.canvas-app {
  position: relative;
  height: calc(100vh - var(--nav-height, 44px) - 24px);
  min-height: 560px;
  margin: -20px calc(50% - 50vw) 0;
  overflow: hidden;
  background: #f2f3f5;
  color: var(--text);
}
.canvas-app[data-version-busy="1"] { pointer-events: none; }

body:has(.canvas-editor-app) .footer { display: none; }
body:has(.canvas-app) .hb-fab,
body:has(.canvas-app) .hb-popup,
body:has(.canvas-app) .hb-backdrop { display: none; }

.canvas-toolbar {
  position: absolute;
  z-index: 20;
  top: 62px;
  left: 50%;
  display: flex;
  align-items: center;
  width: min(1280px, calc(100vw - 28px));
  min-height: 48px;
  padding: 6px;
  border: 1px solid rgba(0, 0, 0, .1);
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .1);
  transform: translateX(-50%);
}
.canvas-toolbar-scroll { display: flex; align-items: center; min-width: 0; flex: 1; overflow-x: auto; scrollbar-width: none; }
.canvas-toolbar-scroll::-webkit-scrollbar { display: none; }

.canvas-area-tabs { position: absolute; z-index: 22; top: 9px; left: 50%; display: flex; gap: 2px; padding: 3px; border: 1px solid rgba(0,0,0,.1); border-radius: 7px; background: rgba(255,255,255,.96); box-shadow: 0 3px 12px rgba(0,0,0,.07); transform: translateX(-50%); }
.canvas-area-tabs a { position: relative; min-width: 92px; padding: 8px 14px; border-radius: 5px; color: #686970; font-size: 12px; font-weight: 600; text-align: center; text-decoration: none; white-space: nowrap; }
.canvas-area-tabs a:hover { background: #f1f2f4; color: #25262b; }
.canvas-area-tabs a.is-active { background: #e8f2ff; color: #075fc7; }
.canvas-area-tabs form { display: flex; margin: 0; }
.canvas-area-tabs button { width: 34px; border: 0; border-radius: 5px; background: transparent; color: #686970; cursor: pointer; font-size: 18px; }
.canvas-area-tabs button:hover { background: #f1f2f4; color: #075fc7; }
.canvas-browser { position: absolute; z-index: 21; top: 116px; left: 14px; display: flex; flex-direction: column; width: 190px; max-height: calc(100% - 140px); padding: 12px; overflow-y: auto; border: 1px solid #dedfe3; background: rgba(255,255,255,.96); }
.canvas-browser strong { margin: 4px 8px 8px; font-size: 12px; }
.canvas-browser a { padding: 8px; color: #55565b; font-size: 12px; text-decoration: none; }
.canvas-browser a:hover, .canvas-browser a.is-active { background: #e8f2ff; color: #075fc7; }
.canvas-privacy { display: flex; align-items: center; gap: 4px; margin-right: 4px; color: #66676d; font-size: 12px; }
.canvas-privacy select { height: 32px; border: 1px solid #d6d7db; background: transparent; color: inherit; font: inherit; font-size: 12px; }
.canvas-theme-lock { display: flex; align-items: center; gap: 4px; margin-right: 4px; color: #66676d; font-size: 12px; white-space: nowrap; }
.canvas-theme-lock input { accent-color: #2563eb; }
.canvas-app[data-readonly="1"] .canvas-mode-switch, .canvas-app[data-readonly="1"] .canvas-toolbar-divider, .canvas-app[data-readonly="1"] .canvas-insert-tools, .canvas-app[data-readonly="1"] .canvas-draw-tools, .canvas-app[data-readonly="1"] .canvas-danger-btn { display: none; }
.canvas-toolbar-group { display: flex; align-items: center; gap: 4px; }
.canvas-toolbar-spacer { flex: 1; }
.canvas-toolbar-divider { width: 1px; height: 24px; margin: 0 5px; background: #dedfe3; }

.canvas-tool,
.canvas-icon-btn,
.canvas-zoom button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  border: 0;
  background: transparent;
  color: #515156;
  cursor: pointer;
  font: inherit;
}

.canvas-tool { gap: 6px; min-width: 74px; padding: 0 10px; font-size: 13px; }
.canvas-tool span { font-size: 18px; }
.canvas-tool img { width: 19px; height: 19px; }
.canvas-tool.is-active { background: #e8f2ff; color: #075fc7; }
.canvas-icon-btn { width: 36px; font-size: 20px; }
.canvas-icon-btn:hover, .canvas-zoom button:hover { background: #f0f1f3; color: #111; }
.canvas-danger-btn:hover { background: #fff0f0; color: #c82d35; }
.canvas-markdown-toggle { display: grid; place-items: center; width: 34px; height: 34px; color: #62636a; cursor: pointer; font-size: 10px; font-weight: 700; }
.canvas-markdown-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.canvas-markdown-toggle:has(input:checked) { background: #e8f2ff; color: #075fc7; }
.canvas-markdown-help { display: grid; place-items: center; width: 24px; height: 24px; padding: 0; border: 1px solid #d7d8dc; border-radius: 50%; background: transparent; color: #6b6c72; cursor: pointer; font-size: 11px; }
.canvas-toolbar-actions { display: flex; align-items: center; min-width: 0; flex-shrink: 0; gap: 3px; margin-left: 4px; }
.canvas-toolbar-action { display: inline-flex; align-items: center; min-height: 34px; gap: 4px; padding: 0 8px; border: 0; background: transparent; color: #5b5c62; cursor: pointer; font: inherit; font-size: 12px; white-space: nowrap; text-decoration: none; }
.canvas-toolbar-action:hover { background: #f0f1f3; color: #111; }
.canvas-toolbar-action.is-active { background: #fff0f0; color: #c82d35; }
.canvas-more { position: relative; flex-shrink: 0; }
.canvas-more > summary { display: grid; place-items: center; width: 36px; height: 34px; box-sizing: border-box; overflow: hidden; list-style: none; color: #515156; cursor: pointer; font-size: 17px; line-height: 1; white-space: nowrap; }
.canvas-more > summary::-webkit-details-marker { display: none; }
.canvas-more > summary:hover, .canvas-more[open] > summary { background: #f0f1f3; color: #111; }
.canvas-more-panel { position: absolute; z-index: 30; top: 40px; right: 0; display: flex; width: 190px; max-width: calc(100vw - 16px); box-sizing: border-box; flex-direction: column; gap: 2px; padding: 6px; border: 1px solid #d9dade; background: rgba(255,255,255,.98); box-shadow: 0 8px 24px rgba(0,0,0,.14); }
.canvas-more-action { display: flex; align-items: center; width: 100%; min-height: 34px; gap: 7px; padding: 6px 8px; border: 0; background: transparent; color: #45464c; cursor: pointer; font: inherit; font-size: 12px; text-align: left; text-decoration: none; box-sizing: border-box; }
.canvas-more-action:hover { background: #f0f1f3; color: #111; }
.canvas-more-panel .canvas-privacy { align-items: flex-start; flex-direction: column; gap: 5px; margin: 0; padding: 6px 8px; }
.canvas-more-panel .canvas-privacy select { width: 100%; }

.canvas-draw-tools { max-width: 0; overflow: hidden; opacity: 0; transition: max-width .2s ease, opacity .15s ease; }
.canvas-app[data-mode="draw"] .canvas-draw-tools { max-width: 520px; opacity: 1; }
.canvas-connect-tools { display: none; }
.canvas-app[data-mode="connect"] .canvas-connect-tools { display: flex; }
.canvas-pen-picker, .canvas-spectrum { display: flex; align-items: center; gap: 3px; color: #6e6e73; font-size: 11px; }
.canvas-pen-option { display: grid; place-items: center; width: 31px; height: 31px; padding: 0; border: 0; background: transparent; color: #52535a; cursor: pointer; }
.canvas-pen-option img { width: 20px; height: 20px; pointer-events: none; }
.canvas-pen-option:hover { background: #f0f1f3; }
.canvas-pen-option.is-active { background: #e8f2ff; color: #075fc7; }
.canvas-spectrum input { width: 30px; height: 30px; padding: 2px; border: 1px solid #d6d7db; background: #fff; cursor: pointer; }
.canvas-size { display: flex; align-items: center; gap: 7px; margin-left: 7px; color: #6e6e73; font-size: 11px; }
.canvas-size input { width: 72px; accent-color: #2563eb; }
.canvas-save-state { margin: 0 8px; color: #7a7a80; font-size: 11px; white-space: nowrap; }

.canvas-viewport { position: absolute; inset: 0; overflow: hidden; outline: none; touch-action: none; cursor: grab; }
.canvas-viewport.is-panning { cursor: grabbing; }
.canvas-app[data-mode="draw"] .canvas-viewport { cursor: crosshair; }
.canvas-stage { position: absolute; top: 0; left: 0; width: 12000px; height: 8000px; transform-origin: 0 0; }
.canvas-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: #f7f7f8;
  background-image: radial-gradient(circle, #c9cbd0 1px, transparent 1px);
  background-size: 24px 24px;
}
.canvas-drawing, .canvas-items { position: absolute; inset: 0; width: 100%; height: 100%; }
.canvas-drawing { overflow: visible; pointer-events: none; }
.canvas-items { pointer-events: none; }
.canvas-stroke { fill: none; stroke-linecap: round; stroke-linejoin: round; pointer-events: stroke; }
.canvas-stroke.is-selected { filter: drop-shadow(0 0 2px #2563eb); }
.canvas-stroke[data-pen="pencil"] { stroke-dasharray: .8 1.15; filter: url(#canvasPencilTexture); opacity: .82; }
.canvas-stroke[data-pen="marker"] { opacity: .34; stroke-linecap: square; }
.canvas-lasso { fill: rgba(37,99,235,.08); stroke: #2563eb; stroke-width: 2; stroke-dasharray: 7 5; vector-effect: non-scaling-stroke; }
.canvas-connection { pointer-events: stroke; cursor: pointer; }
.canvas-connection-line { fill: none; stroke-width: 2; stroke-linecap: round; }
.canvas-connection.is-selected .canvas-connection-line { stroke: #2563eb; stroke-width: 3; }
.canvas-connection-note { fill: #41434a; stroke: #fff; stroke-width: 5px; paint-order: stroke; font-size: 13px; text-anchor: middle; pointer-events: auto; cursor: text; }
.canvas-app[data-mode="connect"] .canvas-viewport { cursor: crosshair; }
.canvas-app[data-mode="connect"] .canvas-item-text, .canvas-app[data-mode="connect"] .canvas-item-file, .canvas-app[data-mode="connect"] .canvas-item-image { cursor: crosshair; }
.canvas-item.is-link-source { outline: 3px solid #16a34a; outline-offset: 3px; }

.canvas-item {
  position: absolute;
  min-width: 120px;
  border: 1px solid #d9dade;
  background: #fff;
  box-shadow: 0 3px 12px rgba(0, 0, 0, .08);
  pointer-events: auto;
  user-select: none;
}
.canvas-item.is-selected { outline: 2px solid #2563eb; outline-offset: 2px; }
.canvas-item-delete { position: absolute; z-index: 3; top: -10px; right: -10px; display: none; place-items: center; width: 24px; height: 24px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: #d92d3a; color: #fff; cursor: pointer; font-size: 17px; line-height: 1; }
.canvas-app[data-delete-mode="1"] .canvas-item-delete { display: grid; }
.canvas-app[data-delete-mode="1"] .canvas-item { animation: canvasItemShake .42s ease; }
.canvas-item-delete:hover { background: #b91f2c; }
@keyframes canvasItemShake {
  0%, 100% { transform: translateX(0) rotate(0); }
  20% { transform: translateX(-3px) rotate(-.7deg); }
  40% { transform: translateX(3px) rotate(.7deg); }
  60% { transform: translateX(-2px) rotate(-.4deg); }
  80% { transform: translateX(2px) rotate(.4deg); }
}
.canvas-item-image { width: 280px; }
.canvas-item-image img { display: block; width: 100%; max-height: 360px; object-fit: contain; background: #eceef1; pointer-events: none; }
.canvas-item-resize { position: absolute; right: -8px; bottom: -8px; width: 16px; height: 16px; border: 2px solid #fff; background: #2563eb; box-shadow: 0 1px 4px rgba(0,0,0,.2); cursor: nwse-resize; }
.canvas-item-text { width: 260px; min-height: 86px; padding: 16px; box-shadow: none; }
.canvas-text-editor, .canvas-text-preview { min-height: 52px; outline: none; color: #202124; font-size: 17px; line-height: 1.5; user-select: text; white-space: pre-wrap; word-break: break-word; }
.canvas-app[data-mode="draw"] .canvas-text-editor { user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.canvas-text-editor:empty::before { content: "输入文字"; color: #a2a3a8; }
.canvas-text-preview h1, .canvas-text-preview h2, .canvas-text-preview h3 { margin: 0 0 7px; font-size: 18px; line-height: 1.35; }
.canvas-text-preview ul, .canvas-text-preview ol { margin: 3px 0; padding-left: 22px; }
.canvas-text-preview pre { margin: 4px 0; padding: 8px; overflow: auto; background: #f1f2f4; font-size: 12px; white-space: pre-wrap; }
.canvas-text-preview code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; }
.canvas-text-preview .katex-display { max-width: 100%; overflow-x: auto; overflow-y: hidden; }
.canvas-item-file { display: flex; align-items: center; gap: 12px; width: 280px; padding: 14px; text-decoration: none; color: #202124; }
.canvas-file-icon { display: grid; place-items: center; width: 38px; height: 44px; background: #e8f2ff; color: #1266b5; font-size: 11px; font-weight: 700; }
.canvas-file-copy { min-width: 0; }
.canvas-file-name { display: block; overflow: hidden; font-size: 13px; font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.canvas-file-size { display: block; margin-top: 3px; color: #828389; font-size: 11px; }
.canvas-file-actions { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.canvas-file-preview { height: 30px; padding: 0 8px; border: 0; background: #f0f1f3; color: #34353a; cursor: pointer; font-size: 11px; }
.canvas-file-download { display: grid; place-items: center; width: 32px; height: 32px; margin-left: auto; flex-shrink: 0; background: #f0f1f3; color: #34353a; font-size: 18px; text-decoration: none; }
.canvas-file-download:hover { background: #e2e9f2; color: #075fc7; }
.canvas-preview-modal { position: fixed; z-index: 10000; inset: 0; display: grid; place-items: center; padding: 20px; background: rgba(0,0,0,.62); }
.canvas-preview-modal[hidden] { display: none; }
.canvas-preview-panel { display: flex; width: min(900px, 100%); height: min(720px, 90dvh); flex-direction: column; border: 1px solid var(--divider); background: var(--card-bg); color: var(--text); }
.canvas-preview-panel > header { display: flex; align-items: center; justify-content: space-between; min-height: 44px; padding: 0 12px; border-bottom: 1px solid var(--divider); }
.canvas-preview-panel > header strong { overflow: hidden; font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.canvas-preview-panel > header button { width: 32px; height: 32px; border: 0; background: transparent; color: inherit; cursor: pointer; font-size: 22px; }
.canvas-preview-panel > pre { flex: 1; margin: 0; padding: 16px; overflow: auto; font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; word-break: break-word; }
.canvas-preview-panel > iframe { flex: 1; width: 100%; border: 0; background: #fff; }
.canvas-markdown-guide { height: auto; max-height: min(620px, 88dvh); }
.canvas-access-panel { width: min(520px, 100%); height: auto; max-height: min(620px, 88dvh); }
.canvas-access-panel form { min-height: 0; }
.canvas-access-scope { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; margin: 12px; padding: 3px; border: 1px solid var(--divider); }
.canvas-access-scope legend { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.canvas-access-scope label { cursor: pointer; }
.canvas-access-scope input { position: absolute; opacity: 0; pointer-events: none; }
.canvas-access-scope span { display: grid; min-height: 34px; place-items: center; padding: 4px 8px; color: var(--text-muted); font-size: 12px; text-align: center; }
.canvas-access-scope input:checked + span { background: var(--primary-light); color: var(--primary); font-weight: 600; }
#canvasExcludedUsers[hidden] { display: none; }
.canvas-access-users { max-height: 420px; padding: 12px; overflow: auto; }
.canvas-access-users table { width: 100%; border-collapse: collapse; font-size: 13px; }
.canvas-access-users th, .canvas-access-users td { padding: 9px 8px; border-bottom: 1px solid var(--divider); text-align: left; }
.canvas-access-users th:last-child, .canvas-access-users td:last-child { width: 76px; text-align: center; }
.canvas-access-users tbody tr:hover { background: rgba(37, 99, 235, .06); }
.canvas-access-users input[type="checkbox"] { width: 16px; height: 16px; accent-color: #2563eb; cursor: pointer; }
.canvas-access-check { display: inline-flex; align-items: center; gap: 5px; cursor: pointer; white-space: nowrap; }
.canvas-access-panel footer { display: flex; justify-content: flex-end; padding: 10px 12px; border-top: 1px solid var(--divider); }
.canvas-reset-link { text-decoration: none; }

.canvas-empty { position: absolute; top: 50%; left: 50%; display: flex; flex-direction: column; gap: 7px; color: #696a70; text-align: center; pointer-events: none; transform: translate(-50%, -50%); }
.canvas-empty strong { color: #3d3e42; font-size: 16px; }
.canvas-empty span { font-size: 12px; }
.canvas-empty.is-hidden { display: none; }

.canvas-zoom { position: absolute; z-index: 20; right: 16px; bottom: 16px; display: flex; align-items: center; height: 38px; border: 1px solid rgba(0, 0, 0, .1); background: rgba(255, 255, 255, .96); box-shadow: 0 4px 14px rgba(0, 0, 0, .08); }
.canvas-zoom button { width: 36px; height: 36px; font-size: 18px; }
.canvas-zoom output { width: 52px; color: #55565b; font-size: 11px; text-align: center; }

.canvas-theme-dark { background: #18191b; }
.canvas-theme-dark .canvas-stage::before { background-color: #202124; background-image: radial-gradient(circle, #45474c 1px, transparent 1px); }
.canvas-theme-dark .canvas-toolbar, .canvas-theme-dark .canvas-zoom, .canvas-theme-dark .canvas-view-info, .canvas-theme-dark .canvas-view-actions { border-color: #3b3d42; background: rgba(35, 36, 39, .97); }
.canvas-theme-dark .canvas-tool, .canvas-theme-dark .canvas-icon-btn, .canvas-theme-dark .canvas-zoom button, .canvas-theme-dark .canvas-zoom output { color: #d8d9dd; }
.canvas-theme-dark .canvas-tool img, .canvas-theme-dark .canvas-pen-option img { filter: invert(1) brightness(1.25); }
.canvas-theme-dark .canvas-tool.is-active { background: #173a60; color: #9dccff; }
.canvas-theme-dark .canvas-toolbar-divider { background: #46484d; }
.canvas-theme-dark .canvas-spectrum input { border-color: #4b4d52; background: #2a2b2f; color: #e5e5e7; }
.canvas-theme-dark .canvas-privacy select { border-color: #4b4d52; background: #2a2b2f; color: #e5e5e7; }
.canvas-theme-dark .canvas-pen-option { color: #d8d9dd; }
.canvas-theme-dark .canvas-pen-option.is-active { background: #173a60; }
.canvas-theme-dark .canvas-connection-note { fill: #e5e5e7; stroke: #202124; }
.canvas-theme-dark .canvas-area-tabs { border-color: #3b3d42; background: rgba(35,36,39,.97); }
.canvas-theme-dark .canvas-area-tabs a { color: #b7b8bd; }
.canvas-theme-dark .canvas-area-tabs a:hover { background: #303136; color: #fff; }
.canvas-theme-dark .canvas-area-tabs a.is-active { background: #173a60; color: #9dccff; }
.canvas-theme-dark .canvas-item { border-color: #494b51; background: #2a2b2f; box-shadow: 0 3px 12px rgba(0,0,0,.28); }
.canvas-theme-dark .canvas-text-editor, .canvas-theme-dark .canvas-text-preview, .canvas-theme-dark .canvas-item-file { color: #f1f1f3; }
.canvas-theme-dark .canvas-text-editor:empty::before { color: #85878e; }
.canvas-theme-dark .canvas-text-preview pre { background: #202124; }
.canvas-theme-dark .canvas-item-image img { background: #242529; }
.canvas-theme-dark .canvas-file-icon { background: #173a60; color: #a9d4ff; }
.canvas-theme-dark .canvas-file-size { color: #a5a7ad; }
.canvas-theme-dark .canvas-file-download { background: #3a3b40; color: #f1f1f3; }
.canvas-theme-dark .canvas-file-preview { background: #3a3b40; color: #f1f1f3; }
.canvas-theme-dark .canvas-file-download:hover { background: #17466f; color: #c8e5ff; }
.canvas-theme-dark .canvas-markdown-help { border-color: #55575d; color: #d8d9dd; }
.canvas-theme-dark .canvas-toolbar-action { color: #e5e5e7; }
.canvas-theme-dark .canvas-toolbar-action:hover { background: #3a3b40; color: #fff; }
.canvas-theme-dark .canvas-toolbar-action.is-active { background: #4a2528; color: #ffb8bd; }
.canvas-theme-dark .canvas-more > summary, .canvas-theme-dark .canvas-more-action { color: #e5e5e7; }
.canvas-theme-dark .canvas-more > summary:hover, .canvas-theme-dark .canvas-more[open] > summary, .canvas-theme-dark .canvas-more-action:hover { background: #3a3b40; color: #fff; }
.canvas-theme-dark .canvas-more-panel { border-color: #494b51; background: rgba(42,43,47,.98); }
.canvas-theme-dark .canvas-empty { color: #a5a7ad; }
.canvas-theme-dark .canvas-empty strong { color: #ededf0; }
.canvas-theme-dark .canvas-privacy, .canvas-theme-dark .canvas-theme-lock, .canvas-theme-dark .canvas-view-info, .canvas-theme-dark .canvas-view-info a, .canvas-theme-dark .canvas-view-info strong { color: #e5e5e7; }

.canvas-reset-page { max-width: 760px; margin: 32px auto 80px; }
.canvas-reset-back { color: var(--text-muted); font-size: 13px; text-decoration: none; }
.canvas-reset-page h1 { margin: 22px 0 8px; font-size: 26px; }
.canvas-reset-page > p { color: var(--text-muted); font-size: 14px; }
.canvas-reset-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 28px; }
.canvas-reset-choice { display: flex; flex-direction: column; align-items: flex-start; min-height: 190px; padding: 22px; border: 1px solid var(--divider); background: var(--card-bg); }
.canvas-reset-choice strong { font-size: 16px; }
.canvas-reset-choice span { min-height: 52px; margin: 8px 0 18px; color: var(--text-muted); font-size: 13px; line-height: 1.6; }
.canvas-reset-choice form { margin-top: 10px; }
.canvas-reset-choice input[type="file"] { display: block; width: 100%; margin-bottom: 10px; font-size: 12px; }
.canvas-reset-danger .btn { border: 1px solid var(--danger); background: transparent; color: var(--danger); }
.canvas-reset-choice button:disabled { cursor: not-allowed; opacity: .45; }

.canvas-gallery { max-width: 800px; margin: 0 auto 72px; }
.canvas-gallery-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.canvas-gallery-notice { margin-bottom: 16px; padding: 10px 12px; border-left: 3px solid var(--primary); background: var(--primary-light); color: var(--text-secondary); font-size: 13px; }
.canvas-gallery-head h1 { margin: 0; font-size: 24px; }
.canvas-gallery-head p { margin: 5px 0 0; color: var(--text-muted); font-size: 13px; }
.canvas-gallery-item { display: block; color: inherit; text-decoration: none; }
.canvas-gallery-empty { padding: 48px 16px; color: var(--text-muted); text-align: center; }

.canvas-detail-page { margin: -20px calc(50% - 50vw) 72px; }
.canvas-public-hero { height: calc(100dvh - var(--nav-height, 44px)); min-height: 520px; }
.canvas-view-app { width: 100%; height: 100%; min-height: 520px; margin: 0; border: 0; }
.canvas-view-info, .canvas-view-actions { position: absolute; z-index: 30; top: 16px; border: 1px solid rgba(0,0,0,.1); background: rgba(255,255,255,.96); box-shadow: 0 4px 16px rgba(0,0,0,.08); }
.canvas-view-info { left: 16px; display: flex; align-items: center; gap: 10px; max-width: min(560px, calc(100vw - 32px)); padding: 9px 11px; }
.canvas-view-info > a { color: var(--text); font-size: 20px; text-decoration: none; }
.canvas-view-info > div { display: flex; min-width: 0; flex-direction: column; }
.canvas-view-info > div > span, .canvas-view-info small { color: var(--text-muted); font-size: 10px; }
.canvas-view-info strong { overflow: hidden; color: var(--text); font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.canvas-view-info > div > a { overflow: hidden; color: var(--text-muted); font-size: 11px; text-decoration: none; text-overflow: ellipsis; white-space: nowrap; }
.canvas-view-info .canvas-theme-lock { margin-left: 8px; }
.canvas-view-actions { right: 16px; display: flex; align-items: center; gap: 2px; padding: 6px; }
.canvas-view-actions .action-btn { min-width: 36px; height: 34px; justify-content: center; padding: 6px 8px; }
.canvas-detail-content { max-width: 920px; margin: 0 auto; padding: 28px 20px 0; }
.canvas-version-panel { position: absolute; z-index: 31; top: 120px; right: 16px; width: 300px; max-height: calc(100% - 150px); padding: 12px; overflow-y: auto; border: 1px solid rgba(0,0,0,.12); background: rgba(255,255,255,.98); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.canvas-version-panel[hidden] { display: none; }
.canvas-version-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.canvas-version-head strong { font-size: 13px; }
.canvas-version-head button { width: 28px; height: 28px; border: 0; background: transparent; cursor: pointer; font-size: 20px; }
.canvas-version-list { display: flex; flex-direction: column; gap: 4px; color: #777980; font-size: 12px; }
.canvas-version-item { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 9px 8px; border-bottom: 1px solid #ececef; }
.canvas-version-item > div { display: flex; min-width: 0; flex-direction: column; }
.canvas-version-item strong { overflow: hidden; color: #292a2f; font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.canvas-version-item span { color: #85868c; font-size: 10px; }
.canvas-version-item button { flex-shrink: 0; padding: 5px 8px; border: 1px solid #d7d8dc; background: #fff; color: #404147; cursor: pointer; font-size: 11px; }
.canvas-theme-dark .canvas-version-panel { border-color: #3b3d42; background: rgba(35,36,39,.98); }
.canvas-theme-dark .canvas-version-item { border-color: #44464b; }
.canvas-theme-dark .canvas-version-item strong { color: #f1f1f3; }
.canvas-theme-dark .canvas-version-item button { border-color: #55575d; background: #303136; color: #e5e5e7; }
.canvas-comments { min-height: calc(100dvh - var(--nav-height, 44px) - 64px); margin-top: 16px; scroll-margin-top: 64px; }
.canvas-comments h2 { margin: 0 0 14px; font-size: 16px; }
.canvas-comment-form, .canvas-reply-form { display: flex; align-items: flex-end; gap: 8px; margin-bottom: 16px; }
.canvas-comment-form textarea, .canvas-reply-form textarea { flex: 1; min-height: 40px; padding: 8px 10px; border: 1px solid var(--input-border); border-radius: 4px; background: var(--input-bg); color: var(--text); font: inherit; font-size: 13px; resize: vertical; }
.canvas-comment-avatar { width: 20px; height: 20px; border-radius: 50%; object-fit: cover; }
.canvas-comment-form button, .canvas-reply-form button { flex-shrink: 0; }
.canvas-login-tip, .canvas-no-comments { padding: 18px; }
.canvas-replies { margin: 6px 0 0 20px; }
.canvas-replies summary { color: var(--primary); cursor: pointer; font-size: 11px; }
.canvas-reply { margin-top: 7px; padding: 8px 0 8px 12px; border-left: 2px solid var(--primary-ring); color: var(--text-secondary); font-size: 13px; }
.canvas-reply > span { color: var(--primary); }
.canvas-reply > div { display: flex; gap: 4px; margin-top: 4px; }
.canvas-reply-form { margin: 8px 0 0; }
.canvas-comment-pagination { padding-bottom: 24px; }
@media (max-width: 760px) {
  .canvas-app { height: calc(100dvh - var(--nav-height, 44px)); min-height: 440px; margin-top: -20px; }
  .canvas-toolbar { top: 54px; width: calc(100vw - 16px); }
  .canvas-toolbar-scroll { overflow-x: auto; }
  .canvas-toolbar-actions { margin-left: 4px; }
  .canvas-toolbar-action { width: 34px; min-width: 34px; justify-content: center; overflow: hidden; padding: 0; }
  .canvas-toolbar-action span { display: none; }
  .canvas-more > summary { width: 34px; }
  .canvas-area-tabs { top: 6px; width: calc(100vw - 16px); }
  .canvas-area-tabs a { flex: 1; padding: 8px 4px; text-align: center; white-space: nowrap; }
  .canvas-browser { top: 106px; left: 8px; width: 160px; }
  .canvas-tool { min-width: 62px; }
  .canvas-tool b { display: none; }
  .canvas-save-state, .canvas-size span { display: none; }
  .canvas-theme-lock span { display: none; }
  .canvas-app[data-mode="draw"] .canvas-draw-tools { max-width: 420px; }
  .canvas-spectrum span { display: none; }
  .canvas-size input { width: 54px; }
  .canvas-reset-page { margin: 20px 16px 60px; }
  .canvas-reset-actions { grid-template-columns: 1fr; }
  .canvas-gallery-head { align-items: flex-start; flex-direction: column; }
  .canvas-detail-page { margin-top: -20px; }
  .canvas-public-hero, .canvas-view-app { min-height: 480px; }
  .canvas-view-info { top: 8px; left: 8px; max-width: calc(100vw - 16px); }
  .canvas-view-info .canvas-save-state { display: none; }
  .canvas-view-actions { top: auto; right: 8px; bottom: 54px; }
  .canvas-version-panel { top: 108px; right: 8px; width: min(300px, calc(100vw - 16px)); }
  .canvas-detail-content { padding: 20px 8px 0; }
  .canvas-comment-form, .canvas-reply-form { align-items: stretch; flex-direction: column; }
  .canvas-access-scope { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .canvas-app[data-delete-mode="1"] .canvas-item { animation: none; }
}