:root {
  color-scheme: dark;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --bg: #0c0d11;
  --panel: #14161c;
  --panel-2: #1a1d24;
  --panel-3: #20242d;
  --border: #2a2f3a;
  --border-soft: #232730;
  --text: #f5f7fb;
  --muted: #959dac;
  --muted-2: #697181;
  --accent: #ffb547;
  --accent-2: #ff8f3d;
  --danger: #ff6a71;
  --success: #67d49a;
  --shadow: 0 22px 70px rgba(0,0,0,.34);
}

* { box-sizing: border-box; }
html, body, #root { min-height: 100%; margin: 0; }
body {
  background:
    radial-gradient(circle at 22% -10%, rgba(255,181,71,.08), transparent 34%),
    radial-gradient(circle at 95% 8%, rgba(93,112,255,.07), transparent 28%),
    var(--bg);
  color: var(--text);
  overflow-x: hidden;
}
button, input, select { font: inherit; }
button { color: inherit; }

.app-shell { min-height: 100vh; }
.topbar {
  height: 74px;
  padding: 0 22px;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(13,14,18,.86);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 30;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #2a1602;
  box-shadow: 0 8px 24px rgba(255,151,52,.2);
}
.brand h1 { font-size: 17px; line-height: 1.1; margin: 0 0 5px; letter-spacing: .02em; }
.brand p { font-size: 12px; color: var(--muted); margin: 0; }
.top-actions { display: flex; gap: 9px; }
.ghost-button {
  border: 1px solid var(--border);
  background: var(--panel-2);
  padding: 9px 13px;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  font-size: 12px;
  transition: .18s ease;
}
.ghost-button:hover { border-color: #454c5b; transform: translateY(-1px); }

.workspace {
  min-height: calc(100vh - 74px);
  display: grid;
  grid-template-columns: 286px minmax(420px, 1fr) 326px;
}
.sidebar {
  background: rgba(20,22,28,.91);
  border-right: 1px solid var(--border-soft);
  min-width: 0;
}
.right-sidebar { border-right: 0; border-left: 1px solid var(--border-soft); }
.panel-section { border-bottom: 1px solid var(--border-soft); }
.section-title {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 15px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: #dfe3eb;
}
.section-title > span { display: flex; gap: 9px; align-items: center; font-size: 13px; font-weight: 650; }
.section-title > svg { color: var(--muted-2); transition: transform .2s; }
.panel-section.is-open .section-title > svg { transform: rotate(180deg); }
.section-body { padding: 1px 16px 17px; display: grid; gap: 13px; }

.drop-zone {
  min-height: 140px;
  border: 1px dashed #3a414e;
  border-radius: 13px;
  background: linear-gradient(145deg, rgba(255,255,255,.025), rgba(255,255,255,.008));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 17px;
  cursor: pointer;
  transition: .2s ease;
}
.drop-zone:hover, .drop-zone.dragging { border-color: var(--accent); background: rgba(255,181,71,.055); }
.drop-icon {
  width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center;
  background: #222630;
  color: var(--accent);
  margin-bottom: 10px;
}
.drop-zone strong { font-size: 13px; margin-bottom: 5px; }
.drop-zone > span { font-size: 11px; color: var(--muted); }
.drop-zone small { display: flex; align-items: center; gap: 5px; color: var(--muted-2); margin-top: 10px; font-size: 10px; }
.file-card {
  display: flex; align-items: center; gap: 9px;
  min-width: 0;
  padding: 10px;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border-soft);
}
.file-card > svg { color: var(--accent); flex: 0 0 auto; }
.file-card div { min-width: 0; flex: 1; }
.file-card strong, .file-card span { display: block; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.file-card strong { font-size: 11px; font-weight: 600; }
.file-card span { font-size: 10px; color: var(--muted); margin-top: 3px; }
.file-card button { border: 0; background: transparent; color: var(--muted); cursor: pointer; padding: 4px; }
.file-card button:hover { color: var(--danger); }
.mini-note { display: flex; gap: 7px; align-items: center; font-size: 10px; color: #8ea7a0; }

.preset-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.preset-grid button {
  min-height: 64px;
  border: 1px solid var(--border-soft);
  background: var(--panel-2);
  border-radius: 10px;
  padding: 8px;
  cursor: pointer;
  text-align: left;
  transition: .18s;
}
.preset-grid button:hover { transform: translateY(-1px); border-color: #454d5c; }
.preset-grid strong { display: block; font-size: 10px; margin-top: 6px; }
.preset-swatch { display: block; height: 24px; border-radius: 7px; }
.preset-classic { background: radial-gradient(circle at 15% 50%, #111 0 12%, transparent 13%), radial-gradient(circle at 45% 50%, #111 0 25%, transparent 26%), radial-gradient(circle at 80% 50%, #111 0 40%, transparent 41%), #efefef; }
.preset-comic { background: radial-gradient(circle, #21180f 0 1.5px, transparent 2px) 0 0 / 7px 7px, #f6e8cf; }
.preset-tech { background: linear-gradient(135deg, #091326, #19143c); position: relative; box-shadow: inset 0 0 0 1px rgba(62,218,255,.25); }
.preset-pixel { background: linear-gradient(90deg,#ff7759 0 25%,#ffd56b 25% 50%,#5ad6bf 50% 75%,#5c74e8 75%); image-rendering: pixelated; }
.preset-organic { background: radial-gradient(circle at 15% 30%, #49362c 0 7%, transparent 8%), radial-gradient(circle at 42% 70%, #49362c 0 10%, transparent 11%), radial-gradient(circle at 77% 35%, #49362c 0 5%, transparent 6%), #eee0cc; }
.preset-star { background: linear-gradient(135deg,#ffe98a,#ff8b3d); clip-path: polygon(0 0,100% 0,100% 100%,0 100%); }

.select-field { display: grid; gap: 7px; font-size: 11px; color: var(--muted); }
select, .number-input-wrap, .color-field > span:last-child {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
select { color: var(--text); padding: 9px 10px; outline: none; width: 100%; }
.dimension-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.number-field { display: grid; gap: 6px; font-size: 10px; color: var(--muted); }
.number-input-wrap { display: flex; align-items: center; overflow: hidden; }
.number-input-wrap input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); padding: 8px 7px; }
.number-input-wrap em { font-style: normal; color: var(--muted-2); font-size: 9px; padding-right: 7px; }
.cell-count { border-radius: 8px; padding: 9px 10px; font-size: 10px; color: var(--muted); background: #101218; display: flex; gap: 6px; align-items: center; }
.cell-count.warning { color: #ffcc72; background: rgba(255,167,47,.08); }

.preview-area {
  min-width: 0;
  padding: 18px;
  display: grid;
  grid-template-rows: auto minmax(320px, 1fr) auto;
  gap: 12px;
  background: linear-gradient(180deg, rgba(255,255,255,.01), transparent 38%);
}
.preview-toolbar, .export-bar {
  min-height: 54px;
  border: 1px solid var(--border-soft);
  background: rgba(20,22,28,.82);
  border-radius: 12px;
  padding: 11px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 10px 35px rgba(0,0,0,.12);
}
.preview-toolbar div, .export-bar > div:first-child { display: grid; gap: 4px; }
.preview-toolbar strong, .export-bar strong { font-size: 12px; }
.preview-toolbar span, .export-bar span { color: var(--muted); font-size: 10px; }
.privacy-badge { display: inline-flex !important; flex-direction: row !important; align-items: center; gap: 5px !important; color: #77bea0 !important; background: rgba(72,181,130,.08); border: 1px solid rgba(72,181,130,.14); padding: 6px 9px; border-radius: 999px; }
.canvas-stage {
  min-height: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  overflow: hidden;
  padding: 24px;
  background-color: #101218;
  background-image: linear-gradient(45deg,#171a21 25%,transparent 25%),linear-gradient(-45deg,#171a21 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#171a21 75%),linear-gradient(-45deg,transparent 75%,#171a21 75%);
  background-size: 20px 20px;
  background-position: 0 0,0 10px,10px -10px,-10px 0;
}
.canvas-frame {
  max-width: 100%;
  max-height: calc(100vh - 240px);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
  background: transparent;
}
.canvas-frame canvas { display: block; width: 100%; height: 100%; object-fit: contain; max-height: calc(100vh - 240px); }
.toast-message {
  position: fixed;
  z-index: 60;
  left: 50%; bottom: 87px;
  transform: translateX(-50%);
  max-width: min(520px, calc(100vw - 40px));
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #173025;
  color: #b9f4d1;
  box-shadow: 0 20px 55px rgba(0,0,0,.34);
  border: 1px solid rgba(112,219,157,.18);
  font-size: 11px;
}
.toast-message.error { background: #341b20; color: #ffb1b7; border-color: rgba(255,106,113,.2); }
.toast-message span { flex: 1; }
.toast-message button { border: 0; background: transparent; color: inherit; cursor: pointer; font-size: 18px; }
.export-actions { display: flex; gap: 7px; }
.export-actions button, .custom-shape-box button {
  border: 1px solid #d58825;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #2e1903;
  border-radius: 8px;
  padding: 9px 12px;
  font-weight: 700;
  font-size: 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.export-actions button.secondary { background: var(--panel-3); color: var(--text); border-color: var(--border); font-weight: 600; }
.export-actions button:disabled { opacity: .5; cursor: wait; }

.shape-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 7px; }
.shape-grid button {
  min-height: 59px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 9px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 5px;
  color: var(--muted);
  cursor: pointer;
  transition: .16s;
}
.shape-grid button span { font-size: 9px; }
.shape-grid button:hover { color: var(--text); border-color: #4b5362; }
.shape-grid button.active { color: var(--accent); border-color: rgba(255,181,71,.65); background: rgba(255,181,71,.08); }
.custom-shape-box { border: 1px solid var(--border-soft); border-radius: 10px; padding: 10px; display: grid; gap: 7px; background: #111319; }
.custom-shape-box button { justify-self: start; padding: 8px 10px; }
.custom-shape-box > span { font-size: 10px; color: var(--text); word-break: break-all; }
.custom-shape-box small { color: var(--muted); font-size: 9px; line-height: 1.5; }

.control-row { display: grid; gap: 7px; }
.control-heading { display: flex; align-items: center; justify-content: space-between; font-size: 10px; color: var(--muted); }
.value-box { color: #dfe3eb; font-variant-numeric: tabular-nums; }
.control-row small { font-size: 9px; color: var(--muted-2); line-height: 1.45; }
input[type="range"] {
  width: 100%;
  height: 4px;
  appearance: none;
  border-radius: 999px;
  background: linear-gradient(90deg, #4e5665, #303641);
  outline: 0;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent);
  border: 2px solid #2a1c08;
  box-shadow: 0 0 0 2px rgba(255,181,71,.14);
  cursor: pointer;
}
.segmented { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); border: 1px solid var(--border); border-radius: 9px; padding: 3px; background: #101218; gap: 3px; }
.segmented button { min-width: 0; border: 0; background: transparent; color: var(--muted); border-radius: 6px; padding: 7px 5px; font-size: 9px; cursor: pointer; display: inline-flex; justify-content: center; align-items: center; gap: 4px; }
.segmented button.active { background: var(--panel-3); color: var(--text); box-shadow: 0 2px 7px rgba(0,0,0,.18); }
.toggle-row { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; position: relative; cursor: pointer; }
.toggle-row > span { display: grid; gap: 3px; }
.toggle-row strong { font-size: 10px; font-weight: 550; }
.toggle-row small { font-size: 9px; color: var(--muted-2); line-height: 1.4; }
.toggle-row input { position: absolute; opacity: 0; pointer-events: none; }
.toggle-row i { width: 32px; height: 18px; border-radius: 999px; background: #353b47; position: relative; transition: .18s; }
.toggle-row i::after { content: ''; width: 14px; height: 14px; border-radius: 50%; background: #a8afbb; position: absolute; top: 2px; left: 2px; transition: .18s; }
.toggle-row input:checked + i { background: rgba(255,181,71,.75); }
.toggle-row input:checked + i::after { left: 16px; background: #2b1c08; }
.color-field { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-size: 10px; color: var(--muted); }
.color-field > span:last-child { display: flex; align-items: center; overflow: hidden; }
.color-field input[type="color"] { width: 31px; height: 28px; padding: 3px; border: 0; background: transparent; cursor: pointer; }
.color-field input[type="text"] { width: 68px; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 9px; padding: 0 5px; }
.seed-row { display: grid; grid-template-columns: 1fr 34px; align-items: end; gap: 7px; }
.seed-row > button { height: 34px; border: 1px solid var(--border); background: var(--panel-2); color: var(--muted); border-radius: 8px; cursor: pointer; display: grid; place-items: center; }
.info-block { padding: 10px; background: #101218; border: 1px solid var(--border-soft); border-radius: 9px; display: grid; gap: 5px; }
.info-block strong { font-size: 10px; }
.info-block span { font-size: 9px; color: var(--muted); }

@media (max-width: 1180px) {
  .workspace { grid-template-columns: 250px minmax(400px,1fr) 290px; }
  .preview-area { padding: 12px; }
  .shape-grid { grid-template-columns: repeat(3,1fr); }
}

@media (max-width: 930px) {
  .workspace { display: flex; flex-direction: column; }
  .preview-area { order: 1; min-height: 720px; }
  .left-sidebar { order: 2; }
  .right-sidebar { order: 3; }
  .sidebar { border: 0; border-top: 1px solid var(--border-soft); }
  .panel-section { max-width: 760px; margin: 0 auto; }
  .shape-grid { grid-template-columns: repeat(4,1fr); }
  .canvas-frame { max-height: 600px; }
  .canvas-frame canvas { max-height: 600px; }
}

@media (max-width: 620px) {
  .topbar { height: auto; min-height: 70px; padding: 12px; align-items: flex-start; gap: 8px; }
  .brand p { display: none; }
  .top-actions { gap: 5px; }
  .ghost-button { padding: 8px; font-size: 0; }
  .preview-area { padding: 8px; min-height: 610px; }
  .preview-toolbar, .export-bar { align-items: flex-start; gap: 10px; }
  .export-bar { flex-direction: column; }
  .export-actions { width: 100%; display: grid; grid-template-columns: 1fr 1fr 1fr; }
  .export-actions button { justify-content: center; padding: 9px 5px; }
  .canvas-stage { padding: 10px; }
  .shape-grid { grid-template-columns: repeat(4,1fr); }
}

/* 静态版补充样式 */
.section-title > i { color: var(--muted-2); transition: transform .2s; font-style: normal; }
.panel-section.is-open .section-title > i { transform: rotate(180deg); }
.section-title b { color: var(--accent); font-size: 13px; font-weight: 600; }
.card-icon { color: var(--accent); flex: 0 0 auto; }
.shape-symbol { font-size: 21px; line-height: 1; }
#gradientRows { display: grid; gap: 13px; }
#gradientRows[hidden] { display: none; }
[hidden] { display: none !important; }

/* 历史记录、撤回与标准预设 */
.ghost-button:disabled {
  opacity: .38;
  cursor: not-allowed;
  transform: none;
}
.ghost-button em {
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 999px;
  display: inline-grid;
  place-items: center;
  font-style: normal;
  font-size: 9px;
  color: #2a1602;
  background: var(--accent);
}
.preset-grid button { position: relative; }
.preset-grid button > small {
  position: absolute;
  top: 6px;
  right: 6px;
  padding: 2px 5px;
  border-radius: 999px;
  background: rgba(255,181,71,.13);
  color: var(--accent);
  font-size: 8px;
  line-height: 1.2;
}
.default-preset { border-color: rgba(255,181,71,.36) !important; }
.preset-standard {
  background:
    radial-gradient(circle, #111 0 8%, transparent 9%) 0 0 / 13px 13px,
    radial-gradient(circle, #111 0 18%, transparent 19%) 6.5px 6.5px / 13px 13px,
    #f7f7f4;
  transform: rotate(-4deg) scale(.98);
}

.history-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(4,5,8,.58);
  backdrop-filter: blur(4px);
}
.history-drawer {
  position: fixed;
  z-index: 81;
  top: 0;
  right: 0;
  width: min(390px, calc(100vw - 28px));
  height: 100vh;
  display: grid;
  grid-template-rows: auto auto minmax(0,1fr) auto auto;
  background: #15181f;
  border-left: 1px solid var(--border);
  box-shadow: -24px 0 70px rgba(0,0,0,.38);
}
.history-drawer-header {
  min-height: 75px;
  padding: 16px 16px 14px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-soft);
}
.history-drawer-header > div { display: grid; gap: 5px; }
.history-drawer-header strong { font-size: 15px; }
.history-drawer-header span { max-width: 290px; color: var(--muted); font-size: 10px; line-height: 1.55; }
.history-drawer-header button {
  width: 30px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--muted);
  cursor: pointer;
  font-size: 19px;
}
.history-search-wrap { padding: 12px 14px; border-bottom: 1px solid var(--border-soft); }
.history-search-wrap input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 9px;
  outline: none;
  padding: 10px 11px;
  background: #101218;
  color: var(--text);
  font-size: 11px;
}
.history-search-wrap input:focus { border-color: rgba(255,181,71,.7); box-shadow: 0 0 0 3px rgba(255,181,71,.08); }
.history-list {
  min-height: 0;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.history-item {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  padding: 10px 9px;
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  cursor: pointer;
  transition: .16s ease;
}
.history-item:hover { background: rgba(255,255,255,.035); border-color: var(--border-soft); }
.history-item.active { background: rgba(255,181,71,.08); border-color: rgba(255,181,71,.25); }
.history-marker { width: 16px; color: var(--muted-2); text-align: center; font-size: 10px; }
.history-item.active .history-marker { color: var(--accent); }
.history-item-body { min-width: 0; display: grid; gap: 4px; }
.history-item-body strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; font-weight: 620; }
.history-item-body small { color: var(--muted-2); font-size: 9px; }
.history-empty { margin: auto; padding: 40px 20px; color: var(--muted); text-align: center; font-size: 11px; }
.history-drawer-footer {
  padding: 12px 14px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.history-drawer-footer span { color: var(--muted); font-size: 9px; line-height: 1.5; }
.history-drawer-footer button {
  flex: 0 0 auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 9px;
  background: var(--panel-2);
  color: #ff9fa5;
  cursor: pointer;
  font-size: 9px;
}
.history-note { margin: 0; padding: 0 14px 14px; color: var(--muted-2); font-size: 8px; line-height: 1.5; }

@media (max-width: 1220px) {
  .top-actions .ghost-button span { display: none; }
  .top-actions { gap: 6px; }
  .ghost-button { padding: 9px 10px; }
}


.preset-manager-toolbar { display: grid; gap: 10px; }
.preset-group-actions, .preset-quick-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.ghost-chip { border: 1px solid var(--border); background: var(--panel-2); color: var(--text); border-radius: 9px; padding: 8px 10px; font-size: 10px; cursor: pointer; }
.ghost-chip:hover { border-color: #454c5b; }
.ghost-chip.accent { border-color: rgba(255,181,71,.38); background: rgba(255,181,71,.08); color: #ffd79c; }
.ghost-chip.danger { color: #ffb7bd; }
.my-preset-list { display: grid; gap: 9px; }
.my-preset-empty { border: 1px dashed #383e4b; border-radius: 10px; padding: 12px; color: var(--muted); font-size: 10px; text-align: center; background: rgba(255,255,255,.02); }
.my-preset-card { border: 1px solid var(--border-soft); border-radius: 11px; background: var(--panel-2); overflow: hidden; }
.my-preset-apply { width: 100%; border: 0; background: transparent; color: inherit; text-align: left; padding: 10px; cursor: pointer; display: grid; gap: 4px; }
.my-preset-apply:hover { background: rgba(255,255,255,.025); }
.my-preset-apply strong { font-size: 11px; }
.my-preset-meta { display: flex; gap: 6px; flex-wrap: wrap; color: var(--muted); font-size: 9px; }
.my-preset-actions { display: flex; gap: 8px; border-top: 1px solid var(--border-soft); padding: 8px 10px; }
.my-preset-actions button { border: 0; background: transparent; color: var(--muted); font-size: 10px; cursor: pointer; padding: 0; }
.my-preset-actions button:hover { color: var(--text); }
.my-preset-actions button.danger:hover { color: var(--danger); }