:root {
  --ink: #171717;
  --muted: #77736d;
  --line: #e4e1dc;
  --panel: #ffffff;
  --canvas: #f3f1ed;
  --accent: #e9512c;
  --accent-dark: #c8381a;
  --green: #477d62;
  --tile-size: 84px;
  --user-tile-size: 84px;
  --asset-panel-height: 230px;
  --label-height: 25px;
  font-family: "DM Sans", "Noto Sans TC", sans-serif;
  color: var(--ink);
  background: var(--canvas);
  font-synthesis: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  height: 100dvh;
  overflow: hidden;
  background: var(--canvas);
}

button, input { font: inherit; }
button { color: inherit; }

.app-shell { height: 100dvh; display: flex; flex-direction: column; overflow: hidden; }

.topbar {
  height: 68px;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #171717;
  color: #fff;
  border-bottom: 1px solid #2b2b2b;
  position: sticky;
  top: 0;
  z-index: 30;
}

.brand {
  color: inherit;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 18px;
  font-weight: 700;
}

.brand-mark { display: grid; gap: 3px; width: 22px; }
.brand-mark span { height: 4px; display: block; }
.brand-mark span:nth-child(1) { background: #f26d4b; width: 100%; }
.brand-mark span:nth-child(2) { background: #f2bf50; width: 78%; }
.brand-mark span:nth-child(3) { background: #6ca181; width: 56%; }

.topbar-actions { display: flex; align-items: center; gap: 8px; }
.save-status { color: #aaa6a0; font-size: 13px; display: flex; gap: 7px; align-items: center; margin-right: 9px; }
.save-status svg { width: 16px; }

.button, .icon-button {
  border: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: 160ms ease;
}

.button {
  min-height: 40px;
  padding: 0 15px;
  gap: 8px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
}

.button svg { width: 17px; }
.button-primary { color: #fff; background: var(--accent); }
.button-primary:hover { background: #f2623d; transform: translateY(-1px); }
.button-secondary { background: #fff; border: 1px solid var(--line); }
.button-secondary:hover { border-color: #b9b4ac; background: #faf9f7; }
.button-danger { background: #c73f2e; color: #fff; }
.button-danger:hover { background: #a92f21; }
.button-ghost-danger { width: 100%; color: #a43a2c; background: #f9efec; }
.button-ghost-danger:hover { background: #f4dfda; }

.icon-button {
  width: 38px;
  height: 38px;
  border-radius: 6px;
  background: transparent;
  color: inherit;
  position: relative;
}

.topbar .icon-button:hover { background: #2c2c2c; }
.topbar .icon-button.active { background: #fff; color: #171717; }
.icon-button:disabled { opacity: .35; cursor: default; }
.icon-button svg { width: 18px; height: 18px; }

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  z-index: 60;
  top: calc(100% + 8px);
  left: 50%;
  transform: translate(-50%, -4px);
  padding: 5px 8px;
  background: #111;
  color: #fff;
  font-size: 11px;
  white-space: nowrap;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: 130ms ease;
}

[data-tooltip]:hover::after { opacity: 1; transform: translate(-50%, 0); }

.workspace {
  display: grid;
  grid-template-columns: minmax(520px, 1fr) 252px;
  grid-template-rows: minmax(0, 1fr) clamp(200px, var(--asset-panel-height), 55vh);
  flex: 1;
  min-height: 0;
  height: calc(100dvh - 68px);
  overflow: hidden;
}

.focus-mode { background: #111; }
.focus-mode .topbar, .focus-mode .asset-panel, .focus-mode .settings-panel,
.focus-mode .project-heading, .focus-mode .canvas-footer { display: none; }
.focus-mode .workspace { display: block; min-height: 100vh; }
.focus-mode .canvas-area { width: min(100%, 1600px); min-height: 100vh; margin: 0 auto; padding: 0; background: #111; }
.focus-mode .board-frame { min-height: 100vh; border: 0; box-shadow: none; }
.focus-mode .tier-actions, .focus-mode .row-handle, .focus-mode .asset-edit,
.focus-mode .asset-remove, .focus-mode .asset-visibility { display: none; }
.focus-mode .tier-row { grid-template-columns: 112px 1fr; }
.focus-mode .tier-label-wrap { grid-template-columns: 1fr; }
.focus-mode .tier-name { padding-left: 6px; }

.panel { background: var(--panel); padding: 14px 16px; }
.canvas-area { grid-column: 1; grid-row: 1; }
.asset-panel {
  grid-column: 1;
  grid-row: 2;
  display: grid;
  grid-template-columns: 150px 190px 190px minmax(180px, 1fr);
  align-items: center;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 10px 14px;
  min-height: 0;
  border-top: 1px solid var(--line);
  position: relative;
}
.asset-resize-handle { position: absolute; z-index: 12; top: -7px; left: 0; right: 0; height: 14px; display: grid; place-items: center; cursor: ns-resize; touch-action: none; outline: none; }
.asset-resize-handle span { width: 52px; height: 4px; border-radius: 2px; background: #aaa49c; box-shadow: 0 0 0 3px var(--panel); transition: width 140ms ease, background 140ms ease; }
.asset-resize-handle:hover span, .asset-resize-handle:focus-visible span, .resizing-assets .asset-resize-handle span { width: 72px; background: var(--accent); }
.resizing-assets { cursor: ns-resize; user-select: none; }
.settings-panel { grid-column: 2; grid-row: 1 / span 2; min-height: 0; overflow-y: auto; overscroll-behavior: contain; border-left: 1px solid var(--line); }
.asset-panel-hidden .asset-panel { display: none; }
.asset-panel-hidden .workspace { grid-template-rows: minmax(0, 1fr); }

.panel-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.asset-panel .panel-heading { margin: 0; }
.asset-panel-heading-actions { display: flex; align-items: center; gap: 5px; }
.panel-hide-button { color: #6f6b65; }
.panel-hide-button:hover, .canvas-control:hover { background: #e9e6e1; color: var(--ink); }
.canvas-control.active { background: #26231f; color: #fff; }
.panel-heading h2 { font-size: 18px; margin: 2px 0 0; letter-spacing: 0; }
.eyebrow { margin: 0; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); font-size: 10px; font-weight: 700; }
.count-badge { min-width: 26px; height: 26px; padding: 0 7px; border-radius: 13px; background: #eeece8; display: grid; place-items: center; color: #66615b; font-size: 12px; font-weight: 600; }

.upload-zone {
  min-height: 140px;
  border: 1px dashed #bbb5ad;
  border-radius: 7px;
  background: #faf9f7;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  cursor: pointer;
  transition: 160ms ease;
}
.asset-panel .upload-zone { min-height: 44px; flex-direction: row; gap: 8px; padding: 5px 10px; text-align: left; }
.asset-panel .upload-zone .upload-icon { margin: 0; flex: 0 0 auto; }
.asset-panel .upload-zone > span:last-of-type { display: none; }

.upload-zone:hover, .upload-zone.dragover { border-color: var(--accent); background: #fff5f1; }
.upload-icon { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; background: #f0ece6; color: #5e5a54; margin-bottom: 10px; }
.upload-icon svg { width: 18px; }
.upload-zone strong { font-size: 14px; }
.upload-zone > span:last-of-type { margin-top: 4px; color: var(--muted); font-size: 11px; }
.folder-upload { width: 100%; min-height: 36px; margin-top: 8px; border: 1px solid var(--line); border-radius: 6px; display: flex; align-items: center; justify-content: center; gap: 7px; color: #56514b; background: #fff; cursor: pointer; font-size: 11px; font-weight: 600; transition: 150ms ease; }
.asset-panel .folder-upload { min-height: 44px; margin: 0; }
.folder-upload:hover { border-color: #aaa49c; background: #faf9f7; color: var(--accent); }
.folder-upload svg { width: 15px; }
.format-hint { margin: 8px 2px 0; color: var(--muted); font-size: 9px; line-height: 1.45; text-align: center; }
.asset-panel .format-hint { margin: 0; text-align: left; }

.asset-toolbar { display: flex; justify-content: space-between; margin: 18px 0 10px; font-size: 11px; color: var(--muted); }
.asset-panel .asset-toolbar { grid-column: 1 / -1; margin: 0; padding-top: 7px; border-top: 1px solid #eeece8; }
.text-button { padding: 0; border: 0; background: none; color: #77716a; cursor: pointer; font-size: 11px; }
.text-button:hover { color: var(--accent); }

.asset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  min-height: 80px;
  align-content: start;
}
.asset-panel .asset-grid {
  grid-column: 1 / -1;
  grid-row: 3;
  grid-template-columns: repeat(auto-fill, minmax(88px, 112px));
  height: 100%;
  max-height: none;
  min-height: 0;
  padding: 2px 8px 2px 2px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}
.asset-panel .asset-grid::-webkit-scrollbar { width: 9px; }
.asset-panel .asset-grid::-webkit-scrollbar-track { background: #f3f1ed; border-radius: 5px; }
.asset-panel .asset-grid::-webkit-scrollbar-thumb { background: #c9c4bc; border: 2px solid #f3f1ed; border-radius: 5px; }
.asset-panel .asset-grid::-webkit-scrollbar-thumb:hover { background: #aaa49c; }

.empty-assets { color: #9c978f; text-align: center; font-size: 12px; padding: 28px 4px; }
.asset-panel .empty-assets { grid-column: 1 / -1; grid-row: 3; align-self: center; z-index: 1; padding: 2px; pointer-events: none; }
.empty-assets.hidden { display: none; }
.empty-stack { width: 44px; height: 38px; position: relative; margin: 0 auto 12px; }
.empty-stack span { width: 29px; height: 29px; border: 1px solid #cdc9c2; background: #f7f5f2; display: block; position: absolute; left: 8px; top: 5px; }
.empty-stack span:nth-child(1) { transform: rotate(-10deg); }
.empty-stack span:nth-child(2) { transform: rotate(8deg); }
.empty-stack span:nth-child(3) { transform: rotate(0); background: #fff; }

.canvas-area { --tile-size: min(var(--user-tile-size), clamp(44px, 6.2vh, 68px)); padding: 12px clamp(18px, 2.5vw, 38px); min-width: 0; min-height: 0; overflow: hidden; display: flex; flex-direction: column; }
.project-heading { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 10px; }
.project-heading, .canvas-footer { flex: 0 0 auto; }
.canvas-heading-actions { display: flex; align-items: center; gap: 4px; }
.title-block { min-width: 0; }
.project-title, .project-subtitle { display: block; width: min(100%, 560px); padding: 0; border: 0; background: transparent; outline: 0; color: var(--ink); }
.project-title { font-size: clamp(22px, 2.3vw, 30px); line-height: 1.15; font-weight: 800; }
.title-underline { width: 38px; height: 3px; background: var(--accent); margin: 6px 0; }
.project-subtitle { color: var(--muted); font-size: 13px; }
.mobile-settings { display: none; }
.compact-board .canvas-area { --tile-size: min(var(--user-tile-size), 52px); --label-height: 21px; padding-top: 8px; padding-bottom: 8px; }
.compact-board .project-heading { margin-bottom: 12px; }
.compact-board .project-title { font-size: 24px; }
.compact-board .title-underline { height: 3px; margin: 6px 0; }
.compact-board .tier-board { min-height: 0; }
.compact-board .tier-row { grid-template-columns: 92px 1fr 36px; }
.compact-board .tier-name { font-size: 16px; }
.compact-board .canvas-footer { margin-top: 8px; }

.show-assets-button { display: none; position: fixed; z-index: 45; left: 20px; bottom: 18px; min-height: 42px; padding: 0 14px; border: 1px solid #d3cfc8; border-radius: 7px; background: #fff; color: #38342f; box-shadow: 0 8px 26px rgba(35,31,27,.16); cursor: pointer; align-items: center; gap: 8px; font: 600 12px "DM Sans", "Noto Sans TC", sans-serif; }
.show-assets-button:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.show-assets-button svg { width: 17px; }
.show-assets-button span { min-width: 22px; height: 22px; padding: 0 6px; border-radius: 11px; background: #eeece8; color: #656059; display: grid; place-items: center; font-size: 10px; }
.asset-panel-hidden .show-assets-button { display: inline-flex; }
.focus-mode .show-assets-button { display: none; }

.board-frame {
  --board-bg: #fff;
  --board-ink: #171717;
  --board-line: #dedbd6;
  background: var(--board-bg);
  color: var(--board-ink);
  border: 1px solid #d7d3cd;
  box-shadow: 0 12px 36px rgba(38, 33, 27, .06);
  width: 100%;
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}
.board-frame::-webkit-scrollbar { width: 9px; height: 9px; }
.board-frame::-webkit-scrollbar-track { background: color-mix(in srgb, var(--board-bg) 88%, #aaa); }
.board-frame::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--board-ink) 28%, transparent); border: 2px solid var(--board-bg); border-radius: 5px; }
.board-frame.export-render { flex: none; min-height: auto; overflow: visible; }
.board-frame::before { content: ""; position: absolute; inset: 0; z-index: 0; background-image: var(--board-background-image, none); background-size: cover; background-position: center; opacity: 0; pointer-events: none; }
.board-frame.has-background::before { opacity: var(--background-opacity, .32); }
.board-frame > * { position: relative; z-index: 1; }
.board-frame.has-background .tier-row { background: color-mix(in srgb, var(--board-bg) 72%, transparent); }
.board-frame.has-background .export-header { background: color-mix(in srgb, var(--board-bg) 82%, transparent); }

.board-frame[data-theme="ink"] { --board-bg: #242424; --board-ink: #f6f4ef; --board-line: #464646; border-color: #181818; }
.board-frame[data-theme="paper"] { --board-bg: #f3ebdb; --board-ink: #332f2a; --board-line: #cfc4b2; border-color: #cfc4b2; }

.export-header { display: none; padding: 26px 28px 20px; justify-content: space-between; align-items: flex-start; border-bottom: 1px solid var(--board-line); }
.export-header h1 { margin: 0; font-size: 28px; letter-spacing: 0; }
.export-header p { margin: 6px 0 0; color: color-mix(in srgb, var(--board-ink) 60%, transparent); font-size: 12px; }
.export-brand { display: flex; align-items: center; gap: 7px; font-weight: 700; font-size: 12px; opacity: .65; }
.mini-mark { width: 13px; height: 13px; display: block; background: linear-gradient(to bottom, #e9512c 0 28%, transparent 28% 36%, #e8b946 36% 64%, transparent 64% 72%, #56846b 72%); }

.tier-board { min-height: 0; }
.tier-row {
  min-height: calc(var(--tile-size) + 20px);
  display: grid;
  grid-template-columns: 112px 1fr 40px;
  border-bottom: 1px solid var(--board-line);
  background: var(--board-bg);
  transition: opacity 120ms ease;
}
.tier-row:last-child { border-bottom: 0; }
.tier-row.row-dragging { opacity: .45; }
.tier-row.tier-hidden { opacity: .55; }
.tier-row.tier-hidden .tier-items::before {
  content: "輸出時隱藏";
  position: absolute;
  right: 9px;
  bottom: 7px;
  padding: 3px 6px;
  border-radius: 3px;
  background: color-mix(in srgb, var(--board-ink) 10%, var(--board-bg));
  color: color-mix(in srgb, var(--board-ink) 60%, transparent);
  font-size: 9px;
  font-weight: 600;
}

.tier-label-wrap { display: grid; grid-template-columns: 24px 1fr; background: var(--tier-color); min-width: 0; }
.row-handle { cursor: grab; display: grid; place-items: center; color: rgba(0, 0, 0, .36); }
.row-handle:active { cursor: grabbing; }
.row-handle svg { width: 15px; }
.tier-name {
  width: 100%;
  min-width: 0;
  border: 0;
  background: transparent;
  text-align: center;
  padding: 10px 6px 10px 0;
  color: #211f1d;
  font-size: 20px;
  font-weight: 800;
  outline: 0;
}
.tier-name:focus { background: rgba(255, 255, 255, .22); }

.tier-items { min-width: 0; min-height: 100%; padding: 10px; display: flex; align-items: flex-start; align-content: flex-start; flex-wrap: wrap; gap: 8px; position: relative; }
.tier-items:empty::after { content: "拖曳圖片到這裡"; align-self: center; margin: auto; color: color-mix(in srgb, var(--board-ink) 32%, transparent); font-size: 12px; }
.export-render .tier-items:empty::after { display: none; }
.tier-items.dragover, .asset-grid.dragover { outline: 2px solid var(--accent); outline-offset: -3px; background: color-mix(in srgb, var(--accent) 6%, transparent); }

.tier-actions { display: flex; flex-direction: column; align-items: center; justify-content: center; border-left: 1px solid var(--board-line); gap: 2px; }
.tier-action { width: 30px; height: 30px; border: 0; border-radius: 5px; background: transparent; cursor: pointer; color: color-mix(in srgb, var(--board-ink) 52%, transparent); display: grid; place-items: center; position: relative; }
.tier-action:hover { background: color-mix(in srgb, var(--board-ink) 8%, transparent); color: var(--board-ink); }
.tier-action svg { width: 15px; }
.color-input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

.asset-card {
  width: var(--tile-size);
  flex: 0 0 var(--tile-size);
  cursor: grab;
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  background: #efede9;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .1);
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
}
.asset-panel .asset-card { width: 100%; height: auto; aspect-ratio: 1; flex-basis: auto; }
.asset-card:active { cursor: grabbing; }
.asset-card.dragging { opacity: .35; }
.asset-card.asset-hidden { opacity: .5; }
.touch-drag-proxy {
  position: fixed;
  z-index: 120;
  width: var(--tile-size);
  pointer-events: none;
  opacity: .92;
  transform: translate(-50%, -50%) rotate(2deg) scale(1.05);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .28);
}
.touch-drag-active, .touch-drag-active * { cursor: grabbing !important; }
.asset-image { display: block; width: 100%; height: var(--tile-size); object-fit: cover; pointer-events: none; background: #ebe8e3; }
.asset-panel .asset-image { position: absolute; inset: 0; height: 100%; aspect-ratio: 1; object-fit: cover !important; object-position: center; }
[data-ratio="portrait"] .asset-image { height: calc(var(--tile-size) * 1.28); }
[data-ratio="original"] .asset-image { height: var(--tile-size); object-fit: contain; }
.asset-name { display: block; height: var(--label-height); line-height: var(--label-height); padding: 0 6px; border: 0; outline: 0; width: 100%; background: color-mix(in srgb, var(--board-bg, #fff) 92%, #ddd); color: var(--board-ink, #171717); font-size: 10px; text-align: center; text-overflow: ellipsis; white-space: nowrap; overflow: hidden; }
.asset-panel .asset-name { position: absolute; z-index: 2; left: 0; right: 0; bottom: 0; background: linear-gradient(transparent, rgba(0, 0, 0, .76)); color: #fff; text-shadow: 0 1px 2px rgba(0,0,0,.55); }
.hide-labels .asset-name { display: none; }
.asset-remove { position: absolute; z-index: 3; top: 4px; right: 4px; width: 22px; height: 22px; border: 0; border-radius: 50%; background: rgba(12, 12, 12, .72); color: #fff; cursor: pointer; opacity: 0; display: grid; place-items: center; transition: opacity 120ms ease; }
.asset-edit { position: absolute; z-index: 3; top: 4px; left: 4px; width: 22px; height: 22px; border: 0; border-radius: 50%; background: rgba(12, 12, 12, .72); color: #fff; cursor: pointer; opacity: 0; display: grid; place-items: center; transition: opacity 120ms ease; }
.asset-card:hover .asset-remove, .asset-card:hover .asset-edit { opacity: 1; }
.asset-remove svg { width: 12px; }
.asset-edit svg { width: 12px; }
.asset-visibility { position: absolute; z-index: 3; right: 4px; bottom: calc(var(--label-height) + 4px); width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; background: rgba(12, 12, 12, .72); color: #fff; }
.asset-visibility svg { width: 11px; }

.canvas-footer { margin-top: 8px; display: flex; align-items: center; justify-content: space-between; }
.canvas-footer > span { display: flex; align-items: center; gap: 3px; color: var(--muted); font-size: 11px; }
.canvas-footer > span svg { width: 14px; }

.setting-group { margin-bottom: 14px; }
.setting-group > label { display: flex; justify-content: space-between; margin-bottom: 10px; color: #46423d; font-size: 12px; font-weight: 600; }
.setting-group output { color: var(--muted); font-weight: 400; }
.segmented-control { padding: 3px; background: #efede9; border-radius: 6px; display: grid; grid-template-columns: repeat(3, 1fr); }
.segmented-control button { height: 31px; border: 0; border-radius: 4px; background: transparent; color: #6f6b65; cursor: pointer; font-size: 11px; }
.segmented-control button.active { background: #fff; color: #26231f; font-weight: 600; box-shadow: 0 1px 4px rgba(0, 0, 0, .08); }

input[type="range"] { width: 100%; accent-color: var(--accent); }
.theme-options { display: flex; gap: 9px; }
.theme-swatch { width: 54px; height: 42px; border: 2px solid transparent; background: transparent; padding: 3px; border-radius: 6px; cursor: pointer; position: relative; }
.theme-swatch.active { border-color: var(--accent); }
.theme-preview { display: block; width: 100%; height: 100%; border: 1px solid #d5d1cb; border-radius: 3px; }
.theme-light { background: linear-gradient(90deg, #ef6b50 0 25%, #fff 25%); }
.theme-ink { background: linear-gradient(90deg, #d6a348 0 25%, #252525 25%); }
.theme-paper { background: linear-gradient(90deg, #70a182 0 25%, #f3ebdb 25%); }

.background-upload { min-height: 58px; padding: 7px; border: 1px solid var(--line); border-radius: 6px; display: flex !important; align-items: center; justify-content: flex-start !important; gap: 10px; cursor: pointer; background: #faf9f7; }
.background-upload:hover { border-color: #aaa49c; background: #fff; }
.background-preview { width: 48px; height: 42px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 4px; background: #ebe8e3 center / cover no-repeat; color: #77716a; }
.background-preview svg { width: 18px; }
.background-upload > span:last-of-type { min-width: 0; }
.background-upload strong, .background-upload small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.background-upload strong { max-width: 150px; color: #46423d; font-size: 11px; }
.background-upload small { margin-top: 3px; color: var(--muted); font-size: 9px; font-weight: 400; }
.background-opacity { margin-top: 12px; }
.background-opacity > label { display: flex; justify-content: space-between; color: #46423d; font-size: 10px; font-weight: 600; }
.background-opacity output { color: var(--muted); font-weight: 400; }
.remove-background { margin-top: 7px; color: #a43a2c; }

.exit-focus-button { display: none; position: fixed; z-index: 90; top: 16px; right: 16px; min-height: 40px; padding: 0 14px; border: 1px solid rgba(255,255,255,.2); border-radius: 7px; background: rgba(18,18,18,.82); color: #fff; backdrop-filter: blur(8px); cursor: pointer; align-items: center; gap: 7px; font: 600 12px "DM Sans", "Noto Sans TC", sans-serif; box-shadow: 0 8px 24px rgba(0,0,0,.22); }
.exit-focus-button:hover { background: #fff; color: #171717; }
.exit-focus-button svg { width: 16px; }
.focus-mode .exit-focus-button { display: inline-flex; }

.toggle-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.toggle-row strong, .toggle-row span { display: block; }
.toggle-row strong { font-size: 12px; }
.toggle-row > div > span { margin-top: 3px; color: var(--muted); font-size: 10px; }
.toggle-row.compact { min-height: 34px; }
.visibility-settings > label { margin-bottom: 5px; }
.visibility-settings .toggle-row + .toggle-row { border-top: 1px solid #eeece8; }
.switch { display: block; position: relative; width: 38px; height: 22px; flex: 0 0 auto; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch > span { position: absolute; inset: 0; cursor: pointer; background: #ccc8c1; border-radius: 11px; transition: 160ms; }
.switch > span::before { content: ""; position: absolute; width: 16px; height: 16px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: 160ms; box-shadow: 0 1px 2px rgba(0,0,0,.22); }
.switch input:checked + span { background: var(--green); }
.switch input:checked + span::before { transform: translateX(16px); }
.divider { height: 1px; background: var(--line); margin: 2px 0 20px; }
.close-settings { display: none; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 80;
  transform: translate(-50%, 20px);
  opacity: 0;
  pointer-events: none;
  background: #171717;
  color: #fff;
  min-height: 42px;
  padding: 0 15px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  box-shadow: 0 8px 28px rgba(0,0,0,.2);
  transition: 200ms ease;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }
.toast svg { width: 17px; color: #79bd91; }

.modal-backdrop { position: fixed; inset: 0; z-index: 100; background: rgba(10, 10, 10, .52); display: grid; place-items: center; padding: 20px; }
.modal-backdrop[hidden] { display: none; }
.modal { width: min(100%, 380px); background: #fff; border-radius: 8px; padding: 28px; text-align: center; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.modal-icon { width: 44px; height: 44px; display: grid; place-items: center; margin: 0 auto 14px; border-radius: 50%; background: #f9e9e5; color: #b63d2b; }
.modal-icon svg { width: 21px; }
.modal h2 { font-size: 20px; margin: 0 0 8px; }
.modal p { margin: 0; color: var(--muted); font-size: 13px; }
.modal-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin-top: 24px; }

.image-editor { width: min(100%, 760px); padding: 24px; text-align: left; }
.editor-heading { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; }
.editor-heading h2 { margin: 2px 0 0; font-size: 20px; }
.editor-heading .icon-button:hover { background: #efede9; }
.editor-layout { display: grid; grid-template-columns: minmax(220px, .86fr) minmax(270px, 1.14fr); gap: 24px; }
.editor-preview { min-height: 300px; max-height: 410px; background: #eeece8; border: 1px solid #dedbd5; display: grid; place-items: center; overflow: hidden; }
.editor-preview img { width: 100%; height: 100%; min-height: 300px; object-fit: cover; object-position: center; }
.editor-controls { min-width: 0; }
.field-group { margin-bottom: 16px; }
.field-group > label { display: block; margin-bottom: 7px; color: #504b45; font-size: 11px; font-weight: 600; }
.field-group input, .field-group select {
  width: 100%;
  height: 38px;
  padding: 0 10px;
  border: 1px solid #d9d5cf;
  border-radius: 5px;
  background: #fff;
  color: #292622;
  outline: none;
  font-size: 12px;
}
.field-group input:focus, .field-group select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(233, 81, 44, .1); }
.position-picker { width: 116px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; padding: 5px; border: 1px solid #d9d5cf; background: #f7f5f2; border-radius: 6px; }
.position-picker button { aspect-ratio: 1; border: 0; border-radius: 3px; background: transparent; cursor: pointer; position: relative; display: grid; place-items: center; }
.position-picker button:hover { background: #ebe7e1; }
.position-picker button.active { background: #272522; }
.position-picker span { width: 6px; height: 6px; border-radius: 50%; background: #aaa49c; }
.position-picker button.active span { background: #fff; }
.editor-visibility { padding-top: 8px; border-top: 1px solid #e7e3de; }
.editor-actions { display: grid; grid-template-columns: auto 1fr auto auto; gap: 9px; margin-top: 22px; padding-top: 18px; border-top: 1px solid #e4e1dc; }

@media (max-width: 820px) {
  .workspace { grid-template-columns: minmax(0, 1fr); }
  .settings-panel { position: fixed; z-index: 50; top: 68px; right: 0; bottom: 0; width: 280px; transform: translateX(100%); box-shadow: -12px 0 30px rgba(0,0,0,.12); transition: transform 180ms ease; }
  .settings-panel.open { transform: translateX(0); }
  .mobile-settings, .close-settings { display: inline-flex; }
}

@media (max-width: 760px) {
  .topbar { height: 60px; padding: 0 14px; }
  .brand { font-size: 16px; }
  .brand > span:last-child, .save-status { display: none; }
  .topbar-actions { gap: 4px; }
  .button-primary { padding: 0 11px; }
  .workspace { display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) clamp(170px, var(--asset-panel-height), 55vh); height: calc(100dvh - 60px); min-height: 0; }
  .asset-panel { display: grid; grid-template-columns: 82px minmax(0, 1fr) minmax(0, 1fr); grid-template-rows: auto auto minmax(0, 1fr); border: 0; border-top: 1px solid var(--line); padding: 8px; gap: 6px 8px; }
  .asset-panel .panel-heading { margin: 0; }
  .asset-panel .panel-heading h2 { font-size: 14px; }
  .asset-panel .eyebrow { display: none; }
  .asset-panel-heading-actions { gap: 2px; }
  .asset-panel .count-badge { min-width: 22px; height: 22px; }
  .asset-panel .panel-hide-button { width: 30px; height: 30px; }
  .asset-panel .upload-zone { min-height: 38px; padding: 3px 7px; }
  .asset-panel .upload-zone .upload-icon { width: 28px; height: 28px; }
  .asset-panel .upload-zone strong { font-size: 11px; }
  .asset-panel .folder-upload { min-height: 38px; margin: 0; font-size: 10px; }
  .asset-panel .format-hint { display: none; }
  .asset-panel .asset-toolbar { margin: 0; padding-top: 4px; }
  .asset-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .asset-panel .asset-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); height: 100%; max-height: none; }
  .show-assets-button { left: 12px; bottom: 12px; }
  .canvas-area { padding: 8px 10px; }
  .project-heading { margin-bottom: 6px; }
  .project-title { font-size: 21px; }
  .project-subtitle { font-size: 11px; }
  .compact-board .project-title { font-size: 21px; }
  .tier-row { grid-template-columns: 83px minmax(0, 1fr) 34px; }
  .tier-label-wrap { grid-template-columns: 17px 1fr; }
  .tier-name { font-size: 15px; padding-right: 2px; }
  .tier-actions { gap: 5px; }
  .tier-action { width: 26px; height: 26px; }
  .tier-items { padding: 8px; gap: 6px; }
  .canvas-footer > span { display: none; }
  .settings-panel { top: 60px; width: min(88vw, 300px); }
  .focus-mode .workspace { display: block; }
  .focus-mode .canvas-area { padding: 0; }
  .image-editor { max-height: calc(100vh - 24px); overflow-y: auto; padding: 18px; }
  .editor-layout { grid-template-columns: 1fr; gap: 17px; }
  .editor-preview { min-height: 210px; max-height: 260px; }
  .editor-preview img { min-height: 210px; }
  .editor-actions { grid-template-columns: 1fr 1fr; }
  .editor-actions > span { display: none; }
  .editor-actions .button { width: 100%; }
  .asset-edit, .asset-remove { opacity: .82; }
}

@media (max-width: 430px) {
  :root { --tile-size: 68px; }
  .topbar .button-primary { font-size: 0; width: 40px; padding: 0; }
  .topbar .button-primary svg { margin: 0; }
  .asset-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .tier-row { grid-template-columns: 72px minmax(0, 1fr) 32px; }
  .tier-name { font-size: 13px; }
}

@media print {
  body { background: #fff; }
  .topbar, .asset-panel, .settings-panel, .project-heading, .canvas-footer { display: none !important; }
  .workspace { display: block; }
  .canvas-area { padding: 0; }
  .board-frame { border: 0; box-shadow: none; }
  .export-header { display: flex; }
  .tier-actions, .row-handle { display: none; }
  .tier-row { grid-template-columns: 112px 1fr; }
  .tier-label-wrap { grid-template-columns: 1fr; }
}