@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&family=Space+Mono:wght@400;700&family=Noto+Sans+JP:wght@400;500;700&display=swap');

  :root {
    --bg: #0d0f14;
    --bg2: #141720;
    --bg3: #1c2030;
    --bg4: #242840;
    --border: #2a2f4a;
    --border2: #363c5e;
    --text: #e8eaf6;
    --text2: #9098c0;
    --text3: #5a6080;
    --accent: #6c63ff;
    --accent2: #9c94ff;
    --green: #39d98a;
    --amber: #ffb74d;
    --coral: #ff6b6b;
    --teal: #40c4aa;
    --pink: #f06292;
    --cat-8bit: #9c94ff;
    --cat-real: #ff6b6b;
    --cat-ui: #40c4aa;
    --cat-env: #39d98a;
    --mono: 'Space Mono', monospace;
    --sans: 'Noto Sans JP', sans-serif;
  }

  /* ── Themes ── */
  [data-theme="teal"] {
    --bg: #09141c; --bg2: #0e1c26; --bg3: #142530; --bg4: #1a2e3c;
    --border: #1e3040; --border2: #2a4456;
    --text2: #7ab0c0; --text3: #4a7080;
    --accent: #40c4aa; --accent2: #72d9c4;
    --cat-8bit: #72d9c4;
  }
  [data-theme="amber"] {
    --bg: #15110a; --bg2: #1e180e; --bg3: #281e12; --bg4: #322616;
    --border: #3a2c18; --border2: #4e3c22;
    --text2: #b89060; --text3: #80622e;
    --accent: #ffb74d; --accent2: #ffd080;
    --cat-8bit: #ffd080;
  }
  [data-theme="coral"] {
    --bg: #150d0d; --bg2: #1e1212; --bg3: #281818; --bg4: #321e1e;
    --border: #3a2020; --border2: #4e2c2c;
    --text2: #b87878; --text3: #805050;
    --accent: #ff6b6b; --accent2: #ff9494;
    --cat-8bit: #ff9494;
  }
  [data-theme="emerald"] {
    --bg: #0a1510; --bg2: #0e1e16; --bg3: #14271c; --bg4: #1a3022;
    --border: #1e3828; --border2: #284e38;
    --text2: #6ab080; --text3: #3a7050;
    --accent: #39d98a; --accent2: #6aeba8;
    --cat-8bit: #6aeba8;
  }
  [data-theme="rose"] {
    --bg: #150a10; --bg2: #1e0f18; --bg3: #281420; --bg4: #321a28;
    --border: #3a1e2e; --border2: #4e2840;
    --text2: #b87098; --text3: #804868;
    --accent: #f06292; --accent2: #f897b7;
    --cat-8bit: #f897b7;
  }
  [data-theme="mono"] {
    --bg: #0c0c0c; --bg2: #141414; --bg3: #1c1c1c; --bg4: #242424;
    --border: #2a2a2a; --border2: #363636;
    --text2: #909090; --text3: #585858;
    --accent: #aaaaaa; --accent2: #cccccc;
    --cat-8bit: #cccccc; --cat-real: #cccccc; --cat-ui: #cccccc; --cat-env: #cccccc;
  }

  /* ── Pixel themes ── */
  [data-theme="pixel"],
  [data-theme="pixel-amber"] {
    --mono: 'Press Start 2P', monospace;
  }
  [data-theme="pixel"] {
    --bg: #000000; --bg2: #070d07; --bg3: #0d180d; --bg4: #142414;
    --border: #1a4a1a; --border2: #2a6a2a;
    --text: #33ff33; --text2: #22cc22; --text3: #116611;
    --accent: #00ff41; --accent2: #88ffaa;
    --cat-8bit: #88ffaa; --cat-real: #00ff41; --cat-ui: #00cc33; --cat-env: #009922;
  }
  [data-theme="pixel-amber"] {
    --bg: #0a0700; --bg2: #130e00; --bg3: #1c1600; --bg4: #261e00;
    --border: #4a3800; --border2: #6a5200;
    --text: #ffcc00; --text2: #cc9900; --text3: #886600;
    --accent: #ffaa00; --accent2: #ffdd66;
    --cat-8bit: #ffdd66; --cat-real: #ff8800; --cat-ui: #ffcc00; --cat-env: #ffaa00;
  }

  /* ── Pixel theme structural overrides ── */
  [data-theme="pixel"] *,
  [data-theme="pixel-amber"] * {
    border-radius: 0 !important;
    image-rendering: pixelated;
  }
  /* Pixel-style offset shadow on cards & buttons */
  [data-theme="pixel"] .preset-card,
  [data-theme="pixel-amber"] .preset-card {
    border-width: 2px;
    box-shadow: none;
  }
  [data-theme="pixel"] .preset-card:hover,
  [data-theme="pixel-amber"] .preset-card:hover,
  [data-theme="pixel"] .preset-card.active,
  [data-theme="pixel-amber"] .preset-card.active {
    box-shadow: 3px 3px 0 var(--accent);
    transform: translate(-1px, -1px);
  }
  [data-theme="pixel"] .param,
  [data-theme="pixel-amber"] .param,
  [data-theme="pixel"] .tcard,
  [data-theme="pixel-amber"] .tcard {
    border-width: 2px;
  }
  [data-theme="pixel"] .btn-play,
  [data-theme="pixel-amber"] .btn-play,
  [data-theme="pixel"] .mobile-play-btn,
  [data-theme="pixel-amber"] .mobile-play-btn {
    box-shadow: 4px 4px 0 var(--accent2);
    transition: box-shadow 0.05s, transform 0.05s;
  }
  [data-theme="pixel"] .btn-play:active,
  [data-theme="pixel-amber"] .btn-play:active,
  [data-theme="pixel"] .mobile-play-btn:active,
  [data-theme="pixel-amber"] .mobile-play-btn:active {
    box-shadow: 1px 1px 0 var(--accent2);
    transform: translate(3px, 3px);
  }
  [data-theme="pixel"] .wave-btn.active,
  [data-theme="pixel-amber"] .wave-btn.active {
    box-shadow: 2px 2px 0 var(--accent);
  }
  /* Scanline overlay */
  [data-theme="pixel"] body::after,
  [data-theme="pixel-amber"] body::after {
    content: '';
    pointer-events: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: repeating-linear-gradient(
      to bottom,
      transparent 0px,
      transparent 3px,
      rgba(0, 0, 0, 0.08) 3px,
      rgba(0, 0, 0, 0.08) 4px
    );
  }
  /* Square swatches for pixel themes */
  .theme-swatch.is-pixel { border-radius: 3px !important; }

  /* ── Theme swatches UI ── */
  .theme-swatches {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 2px;
  }
  .theme-swatch {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.12s, border-color 0.12s;
    flex-shrink: 0;
  }
  .theme-swatch:hover { transform: scale(1.18); }
  .theme-swatch.is-active {
    border-color: var(--text);
    transform: scale(1.1);
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    min-height: 100vh;
    display: grid;
    grid-template-rows: auto 1fr;
    overflow: hidden;
  }
  /* Header */
  header {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
  }
  header h1 {
    font-family: var(--mono);
    font-size: 16px;
    color: var(--accent2);
    letter-spacing: 2px;
  }
  .badge {
    font-family: var(--mono);
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 4px;
    background: var(--bg4);
    color: var(--text2);
    border: 1px solid var(--border2);
  }
  .header-status {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text3);
    font-family: var(--mono);
  }
  .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
  @keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }

  /* Layout */
  .layout {
    display: grid;
    grid-template-columns: 260px 8px 1fr 8px 280px;
    height: calc(100vh - 53px);
    overflow: hidden;
  }

  /* Panel resizers (drag horizontally) */
  .panel-resizer {
    background: var(--bg2);
    position: relative;
    cursor: col-resize;
    touch-action: none;
  }
  .panel-resizer::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-0.5px);
    width: 1px;
    background: var(--border);
  }
  .panel-resizer:hover::before {
    background: var(--border2);
  }
  .layout.is-resizing {
    user-select: none;
    cursor: col-resize;
  }

  /* Sidebar left: presets */
  .sidebar {
    background: var(--bg2);
    border-right: none;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }
  .sidebar-header {
    padding: 12px 16px;
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--text3);
    font-family: var(--mono);
    border-bottom: 1px solid var(--border);
    text-transform: uppercase;
  }
  .cat-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
  }
  .cat-tab {
    flex: 1;
    padding: 8px 4px;
    font-size: 10px;
    font-family: var(--mono);
    background: none;
    border: none;
    color: var(--text3);
    cursor: pointer;
    transition: color .15s, border-bottom-color .15s;
    border-bottom: 2px solid transparent;
    text-align: center;
  }
  .cat-tab:hover { color: var(--text); }
  .cat-tab.active-8bit { color: var(--cat-8bit); border-bottom-color: var(--cat-8bit); }
  .cat-tab.active-real { color: var(--cat-real); border-bottom-color: var(--cat-real); }
  .cat-tab.active-ui { color: var(--cat-ui); border-bottom-color: var(--cat-ui); }
  .cat-tab.active-env { color: var(--cat-env); border-bottom-color: var(--cat-env); }
  .cat-tab.active {
    color: var(--accent2);
    border-bottom-color: var(--accent2);
  }
  .preset-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
  }

  /* Library actions (add/copy/delete/rename) */
  .library-actions {
    padding: 8px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    overflow: hidden;
  }
  .library-actions .btn-secondary {
    width: auto;
    padding: 8px 10px;
    font-size: 11px;
    flex: 1 1 auto;
  }

  .library-actions-open-btn:disabled {
    opacity: .55;
    cursor: not-allowed;
  }

  /* game add tab button (right side of the tab row) */
  .cat-tab.library-add-game-tab {
    flex: 0 0 auto;
    width: 76px;
    font-size: 10px;
    font-family: var(--mono);
    color: var(--accent2);
    border-bottom-color: transparent;
    border-left: 1px solid var(--border);
  }
  .cat-tab.library-add-game-tab:hover {
    background: rgba(108,99,255,.12);
    color: var(--accent2);
  }

  /* subtab add tab button (right side of the subtab row) */
  .cat-tab.library-add-subtab-tab {
    flex: 0 0 auto;
    width: 76px;
    font-size: 10px;
    font-family: var(--mono);
    color: var(--accent2);
    border-bottom-color: transparent;
    border-left: 1px solid var(--border);
  }
  .cat-tab.library-add-subtab-tab:hover {
    background: rgba(108,99,255,.12);
    color: var(--accent2);
  }

  /* DnD reorder */
  .cat-tab.is-dnd-over {
    border-bottom-color: var(--accent) !important;
    color: var(--accent2) !important;
    background: rgba(108,99,255,.10) !important;
  }
  .cat-tab.is-dnd-dragging {
    opacity: .6;
  }

  .preset-list::-webkit-scrollbar { width: 4px; }
  .preset-list.tb-drop-target {
    outline: 2px dashed var(--accent);
    outline-offset: -3px;
    background: rgba(108,99,255,.06);
  }
  .preset-list::-webkit-scrollbar-track { background: transparent; }
  .preset-list::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }
  .preset-btn {
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 4px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--sans);
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background-color .15s, border-color .15s;
  }
  .preset-btn:hover { background: var(--bg4); border-color: var(--border2); }
  .preset-btn.active { border-color: var(--accent); background: rgba(108,99,255,.1); }
  .preset-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
  }
  .preset-btn-load {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
  }
  .preset-info { flex: 1; min-width: 0; }
  .preset-name { font-size: 13px; font-weight: 500; }
  .preset-desc { font-size: 11px; color: var(--text3); margin-top: 2px; }
  .preset-item-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
    opacity: 0;
    transition: opacity .15s;
  }
  .preset-btn:hover .preset-item-actions { opacity: 1; }
  .preset-item-btn {
    width: 26px;
    height: 26px;
    border-radius: 5px;
    border: 1px solid var(--border);
    background: var(--bg3);
    color: var(--text2);
    cursor: pointer;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
  }
  .preset-item-btn:hover { background: var(--bg4); border-color: var(--border2); }
  .preset-item-btn.del { color: #e05; border-color: rgba(238,0,85,.3); }
  .preset-item-btn.del:hover { background: rgba(238,0,85,.1); }

  /* User library: reorder mode (handle drag) */
  .preset-list.preset-list--reorder {
    outline: 1px dashed rgba(108,99,255,.35);
    outline-offset: -4px;
    border-radius: 8px;
  }
  .preset-item-dnd-handle {
    flex-shrink: 0;
    width: 26px;
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    color: var(--text3);
    font-size: 14px;
    line-height: 1;
    user-select: none;
    -webkit-user-select: none;
    border-radius: 6px;
  }
  .preset-item-dnd-handle:active {
    cursor: grabbing;
  }
  .preset-btn.is-dnd-over {
    border-color: var(--accent) !important;
    background: rgba(108,99,255,.1) !important;
  }
  .preset-btn.is-dnd-dragging {
    opacity: .65;
  }
  .preset-item-dnd-handle.is-dnd-dragging {
    opacity: .65;
  }

  /* Center: editor + visualizer (+ arp / pseq below). Single scroll so nothing is clipped off-screen. */
  .center {
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
  }
  .center::-webkit-scrollbar { width: 6px; }
  .center::-webkit-scrollbar-track { background: transparent; }
  .center::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
  .visualizer-wrap {
    padding: 16px 20px 0;
    flex-shrink: 0;
  }
  .visualizer-label {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
    letter-spacing: 1px;
    margin-bottom: 8px;
    text-transform: uppercase;
  }
  canvas {
    width: 100%;
    height: 100px;
    border-radius: 8px;
    background: var(--bg2);
    border: 1px solid var(--border);
    display: block;
  }
  .editor-area {
    flex: 0 1 auto;
    overflow: visible;
    padding: 16px 20px;
  }
  .section-title {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
    margin-top: 16px;
  }
  .section-title:first-child { margin-top: 0; }

  /* Layer strip (multi-SE mix) */
  .layer-strip-wrap {
    margin-bottom: 4px;
  }
  .layer-strip-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
  }
  .layer-strip-toolbar .section-title {
    margin: 0;
    flex: 1;
  }
  .layer-add-btn {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: 1px solid var(--border2);
    background: var(--bg3);
    color: var(--accent);
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
  }
  .layer-add-btn:hover {
    background: var(--bg4);
    border-color: var(--accent);
  }
  .layer-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: stretch;
  }
  .layer-card {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 8px;
    padding: 8px 10px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 11px;
    max-width: 100%;
  }
  .layer-card.is-active {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px rgba(108, 99, 255, 0.25);
  }
  .layer-card.is-muted {
    opacity: 0.55;
  }
  .layer-card-tab {
    background: transparent;
    border: none;
    color: var(--text);
    font-family: var(--mono);
    font-size: 10px;
    cursor: pointer;
    padding: 2px 4px;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .layer-card-tab:hover {
    color: var(--accent2);
  }
  .layer-mini {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 9px;
    color: var(--text3);
  }
  .layer-mini input[type="range"] {
    width: 64px;
    accent-color: var(--accent);
  }
  .layer-delay-input {
    width: 48px;
    padding: 2px 4px;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg2);
    color: var(--text);
    font-family: var(--mono);
    font-size: 10px;
  }
  .layer-mute-btn,
  .layer-del-btn {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg2);
    color: var(--text2);
    font-size: 12px;
    cursor: pointer;
    line-height: 1;
  }
  .layer-mute-btn:hover,
  .layer-del-btn:hover {
    border-color: var(--text3);
    color: var(--text);
  }
  .layer-del-btn {
    color: var(--coral);
  }

  .params-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 16px;
  }
  .param {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px;
  }
  .param-label {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .param-val {
    color: var(--accent2);
    font-size: 11px;
  }
  /* Range: hostはサムより十分な高さ＋透明。トラックは疑似要素で指定（WebKitのつまみ位置ずれ防止） */
  input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    min-width: 0;
    height: 18px;
    background: transparent;
    border-radius: 0;
    outline: none;
  }
  input[type=range]::-webkit-slider-runnable-track {
    height: 4px;
    background: var(--bg4);
    border-radius: 2px;
  }
  input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    margin-top: -5px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    transition: transform .1s;
  }
  input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); }
  input[type=range]::-moz-range-track {
    height: 4px;
    background: var(--bg4);
    border-radius: 2px;
  }
  input[type=range]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border: none;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
  }
  input[type=range]::-moz-focus-outer { border: 0; }

  .wave-selector {
    display: flex;
    gap: 6px;
    margin-bottom: 16px;
  }
  .wave-btn {
    flex: 1;
    padding: 8px;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text2);
    font-family: var(--mono);
    font-size: 11px;
    cursor: pointer;
    transition: background-color .15s, border-color .15s, color .15s;
    text-align: center;
  }
  .wave-btn:hover { border-color: var(--border2); color: var(--text); }
  .wave-btn.active { background: rgba(108,99,255,.15); border-color: var(--accent); color: var(--accent2); }

  /* Sidebar right: actions */
  .panel {
    background: var(--bg2);
    border-left: none;
    display: flex;
    flex-direction: column;
    padding: 16px;
    gap: 16px;
    overflow-y: auto;
  }
  .panel::-webkit-scrollbar { width: 4px; }
  .panel::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }
  .panel-section-title {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  .btn-play {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-family: var(--mono);
    font-size: 14px;
    cursor: pointer;
    letter-spacing: 2px;
    transition: background-color .15s, transform .15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }
  .btn-play:hover { background: var(--accent2); transform: translateY(-1px); }
  .btn-play:active { transform: translateY(0); }
  .btn-secondary {
    width: 100%;
    padding: 10px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--mono);
    font-size: 12px;
    cursor: pointer;
    transition: background-color .15s, border-color .15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }

  /* Library modal */
  .library-select-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
  }
  .library-label {
    width: 54px;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
    letter-spacing: 1px;
  }
  #libraryGameSelect,
  #librarySubTabSelect {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--mono);
    font-size: 12px;
    outline: none;
  }

  .library-json-row {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
  }
  .library-actions-block {
    padding: 0 0 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
  }
  .library-actions-block-row {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 4px;
    border-top: 1px solid var(--border);
    margin-top: 2px;
  }
  .btn-secondary:hover { border-color: var(--border2); background: var(--bg4); }
  .btn-export {
    width: 100%;
    padding: 12px;
    background: rgba(57,217,138,.1);
    border: 1px solid rgba(57,217,138,.3);
    border-radius: 10px;
    color: var(--green);
    font-family: var(--mono);
    font-size: 12px;
    cursor: pointer;
    transition: background-color .15s;
    letter-spacing: 1px;
  }
  .btn-export:hover { background: rgba(57,217,138,.2); }
  .volume-wrap { display: flex; align-items: center; gap: 10px; }
  .volume-wrap input[type=range] { flex: 1; min-width: 0; }
  .vol-label { font-family: var(--mono); font-size: 10px; color: var(--text3); white-space: nowrap; }
  .info-box {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    font-size: 12px;
    color: var(--text2);
    line-height: 1.6;
  }
  .info-box strong { color: var(--accent2); font-family: var(--mono); font-size: 11px; }
  .kbd {
    font-family: var(--mono);
    font-size: 10px;
    background: var(--bg4);
    border: 1px solid var(--border2);
    border-radius: 3px;
    padding: 1px 5px;
    color: var(--text2);
  }
  .random-btn {
    width: 100%;
    padding: 10px;
    background: rgba(255,107,107,.08);
    border: 1px solid rgba(255,107,107,.25);
    border-radius: 8px;
    color: var(--coral);
    font-family: var(--mono);
    font-size: 11px;
    cursor: pointer;
    transition: background-color .15s;
    letter-spacing: 1px;
  }
  .random-btn:hover { background: rgba(255,107,107,.15); }

  select {
    width: 100%;
    padding: 8px 10px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--mono);
    font-size: 12px;
    outline: none;
    cursor: pointer;
    margin-top: 4px;
  }
  select:focus { border-color: var(--accent); }

  .toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
  }
  .toggle-label { font-size: 12px; color: var(--text2); }
  .toggle {
    position: relative;
    width: 36px;
    height: 20px;
  }
  .toggle input { opacity: 0; width: 0; height: 0; }
  .toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--bg4);
    border-radius: 20px;
    cursor: pointer;
    transition: .2s;
    border: 1px solid var(--border2);
  }
  .toggle-slider:before {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    left: 2px;
    top: 2px;
    background: var(--text3);
    border-radius: 50%;
    transition: .2s;
  }
  .toggle input:checked + .toggle-slider { background: rgba(108,99,255,.3); border-color: var(--accent); }
  .toggle input:checked + .toggle-slider:before { transform: translateX(16px); background: var(--accent); }

  .pitch-seq {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
    margin-top: 8px;
  }
  .pitch-step {
    aspect-ratio: 1;
    border-radius: 4px;
    background: var(--bg3);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: background-color .15s, border-color .15s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mono);
    font-size: 9px;
    color: var(--text3);
  }
  .pitch-step.active { background: rgba(108,99,255,.25); border-color: var(--accent); color: var(--accent2); }
  .pitch-step:hover { border-color: var(--border2); }

  /* JSON Preset Manager */
  .modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.7);
    z-index: 100;
    align-items: center;
    justify-content: center;
  }
  .modal-overlay.open { display: flex; }
  .modal {
    background: var(--bg2);
    border: 1px solid var(--border2);
    border-radius: 14px;
    width: 520px;
    max-width: 95vw;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }
  .modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .modal-title {
    font-family: var(--mono);
    font-size: 13px;
    color: var(--accent2);
    letter-spacing: 1px;
    flex: 1;
  }
  .modal-close {
    background: none;
    border: none;
    color: var(--text3);
    font-size: 18px;
    cursor: pointer;
    line-height: 1;
    padding: 2px 6px;
    border-radius: 4px;
    transition: color .15s;
  }
  .modal-close:hover { color: var(--text); }
  .modal-body { flex: 1; overflow-y: auto; padding: 16px 20px; }
  .modal-body::-webkit-scrollbar { width: 4px; }
  .modal-body::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }
  .modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
  }

  /* Help Modal */
  .help-modal {
    width: 920px;
    max-width: 95vw;
    max-height: 88vh;
  }
  .help-body {
    color: var(--text2);
    line-height: 1.7;
    font-size: 12.5px;
  }
  .help-h3 {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text3);
    margin: 14px 0 8px;
  }
  .help-body ul {
    margin: 0 0 10px 18px;
  }
  .help-body li {
    margin-bottom: 6px;
  }
  .help-footer {
    justify-content: flex-end;
  }
  .saved-preset-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg3);
    margin-bottom: 6px;
    transition: border-color .15s;
  }
  .saved-preset-row:hover { border-color: var(--border2); }
  .saved-preset-name { flex: 1; font-size: 13px; font-weight: 500; }
  .saved-preset-meta { font-size: 11px; color: var(--text3); font-family: var(--mono); }
  .btn-sm {
    padding: 5px 10px;
    border-radius: 6px;
    font-family: var(--mono);
    font-size: 10px;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--bg4);
    color: var(--text2);
    transition: background-color .15s, border-color .15s, color .15s;
    white-space: nowrap;
  }
  .btn-sm:hover { border-color: var(--border2); color: var(--text); }
  .btn-sm.load { border-color: rgba(108,99,255,.4); color: var(--accent2); background: rgba(108,99,255,.1); }
  .btn-sm.load:hover { background: rgba(108,99,255,.2); }
  .btn-sm.del { border-color: rgba(255,107,107,.3); color: var(--coral); background: rgba(255,107,107,.06); }
  .btn-sm.del:hover { background: rgba(255,107,107,.15); }
  .save-form { display: flex; gap: 8px; margin-bottom: 16px; }
  .save-form input[type=text] {
    flex: 1;
    padding: 9px 12px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--sans);
    font-size: 13px;
    outline: none;
    transition: border-color .15s;
  }
  .save-form input[type=text]:focus { border-color: var(--accent); }
  .save-form input[type=text]::placeholder { color: var(--text3); }
  .empty-msg { color: var(--text3); font-size: 12px; text-align: center; padding: 24px 0; font-family: var(--mono); }
  .section-divider {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  .toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg4);
    border: 1px solid var(--border2);
    border-radius: 8px;
    padding: 8px 16px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text);
    opacity: 0;
    transition: opacity .25s, transform .25s;
    z-index: 200;
    pointer-events: none;
    white-space: nowrap;
  }
  .toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

  /* ── AI SE Generator ───────────────────────────────────────────────────── */

  /* Header badge */
  .ai-gen-badge {
    background: rgba(57,217,138,.12);
    border-color: rgba(57,217,138,.4);
    color: var(--green);
    font-weight: 700;
  }
  .ai-gen-badge:hover { background: rgba(57,217,138,.22); }

  /* Modal size */
  .ai-gen-modal { width: 560px; max-height: 88vh; }

  /* API settings collapsible */
  .ai-settings-block {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
  }
  .ai-settings-summary {
    padding: 9px 14px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text3);
    cursor: pointer;
    letter-spacing: 1px;
    user-select: none;
    list-style: none;
  }
  .ai-settings-summary::-webkit-details-marker { display: none; }
  .ai-settings-summary:hover { color: var(--text2); }
  .ai-settings-grid {
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: 8px 10px;
    align-items: center;
    padding: 10px 14px 12px;
    border-top: 1px solid var(--border);
  }
  .ai-settings-label {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: 1px;
  }
  .ai-select, .ai-input {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-family: var(--sans);
    font-size: 12px;
    padding: 6px 10px;
    outline: none;
    transition: border-color .15s;
    width: 100%;
  }
  .ai-select:focus, .ai-input:focus { border-color: var(--accent); }
  .ai-input::placeholder { color: var(--text3); }
  .ai-settings-note {
    padding: 8px 14px 10px;
    font-size: 10px;
    color: var(--text3);
    border-top: 1px solid var(--border);
  }

  /* Prompt area */
  .ai-textarea {
    width: 100%;
    background: var(--bg3);
    border: 1px solid var(--accent);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--sans);
    font-size: 13px;
    padding: 10px 12px;
    resize: vertical;
    outline: none;
    transition: border-color .15s;
    line-height: 1.5;
  }
  .ai-textarea:focus { border-color: var(--accent2); }
  .ai-prompt-label {
    font-size: 10px;
    color: var(--text3);
    margin-top: 5px;
    font-family: var(--mono);
  }

  /* Examples */
  .ai-examples-label {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text3);
    letter-spacing: 1px;
    margin-top: 14px;
    margin-bottom: 7px;
  }
  .ai-examples { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
  .ai-example-chip {
    padding: 5px 11px;
    border-radius: 20px;
    border: 1px solid var(--border2);
    background: var(--bg3);
    color: var(--text2);
    font-size: 12px;
    cursor: pointer;
    transition: border-color .15s, color .15s, background-color .15s;
    white-space: nowrap;
  }
  .ai-example-chip:hover {
    border-color: var(--accent);
    color: var(--text);
    background: var(--bg4);
  }

  /* Generate button */
  .ai-gen-btn {
    width: 100%;
    padding: 13px;
    background: rgba(57,217,138,.14);
    border: 1px solid rgba(57,217,138,.5);
    border-radius: 10px;
    color: var(--green);
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 2px;
    cursor: pointer;
    transition: background-color .15s, border-color .15s;
  }
  .ai-gen-btn:hover:not(:disabled) { background: rgba(57,217,138,.24); border-color: var(--green); }
  .ai-gen-btn:disabled { opacity: .45; cursor: default; }

  /* Status */
  .ai-status {
    text-align: center;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--green);
    margin-top: 8px;
    min-height: 16px;
  }
  .ai-status.ai-status-error { color: var(--coral); }

  /* Result card */
  .ai-result {
    margin-top: 12px;
    background: var(--bg3);
    border: 1px solid var(--border2);
    border-radius: 10px;
    padding: 14px 16px 12px;
  }
  .ai-result-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--accent2);
    margin-bottom: 4px;
  }
  .ai-result-desc { font-size: 12px; color: var(--text2); margin-bottom: 10px; }
  .ai-result-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 12px; }
  .ai-layer-options {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 16px;
    font-size: 12px;
    color: var(--text2);
  }
  .ai-checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    user-select: none;
  }
  .ai-checkbox-label input { accent-color: var(--accent); }
  .ai-max-layers-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .ai-max-layers-select {
    width: auto;
    min-width: 52px;
    padding: 4px 8px;
    font-size: 12px;
  }
  .ai-result-layers {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
    max-height: 160px;
    overflow-y: auto;
    padding: 4px 0;
  }
  .ai-layer-preview {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 6px 8px;
    background: var(--bg2);
    border-radius: 6px;
    border: 1px solid var(--border);
    font-size: 11px;
  }
  .ai-layer-preview-name { font-family: var(--mono); color: var(--text); }
  .ai-layer-preview-meta { color: var(--text3); font-size: 10px; }
  .ai-tag {
    padding: 3px 8px;
    border-radius: 4px;
    background: var(--bg4);
    border: 1px solid var(--border);
    font-family: var(--mono);
    font-size: 10px;
    color: var(--teal);
  }
  .ai-result-actions { display: flex; gap: 8px; }
  .ai-preview-btn {
    padding: 9px 16px;
    border-radius: 8px;
    border: 1px solid var(--border2);
    background: var(--bg4);
    color: var(--text);
    font-family: var(--mono);
    font-size: 11px;
    cursor: pointer;
    transition: border-color .15s, color .15s;
    white-space: nowrap;
  }
  .ai-preview-btn:hover { border-color: var(--accent); color: var(--accent2); }
  .ai-apply-btn {
    flex: 1;
    padding: 9px 16px;
    border-radius: 8px;
    border: 1px solid rgba(57,217,138,.45);
    background: rgba(57,217,138,.1);
    color: var(--green);
    font-family: var(--mono);
    font-size: 11px;
    cursor: pointer;
    transition: background-color .15s, border-color .15s;
  }
  .ai-apply-btn:hover { background: rgba(57,217,138,.2); border-color: var(--green); }

  /* Model row (select + refresh button) */
  .ai-model-row {
    display: flex;
    gap: 6px;
    align-items: center;
  }
  .ai-refresh-btn {
    padding: 6px 9px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg3);
    color: var(--text2);
    font-size: 14px;
    cursor: pointer;
    transition: border-color .15s, color .15s;
    flex-shrink: 0;
    line-height: 1;
  }
  .ai-refresh-btn:hover { border-color: var(--accent); color: var(--accent2); }
  .ai-model-status {
    font-size: 10px;
    color: var(--text3);
    font-family: var(--mono);
  }
  .ai-model-custom-input { margin-top: 5px; }