:root {
  color-scheme: dark;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-synthesis: none;
  --ink: #f3f1ff;
  --muted: #a5a2bd;
  --subtle: #77748f;
  --line: rgba(218, 214, 255, .13);
  --panel: rgba(31, 29, 53, .91);
  --violet: #9b91eb;
  --mint: #8dd8bd;
}
* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; }
body { min-width: 320px; background: #17152b; color: var(--ink); }
button, a { font: inherit; }
button { color: inherit; cursor: pointer; }
button:focus-visible, input:focus-visible + span { outline: 2px solid #bcb4ff; outline-offset: 3px; }
.app-shell { position: relative; width: 100%; height: 100%; min-height: 600px; overflow: hidden; isolation: isolate; background: #17152b; }
.scene { position: absolute; inset: 0; z-index: 0; }
.scene canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.topbar { position: absolute; inset: 0 0 auto; z-index: 4; height: 76px; display: flex; align-items: center; justify-content: space-between; padding: 0 32px; border-bottom: 1px solid rgba(226,223,255,.09); background: rgba(24,22,43,.74); backdrop-filter: blur(16px); }
.brand { display: flex; align-items: center; gap: 11px; color: inherit; text-decoration: none; }
.brand-mark { display: grid; width: 38px; height: 38px; place-items: center; border: 1px solid rgba(190,183,255,.27); border-radius: 11px; color: #c6bfff; background: rgba(154,144,236,.14); }
.brand-mark svg { width: 19px; height: 19px; }
.brand-copy { display: grid; gap: 3px; }
.brand-copy strong { font-size: 14px; font-weight: 800; }
.brand-copy small { color: var(--muted); font-size: 10px; }
.lesson-title { position: absolute; left: 50%; transform: translateX(-50%); color: #cfccdf; font-size: 11px; font-weight: 650; }
.lesson-dot, .stage-indicator { display: inline-block; width: 6px; height: 6px; margin-right: 7px; border-radius: 50%; background: #a2dec2; box-shadow: 0 0 10px rgba(133,222,187,.45); vertical-align: 1px; }
.title-divider { padding: 0 9px; color: #716e88; }
.top-actions { display: flex; align-items: center; gap: 13px; }
.mode-status { padding: 7px 10px; border: 1px solid var(--line); border-radius: 20px; color: #c4c0d8; font-size: 10px; }
.icon-button { position: relative; display: grid; width: 34px; height: 34px; place-items: center; border: 1px solid var(--line); border-radius: 9px; background: rgba(255,255,255,.04); color: #c4c0d8; }
.icon-button:hover { background: rgba(255,255,255,.1); }
.icon-button svg { width: 16px; height: 16px; }
[data-tooltip]::after { position: absolute; right: 0; bottom: calc(100% + 7px); display: none; padding: 5px 7px; border-radius: 4px; color: white; background: #11101f; content: attr(data-tooltip); font-size: 10px; white-space: nowrap; }
[data-tooltip]:hover::after { display: block; }
.scene-copy { position: absolute; top: 20%; left: clamp(28px, 5vw, 78px); z-index: 2; width: min(340px, 31vw); pointer-events: none; text-shadow: 0 1px 12px rgba(16,14,32,.45); }
.eyebrow { margin: 0 0 15px; color: #b6afd9; font-size: 9px; font-weight: 800; letter-spacing: 1.5px; }
.eyebrow span { margin-right: 8px; color: #8f88b5; }
.scene-copy h1 { max-width: 330px; margin: 0 0 12px; font-size: 28px; line-height: 1.3; font-weight: 800; }
.scene-copy > p:not(.eyebrow) { max-width: 285px; margin: 0; color: #b4b0c8; font-size: 12px; line-height: 1.9; }
.scene-caption { display: flex; align-items: center; gap: 9px; margin-top: 22px; color: #9b97b4; font-size: 10px; }
.caption-icon { display: grid; width: 28px; height: 28px; place-items: center; border: 1px solid rgba(211,207,245,.17); border-radius: 8px; background: rgba(255,255,255,.045); color: #c2bee0; }
.caption-icon svg { width: 15px; height: 15px; }
.view-tag { position: absolute; bottom: 105px; left: 43%; z-index: 2; display: flex; align-items: center; gap: 10px; min-width: 152px; padding: 10px 13px; border: 1px solid rgba(222,218,255,.16); border-radius: 11px; background: rgba(30,28,51,.73); box-shadow: 0 8px 26px rgba(8,7,20,.18); backdrop-filter: blur(12px); transform: translateX(-50%); transition: opacity .18s; }
.view-tag.is-hidden { opacity: 0; }
.view-tag-icon { display: grid; width: 29px; height: 29px; place-items: center; border-radius: 8px; color: #c4baff; background: rgba(146,134,224,.17); }
.view-tag-icon svg { width: 15px; height: 15px; }
.view-tag > span:last-child { display: grid; gap: 2px; }
.view-tag small { color: #9894ae; font-size: 9px; }
.view-tag strong { font-size: 11px; }
.builder-panel { position: absolute; top: 24px; right: 24px; bottom: 24px; z-index: 3; display: flex; width: 266px; flex-direction: column; padding: 20px 17px 13px; border: 1px solid rgba(222,218,255,.13); border-radius: 13px; background: var(--panel); box-shadow: 0 18px 50px rgba(7,6,20,.22); backdrop-filter: blur(18px); transition: width .22s ease, padding .22s ease, background .22s ease; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.panel-toggle { display: grid; width: 26px; height: 26px; flex: 0 0 26px; place-items: center; border: 1px solid rgba(210,205,245,.18); border-radius: 7px; color: #bdb7dc; background: rgba(255,255,255,.045); }
.panel-toggle:hover { color: #fff; background: rgba(255,255,255,.11); }
.panel-toggle svg { width: 14px; height: 14px; transition: transform .22s ease; }
.panel-content { display: flex; min-height: 0; flex: 1; flex-direction: column; }
.panel-quick-actions { display: none; }
.builder-panel.is-collapsed { right: 8px; width: 48px; padding: 12px 7px; }
.builder-panel.is-collapsed .panel-heading { justify-content: center; margin-bottom: 0; }
.builder-panel.is-collapsed .panel-heading > div, .builder-panel.is-collapsed .block-counter, .builder-panel.is-collapsed .panel-content { display: none; }
.builder-panel.is-collapsed .panel-toggle svg { transform: rotate(180deg); }
.builder-panel.is-collapsed .panel-quick-actions { display: flex; flex-direction: column; align-items: center; gap: 7px; margin-top: 12px; }
.panel-quick-actions button { position: relative; display: grid; width: 32px; height: 32px; place-items: center; padding: 0; border: 1px solid rgba(210,205,245,.15); border-radius: 8px; color: #bdb7dc; background: rgba(255,255,255,.045); }
.panel-quick-actions button:hover, .panel-quick-actions button:focus-visible { color: #f4f0ff; border-color: rgba(199,188,255,.43); background: rgba(155,143,235,.2); }
.panel-quick-actions button.is-active { color: #f4f0ff; border-color: rgba(141,216,189,.5); background: rgba(91,174,151,.17); }
.panel-quick-actions button svg { width: 15px; height: 15px; }
.panel-quick-actions .view-letter { display: grid; width: 100%; height: 100%; place-items: center; font-size: 14px; font-weight: 850; line-height: 1; }
.axis-icon { position: relative; display: inline-block; width: 22px; height: 19px; flex: 0 0 22px; font-family: Arial, sans-serif; font-size: 7px; font-weight: 850; line-height: 1; }
.axis-icon::before, .axis-icon::after { position: absolute; display: block; background: currentColor; content: ""; opacity: .48; }
.axis-icon::before { top: 9px; left: 2px; width: 18px; height: 1px; transform: rotate(-24deg); transform-origin: left center; }
.axis-icon::after { top: 3px; left: 10px; width: 1px; height: 15px; transform: rotate(26deg); transform-origin: center; }
.axis-icon b { position: absolute; z-index: 1; font-style: normal; }
.axis-icon .axis-x { top: 9px; right: 0; color: #78aef4; }
.axis-icon .axis-y { top: 9px; left: 0; color: #67c8e8; }
.axis-icon .axis-z { top: 0; left: 9px; color: #70d39d; }
.panel-quick-actions [data-tooltip]::after { top: 50%; right: calc(100% + 8px); bottom: auto; transform: translateY(-50%); }
.builder-panel[data-position="left"] .panel-quick-actions [data-tooltip]::after { right: auto; left: calc(100% + 8px); }
.quick-separator { width: 24px; height: 1px; margin: 2px 0; background: rgba(210,205,245,.17); }
.section-kicker { color: #9994b6; font-size: 8px; font-weight: 800; letter-spacing: 1.3px; }
.panel-heading h2 { margin: 5px 0 0; font-size: 17px; }
.block-counter { display: inline-flex; align-items: center; gap: 7px; min-width: 49px; justify-content: center; padding: 7px 9px; border: 1px solid var(--line); border-radius: 8px; color: #c5bfff; background: rgba(255,255,255,.035); font-size: 11px; }
.block-counter svg { width: 14px; height: 14px; }
.block-counter b { color: #e9e6fa; font-size: 11px; }
.block-actions { display: grid; grid-template-columns: minmax(0, 1fr) 94px; gap: 6px; }
.add-button, .delete-button { position: relative; display: flex; min-height: 43px; align-items: center; justify-content: center; gap: 7px; border-radius: 8px; font-size: 11px; font-weight: 850; transition: background .15s, transform .15s; }
.add-button { border: 1px solid rgba(203,195,255,.33); color: #211d38; background: #c2b9ff; box-shadow: 0 5px 18px rgba(126,110,223,.13); }
.add-button:hover { transform: translateY(-1px); background: #d4ceff; }
.delete-button { border: 1px solid rgba(236,177,173,.28); color: #e3b6b2; background: rgba(172,89,97,.13); }
.delete-button:hover { transform: translateY(-1px); border-color: rgba(245,187,179,.46); background: rgba(188,99,105,.23); }
.add-button svg, .delete-button svg { width: 15px; height: 15px; }
.selection-note { display: flex; align-items: center; gap: 7px; min-height: 31px; color: #a7a3bc; font-size: 9px; }
.selection-mark { width: 6px; height: 6px; border-radius: 50%; background: #8fdda9; box-shadow: 0 0 0 3px rgba(143,221,169,.11); }
.color-editor { margin-top: 2px; padding: 9px 10px 10px; border: 1px solid rgba(215,208,246,.1); border-radius: 8px; background: rgba(255,255,255,.028); }
.color-editor-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; color: #c6c1db; font-size: 10px; font-weight: 750; }
.color-editor-heading > span { display: flex; align-items: center; gap: 6px; }
.color-editor-heading svg { width: 13px; height: 13px; color: #bcb2ee; }
.color-editor-heading small { color: #8f8aa6; font-size: 8px; font-weight: 500; }
.color-editor-controls { display: flex; align-items: center; gap: 9px; }
#colorPicker { width: 28px; height: 28px; padding: 2px; border: 1px solid rgba(220,214,248,.25); border-radius: 7px; background: transparent; cursor: pointer; }
.color-swatches { display: flex; flex: 1; justify-content: space-between; gap: 5px; }
.color-swatch { width: 21px; height: 21px; padding: 0; border: 2px solid transparent; border-radius: 50%; background: var(--swatch); box-shadow: inset 0 0 0 1px rgba(255,255,255,.23); }
.color-swatch:hover, .color-swatch.is-active { border-color: #f5f1ff; box-shadow: 0 0 0 2px rgba(194,185,255,.33), inset 0 0 0 1px rgba(255,255,255,.35); }
.panel-divider { width: 100%; height: 1px; margin: 11px 0 16px; background: var(--line); }
.panel-label { display: flex; justify-content: space-between; align-items: center; margin-bottom: 9px; font-size: 11px; font-weight: 750; }
.panel-label small { color: #8d89a4; font-size: 9px; font-weight: 500; }
.view-buttons { display: grid; gap: 6px; }
.view-button { display: grid; grid-template-columns: 27px 1fr 14px; min-height: 42px; align-items: center; gap: 9px; padding: 0 10px; border: 1px solid transparent; border-radius: 7px; background: rgba(255,255,255,.035); color: #dad7e9; text-align: left; font-size: 11px; font-weight: 700; transition: .15s; }
.view-button:hover, .view-button.is-active { border-color: rgba(184,173,255,.29); background: rgba(149,135,231,.15); color: #eeeaff; }
.view-button > svg { width: 13px; height: 13px; color: #928cae; }
.view-glyph { position: relative; display: grid; width: 24px; height: 24px; place-items: center; border: 1px solid rgba(205,199,240,.19); border-radius: 6px; color: #c5baff; }
.view-glyph::before, .view-glyph::after, .view-glyph i::before, .view-glyph i::after { position: absolute; display: block; content: ""; background: currentColor; opacity: .85; }
.glyph-front::before { width: 10px; height: 9px; border: 1px solid currentColor; background: transparent; }
.glyph-front::after { width: 1px; height: 12px; }
.glyph-side::before { width: 8px; height: 10px; border: 1px solid currentColor; background: transparent; transform: skewY(-20deg); }
.glyph-top::before { width: 10px; height: 7px; border: 1px solid currentColor; background: transparent; transform: rotate(45deg); }
.return-button { display: flex; min-height: 37px; align-items: center; justify-content: center; gap: 7px; margin-top: 8px; border: 1px solid rgba(178,169,245,.23); border-radius: 7px; color: #c9c3ed; background: rgba(148,136,221,.1); font-size: 10px; font-weight: 700; }
.return-button:hover { background: rgba(148,136,221,.2); }
.return-button svg { width: 14px; height: 14px; }
.return-button[hidden] { display: none; }
.utility-divider { margin: 15px 0 10px; }
.utility-row { display: flex; min-height: 34px; align-items: center; justify-content: space-between; }
.utility-title { display: flex; align-items: center; gap: 7px; color: #c0bdd1; font-size: 10px; }
.utility-title svg { width: 14px; height: 14px; color: #9691af; }
.utility-title .axis-icon { margin-right: 1px; }
.switch { position: relative; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.switch input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.switch > span { position: relative; width: 27px; height: 15px; border: 1px solid rgba(210,206,239,.2); border-radius: 99px; background: rgba(255,255,255,.1); transition: .15s; }
.switch > span::after { position: absolute; top: 2px; left: 2px; width: 9px; height: 9px; border-radius: 50%; background: #a09cb0; content: ""; transition: .15s; }
.switch input:checked + span { border-color: #8fdbbb; background: rgba(117,201,164,.27); }
.switch input:checked + span::after { left: 14px; background: #a8edcb; }
.switch b { min-width: 24px; color: #a6a2b8; font-size: 9px; font-weight: 500; }
.switch input:checked ~ b { color: #b8e4cf; }
.panel-footer { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin-top: auto; }
.quiet-button { display: flex; min-height: 34px; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--line); border-radius: 7px; color: #aaa6bd; background: rgba(255,255,255,.025); font-size: 9px; }
.quiet-button:hover { color: #e1def2; background: rgba(255,255,255,.075); }
.quiet-button svg { width: 13px; height: 13px; }
.stage-footer { position: absolute; bottom: 24px; left: 32px; z-index: 2; color: #9d99b2; font-size: 9px; }
.stage-indicator { width: 5px; height: 5px; margin-right: 5px; }
.footer-divider { display: inline-block; height: 10px; margin: 0 9px; border-left: 1px solid rgba(211,207,236,.24); vertical-align: -2px; }
.toast { position: absolute; bottom: 62px; left: 50%; z-index: 10; padding: 9px 13px; border: 1px solid rgba(220,216,249,.16); border-radius: 7px; color: #f7f5ff; background: rgba(45,42,72,.95); box-shadow: 0 10px 30px rgba(4,3,16,.3); font-size: 10px; opacity: 0; pointer-events: none; transform: translate(-50%, 8px); transition: .18s; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
@media (max-width: 760px) {
  .app-shell { min-height: 0; }
  .topbar { height: 62px; padding: 0 14px; }
  .brand-mark { width: 34px; height: 34px; }
  .brand-copy strong { font-size: 12px; }
  .brand-copy small { font-size: 9px; }
  .lesson-title { display: none; }
  .top-actions { gap: 8px; }
  .mode-status { padding: 6px 8px; font-size: 9px; }
  .icon-button { width: 31px; height: 31px; }
  .scene-copy { top: 79px; left: 17px; width: min(245px, 57vw); }
  .eyebrow { margin-bottom: 8px; font-size: 8px; }
  .scene-copy h1 { margin-bottom: 6px; font-size: 19px; }
  .scene-copy > p:not(.eyebrow) { max-width: 220px; font-size: 10px; line-height: 1.6; }
  .scene-caption { gap: 6px; margin-top: 9px; font-size: 8px; }
  .caption-icon { width: 23px; height: 23px; }
  .builder-panel { top: auto; right: 9px; bottom: max(9px, env(safe-area-inset-bottom)); left: 9px; width: auto; max-height: 47vh; overflow-y: auto; padding: 10px 12px 9px; border-radius: 11px; }
  .builder-panel.is-collapsed { top: 50%; right: 9px; bottom: auto; left: auto; width: 48px; height: 282px; max-height: none; padding: 10px 7px; transform: translateY(-50%); }
  .panel-heading { margin-bottom: 7px; }
  .panel-heading h2 { margin-top: 2px; font-size: 13px; }
  .section-kicker { font-size: 7px; }
  .block-counter { padding: 5px 7px; }
  .add-button, .delete-button { min-height: 37px; }
  .delete-button { font-size: 10px; }
  .selection-note { min-height: 23px; font-size: 8px; }
  .color-editor { padding: 7px 8px 8px; }
  .color-editor-heading { margin-bottom: 6px; font-size: 9px; }
  .color-editor-heading small { font-size: 7px; }
  .color-swatch { width: 19px; height: 19px; }
  .panel-divider { margin: 6px 0 8px; }
  .panel-label { margin-bottom: 6px; font-size: 9px; }
  .view-buttons { grid-template-columns: repeat(3, 1fr); gap: 5px; }
  .view-button { grid-template-columns: 20px 1fr; min-height: 34px; gap: 5px; padding: 0 6px; font-size: 9px; }
  .view-button > svg { display: none; }
  .view-glyph { width: 19px; height: 19px; }
  .glyph-front::before, .glyph-top::before { transform: scale(.8); }
  .return-button { min-height: 30px; margin-top: 5px; }
  .utility-divider { margin: 6px 0 4px; }
  .utility-row { min-height: 27px; }
  .utility-title { font-size: 9px; }
  .switch > span { width: 25px; height: 14px; }
  .switch input:checked + span::after { left: 13px; }
  .panel-footer { grid-template-columns: 1fr 1fr; margin-top: 5px; }
  .quiet-button { min-height: 29px; }
  .stage-footer { bottom: calc(47vh + 17px); left: 14px; font-size: 8px; }
  .view-tag { bottom: calc(47vh + 42px); min-width: 126px; padding: 7px 9px; }
  .view-tag-icon { width: 24px; height: 24px; }
}
@media (max-height: 700px) and (min-width: 761px) {
  .builder-panel { top: 83px; bottom: 47px; padding-top: 13px; padding-bottom: 9px; }
  .panel-heading { margin-bottom: 10px; }
  .panel-divider { margin-top: 8px; margin-bottom: 10px; }
  .utility-divider { margin-top: 10px; margin-bottom: 5px; }
  .utility-row { min-height: 29px; }
}

/* 工具栏按钮较多，矮屏（平板横屏等）收紧间距，避免最下面的按钮溢出面板 */
@media (max-height: 900px) and (min-width: 761px) {
  .builder-panel.is-collapsed { padding: 10px 7px; }
  .builder-panel.is-collapsed .panel-quick-actions { gap: 4px; margin-top: 8px; }
  .panel-quick-actions button { width: 28px; height: 28px; border-radius: 7px; }
  .panel-quick-actions button svg { width: 14px; height: 14px; }
  .panel-quick-actions .view-letter { font-size: 13px; }
  .quick-separator { margin: 1px 0; }
}

/* 更矮的窗口（平板横屏 + 浏览器工具栏）再收一档 */
@media (max-height: 720px) and (min-width: 761px) {
  .builder-panel.is-collapsed { padding: 8px 7px; }
  .builder-panel.is-collapsed .panel-quick-actions { gap: 3px; margin-top: 6px; }
  .panel-quick-actions button { width: 26px; height: 26px; }
  .panel-quick-actions button svg { width: 13px; height: 13px; }
  .panel-quick-actions .view-letter { font-size: 12px; }
}


/* The compact toolbar is the primary control surface. */
/* 按钮较多，高度不够时可以上下滑动（平板触摸滑动同样有效），并隐藏滚动条保持简洁 */
/* 折叠态面板本身不裁剪：位置/颜色弹层是绝对定位在面板外侧的，一旦被裁就点不到 */
.builder-panel.is-collapsed { top: 24px; right: 8px; bottom: 24px; left: auto; width: 48px; height: auto; padding: 12px 7px; transform: none; overflow: visible; }
.builder-panel.is-hidden { display: none; }
.builder-panel.is-collapsed .panel-heading { justify-content: center; margin-bottom: 0; }
.builder-panel.is-collapsed .panel-heading > div, .builder-panel.is-collapsed .block-counter, .builder-panel.is-collapsed .panel-content { display: none; }
/* 折叠态：按钮区自己滚动，面板保持 overflow:visible，否则位置/颜色弹层会被裁掉 */
.builder-panel.is-collapsed .panel-quick-actions { display: flex; flex: 1 1 auto; min-height: 0; overflow-y: auto; overflow-x: hidden; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.builder-panel.is-collapsed .panel-quick-actions::-webkit-scrollbar { width: 0; height: 0; }
.builder-panel.is-collapsed .panel-heading { flex: 0 0 auto; }
.builder-panel[data-position="top"].is-collapsed .panel-quick-actions,
.builder-panel[data-position="bottom"].is-collapsed .panel-quick-actions { overflow-y: hidden; overflow-x: auto; }
.builder-panel[data-position="left"].is-collapsed { right: auto; left: 8px; }
.builder-panel[data-position="top"].is-collapsed, .builder-panel[data-position="bottom"].is-collapsed { right: auto; left: 50%; width: auto; height: 48px; flex-direction: row; padding: 7px 10px; transform: translateX(-50%); }
.builder-panel[data-position="top"].is-collapsed { top: 8px; bottom: auto; }
.builder-panel[data-position="bottom"].is-collapsed { top: auto; bottom: 8px; }
.builder-panel[data-position="top"] .panel-quick-actions, .builder-panel[data-position="bottom"] .panel-quick-actions { flex-direction: row; margin-top: 0; }
.builder-panel[data-position="top"] .quick-separator, .builder-panel[data-position="bottom"] .quick-separator { width: 1px; height: 24px; margin: 0 2px; }
.color-editor { display: none; }
.builder-panel.is-color-open .color-editor { position: absolute; top: 50%; right: 58px; z-index: 8; display: block; width: 214px; margin: 0; transform: translateY(-50%); }
.builder-panel[data-position="left"].is-color-open .color-editor { right: auto; left: 58px; }
.builder-panel[data-position="top"].is-color-open .color-editor { top: 58px; right: 50%; transform: translateX(50%); }
.builder-panel[data-position="bottom"].is-color-open .color-editor { top: auto; right: 50%; bottom: 58px; transform: translateX(50%); }
.toolbar-position-popover { position: absolute; top: 50%; right: 58px; z-index: 8; display: none; width: 150px; padding: 9px; border: 1px solid rgba(222,218,255,.16); border-radius: 10px; background: rgba(31,29,53,.98); box-shadow: 0 16px 34px rgba(7,6,20,.32); transform: translateY(-50%); }
.builder-panel.is-position-open .toolbar-position-popover { display: grid; gap: 4px; }
.toolbar-position-popover small { padding: 2px 4px 5px; color: #9f9ab7; font-size: 9px; }
.toolbar-position-popover button { display: flex; min-height: 28px; align-items: center; gap: 7px; padding: 0 7px; border: 1px solid transparent; border-radius: 6px; color: #c8c3dc; background: rgba(255,255,255,.035); font-size: 10px; text-align: left; }
.toolbar-position-popover button:hover, .toolbar-position-popover button.is-active { border-color: rgba(194,184,255,.32); background: rgba(154,141,233,.16); }
.toolbar-position-popover button svg { width: 13px; height: 13px; }
.builder-panel[data-position="left"] .toolbar-position-popover { right: auto; left: 58px; }
.builder-panel[data-position="top"] .toolbar-position-popover { top: 58px; right: 50%; transform: translateX(50%); }
.builder-panel[data-position="bottom"] .toolbar-position-popover { top: auto; right: 50%; bottom: 58px; transform: translateX(50%); }
.toolbar-wake { position: absolute; z-index: 6; display: none; width: 34px; height: 46px; place-items: center; padding: 0; border: 1px solid rgba(210,205,245,.22); border-radius: 9px; color: #c8c2df; background: rgba(31,29,53,.94); box-shadow: 0 12px 30px rgba(7,6,20,.28); }
.toolbar-wake.is-visible { display: grid; }
.toolbar-wake[data-position="right"] { top: 50%; right: 0; transform: translateY(-50%); }
.toolbar-wake[data-position="left"] { top: 50%; left: 0; transform: translateY(-50%); }
.toolbar-wake[data-position="top"] { top: 0; left: 50%; transform: translateX(-50%); }
.toolbar-wake[data-position="bottom"] { bottom: 0; left: 50%; transform: translateX(-50%); }
.toolbar-wake[data-position="left"] svg, .toolbar-wake[data-position="top"] svg, .toolbar-wake[data-position="bottom"] svg { transform: rotate(180deg); }
.toolbar-wake[data-position="top"] svg { transform: rotate(90deg); }
.toolbar-wake[data-position="bottom"] svg { transform: rotate(-90deg); }
@media (max-width: 760px) {
  .builder-panel.is-collapsed { top: 50%; right: 9px; bottom: auto; left: auto; height: 282px; transform: translateY(-50%); }
  .builder-panel[data-position="left"].is-collapsed { right: auto; left: 9px; }
  .builder-panel[data-position="top"].is-collapsed, .builder-panel[data-position="bottom"].is-collapsed { top: 8px; bottom: auto; height: 48px; transform: translateX(-50%); }
  .builder-panel[data-position="bottom"].is-collapsed { top: auto; bottom: 8px; }
  .builder-panel.is-color-open .color-editor { right: 57px; }
  .builder-panel[data-position="top"].is-color-open .color-editor, .builder-panel[data-position="bottom"].is-color-open .color-editor { right: 50%; }
}

/* ---------- 展示场景（只读） ---------- */
/* 工具栏里的展示场景入口：用展示场景自己的薄荷色，和其它工具图标区分开 */
.panel-quick-actions [data-quick-action="showcase"] { color: #0d3f38; border-color: rgba(160,235,203,.55); background: linear-gradient(135deg, #8fe3c3, #6fd0b8); box-shadow: 0 6px 16px rgba(10,60,58,.28); }
.panel-quick-actions [data-quick-action="showcase"]:hover,
.panel-quick-actions [data-quick-action="showcase"]:focus-visible { color: #082e29; border-color: rgba(190,245,220,.75); background: linear-gradient(135deg, #a6efd3, #86dbc4); transform: translateY(-1px); }
.showcase-ui { position: absolute; inset: 0; z-index: 5; pointer-events: none; }
.showcase-ui.is-hidden { display: none; }
.showcase-ui > * { pointer-events: none; }

.showcase-topbar { position: absolute; top: 22px; right: 24px; left: 24px; display: flex; align-items: center; justify-content: flex-end; gap: 12px; }
.showcase-back { display: inline-flex; align-items: center; gap: 7px; min-height: 38px; padding: 0 15px; border: 1px solid rgba(255,255,255,.75); border-radius: 11px; color: #123c52; background: rgba(255,255,255,.82); box-shadow: 0 10px 24px rgba(23,86,110,.14); font-size: 11px; font-weight: 850; backdrop-filter: blur(14px); transition: background .15s, transform .15s; pointer-events: auto; }
.showcase-back:hover { background: #fff; transform: translateY(-1px); }
.showcase-back svg { width: 15px; height: 15px; }

.showcase-controls { position: absolute; bottom: 26px; left: 50%; display: flex; align-items: center; gap: 8px; padding: 7px 9px; border: 1px solid rgba(255,255,255,.72); border-radius: 14px; background: rgba(255,255,255,.76); box-shadow: 0 14px 30px rgba(23,86,110,.16); backdrop-filter: blur(14px); transform: translateX(-50%); pointer-events: auto; }
.showcase-trigger-group { display: flex; align-items: center; gap: 6px; }
.showcase-trigger { display: grid; width: 44px; height: 40px; place-items: center; border: 1px solid rgba(255,255,255,.68); border-radius: 11px; color: #1c5a6b; background: rgba(255,255,255,.74); font-size: 17px; font-weight: 900; line-height: 1; transition: 150ms ease; }
.showcase-trigger:hover { color: #0d7d7a; background: #fff; }
.showcase-trigger.is-active { color: #fff; border-color: rgba(23,168,164,.55); background: #17a8a4; box-shadow: 0 8px 18px rgba(20,168,167,.3); }
.showcase-divider { width: 1px; height: 24px; background: rgba(23,108,128,.22); }
.showcase-ui.is-empty .showcase-trigger-group,
.showcase-ui.is-empty .showcase-divider { display: none; }
.showcase-control { position: relative; display: grid; width: 36px; height: 36px; place-items: center; border: 1px solid rgba(255,255,255,.68); border-radius: 10px; color: #236377; background: rgba(255,255,255,.74); }
.showcase-control:hover { color: #0d7d7a; background: #fff; }
.showcase-control svg { width: 16px; height: 16px; }
.showcase-control[data-tooltip]::after { right: auto; bottom: calc(100% + 9px); top: auto; left: 50%; color: #fff; background: #14526b; transform: translateX(-50%); }

.showcase-empty { position: absolute; top: 50%; left: 50%; display: grid; width: 286px; justify-items: center; gap: 7px; padding: 26px 22px; border: 1px solid rgba(255,255,255,.78); border-radius: 18px; color: #123c52; text-align: center; background: rgba(255,255,255,.88); box-shadow: 0 20px 44px rgba(23,86,110,.18); backdrop-filter: blur(16px); transform: translate(-50%, -50%); pointer-events: none; }
.showcase-empty.is-hidden { display: none; }
.showcase-empty svg { width: 30px; height: 30px; color: #17a8a4; }
.showcase-empty strong { font-size: 14px; }
.showcase-empty span { color: #4d7688; font-size: 11px; line-height: 1.7; }

body.is-showcase .builder-panel,
body.is-showcase .toolbar-wake,
body.is-showcase .stage-footer,
body.is-showcase .view-tag { display: none; }
body.is-showcase .toast { bottom: 88px; }

@media (max-width: 760px) {
  .showcase-topbar { top: 12px; right: 12px; left: 12px; }
  .showcase-back span { display: none; }
  .showcase-back { min-width: 38px; justify-content: center; padding: 0 11px; }
  .showcase-controls { bottom: 14px; }
  .showcase-trigger { width: 40px; height: 38px; font-size: 16px; }
  .showcase-trigger-group { gap: 4px; }
  .showcase-controls { gap: 6px; }
  body.is-showcase .toast { bottom: 96px; }
}