status { font-size: 11px; color: var(--muted); min-height: 14px; transition: color 0.2s ease; }
      .preview-code-status.is-error { color: var(--danger); }
      .preview-code-status.is-success { color: var(--ok); }
      .live-code-wrapper { position: relative; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); overflow: hidden; }
      #liveSvgEditor {
        min-height: 200px;
        font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
        font-size: 12px;
        line-height: 1.5;
        background: transparent !important;
        border: none;
        resize: vertical;
        padding: 10px;
        color: var(--text);
        position: relative;
        z-index: 1;
        white-space: pre;
        overflow: auto;
      }
      #liveSvgEditor:focus { outline: none; }
      #liveSvgLineHighlight {
        position: absolute;
        pointer-events: none;
        left: 0;
        right: 0;
        top: 0;
        height: 0;
        background: rgba(79, 142, 247, 0.12);
        border: none;
        box-shadow: none;
        opacity: 0;
        transition: opacity 0.12s ease;
        z-index: 0;
        min-width: 0;
      }
      #liveSvgHighlight {
        position: absolute;
        top: 0;
        left: 0;
        right: auto;
        bottom: 0;
        padding: 10px;
        pointer-events: none;
        white-space: pre;
        font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
        font-size: 12px;
        line-height: 1.5;
        line-height: 1.5;
        color: transparent;
        z-index: 0;
        min-width: 100%;
        width: max-content;
      }
      .gradient-editor { gap: 6px; }
      .hidden { display: none !important; }

      footer {
        font-size: 12px; color: var(--muted); padding: 12px 14px; border-top: 1px solid transparent;
        display: flex; justify-content: center; gap: 16px; align-items: center; opacity: 0.8;
      }

      html.is-embedded,
      html.is-embedded body,
      body.is-embedded {
        height: 100%;
        overflow: hidden;
      }
      html.is-embedded {
        background: transparent !important;
      }
      body.is-embedded {
        background: transparent !important;
        --panel: rgba(255, 255, 255, 0.96);
        --panel-2: rgba(255, 255, 255, 0.94);
        --text: #0f172a;
        --muted: rgba(15, 23, 42, 0.5);
        --accent: #2563eb;
        --accent-2: #60a5fa;
        --border: rgba(15, 23, 42, 0.08);
        --highlight: #f59e0b;
        --scrollbar-thumb: rgba(143, 155, 175, 0.6);
        --scrollbar-thumb-hover: rgba(110, 123, 149, 0.72);
        --scrollbar-track: rgba(229, 235, 245, 0.8);
      }
      body.is-embedded .app {
        height: 100vh;
        min-height: 100vh;
      }
      body.is-embedded footer {
        display: none;
      }
      body.is-embedded header {
        background: transparent !important;
        border-bottom: none !important;
        box-shadow: none !important;
        backdrop-filter: none !important;
      }
      body.is-embedded .panel,
      body.is-embedded .panel-block,
      body.is-embedded .layer-list,
      body.is-embedded .layer-controls,
      body.is-embedded .inspector-panel .inspector,
      body.is-embedded .preview-code {
        background: rgba(255,255,255,0.97);
        border-color: rgba(15,23,42,0.08);
      }
      body.is-embedded .preview {
        background: repeating-conic-gradient(rgba(236, 239, 245, 0.9) 0% 25%, rgba(223, 228, 240, 0.9) 0% 50%) 50% / 20px 20px;
      }
      body.is-embedded .toolbar--inline label {
        color: rgba(15,23,42,0.55);
      }

      @media (prefers-color-scheme: light) {
        :root {
          --bg: #f3f4f8;
          --panel: rgba(255, 255, 255, 0.92);
          --panel-2: rgba(255, 255, 255, 0.86);
          --text: #0f172a;
          --muted: rgba(15, 23, 42, 0.55);
          --accent: #2563eb;
          --accent-2: #60a5fa;
          --danger: #e53e3e;
          --ok: #16a34a;
          --border: rgba(15, 23, 42, 0.12);
          --highlight: #f59e0b;
          --scrollbar-thumb: rgba(120, 138, 168, 0.65);
          --scrollbar-thumb-hover: rgba(79, 102, 146, 0.78);
          --scrollbar-track: rgba(226, 232, 240, 0.7);
        }
        body {
          background: linear-gradient(180deg, #f9fbff 0%, #e6ebf5 100%);
        }
        header {
          background: rgba(255, 255, 255, 0.92);
          border-bottom: 1px solid rgba(15, 23, 42, 0.08);
          box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
        }
        .panel, .panel-block, .layer-list, .layer-controls, .inspector-panel .inspector, .preview-code {
          background: var(--panel);
          border-color: rgba(15, 23, 42, 0.12);
          color: var(--text);
        }
        .panel-block {
          background: rgba(255,255,255,0.94);
        }
        .code-body .live-code-wrapper {
          background: rgba(255,255,255,0.96);
          border-color: rgba(15, 23, 42, 0.12);
        }
        .panel h2, .panel-header h2, .preview-code-title {
          color: rgba(15, 23, 42, 0.6);
        }
        .hint, .toolbar label, footer { color: rgba(15, 23, 42, 0.55); }
        .toolbar input[type=number], .panel-block textarea, textarea, #liveSvgEditor, .inspector input, .inspector select {
          background: rgba(255,255,255,0.92);
          border: 1px solid rgba(15, 23, 42, 0.12);
          color: var(--text);
        }
        button {
          background: linear-gradient(180deg, #2563eb, #1e3a8a);
          border: 1px solid rgba(15,23,42,0.18);
        }
        button.secondary {
          background: rgba(255,255,255,0.95);
          border: 1px solid rgba(15,23,42,0.12);
          color: var(--text);
        }
        .preview {
          background: repeating-conic-gradient(#eff3fb 0% 25%, #e0e7f5 0% 50%) 50% / 20px 20px;
        }
        footer {
          color: rgba(15,23,42,0.35);
        }
      }

      /* Selection overlay */
      svg .__selection_overlay__ .bbox {
        fill: none; stroke: var(--highlight); stroke-width: 1.5; stroke-dasharray: 4 3; pointer-events: none;
      }
      svg .__selection_overlay__ .selection-outline {
        fill: none;
        stroke: var(--accent-2);
        stroke-width: 2;
        stroke-linecap: round;
        stroke-linejoin: round;
        pointer-events: none;
        vector-effect: non-scaling-stroke;
        opacity: 0.9;
      }
      svg .__selection_overlay__ .handle {
        fill: #ffffff; stroke: var(--highlight); stroke-width: 1.5; pointer-events: all; cursor: pointer; rx: 2; ry: 2;
      }
      svg .__selection_overlay__ .handle:hover { fill: var(--highlight); }
      svg .__selection_overlay__ .handle[data-dir="nw"],
      svg .__selection_overlay__ .handle[data-dir="se"] { cursor: nwse-resize; }
      svg .__selection_overlay__ .handle[data-dir="ne"],
      svg .__selection_overlay__ .handle[data-dir="sw"] { cursor: nesw-resize; }
      svg .__selection_overlay__ .handle[data-dir="n"],
      svg .__selection_overlay__ .handle[data-dir="s"] { cursor: ns-resize; }
      svg .__selection_overlay__ .handle[data-dir="e"],
      svg .__selection_overlay__ .handle[data-dir="w"] { cursor: ew-resize; }

      @media (max-width: 1500px) {
        main {
          grid-template-columns:
            minmax(280px, 320px)
            minmax(320px, 1fr)
            minmax(220px, 260px)
            minmax(220px, 260px);
          grid-template-rows: auto minmax(0, 1fr);
        }
      }

      @media (max-width: 1260px) {
        main {
          grid-template-columns:
            minmax(220px, 300px)
            minmax(260px, 1fr)
            minmax(160px, 220px)
            minmax(160px, 220px);
          grid-template-rows: auto minmax(0, 1fr);
        }
      }

      @media (max-width: 1280px) {
        .layer-list {
          min-height: 220px;
          max-height: none;
        }
      }

      @media (max-width: 1100px) {
        .panel-header--preview {
          flex-direction: column;
          align-items: stretch;
        }
        .panel-header--preview .history-toolbar {
          width: 100%;
        }
        .panel-header--preview .history-toolbar button {
          flex: 1 1 120px;
        }
        .panel-header--preview .toolbar--inline {
          width: 100%;
          justify-content: flex-start;
          margin-left: 0;
        }
        .panel-header--preview .toolbar--inline .group:first-child {
          flex: 1 1 100%;
          justify-content: flex-start;
        }
      }

      @media (max-width: 960px) {
        main {
          grid-template-columns: 1fr;
          grid-template-rows: auto;
          grid-template-areas: none;
        }
        .input-panel,
        .preview-wrap,
        .layer-panel,
        .inspector-panel,
        .export-panel {
          grid-column: auto;
          grid-row: auto;
        }
      }