:root {
  --territory-blue: #c2dcfb;
  --territory-red: #fbccd3;
  --territory-coral: #fbc3b9;
  --territory-yellow: #fbe7bc;
  --territory-green: #c4e6cb;
  --territory-cyan: #b3e8f6;
  --territory-purple: #dfd8f8;
  --territory-pink: #ffeef8;
  --ink: #223127;
  --muted: #5f6c62;
  --line: #d5ddd4;
  --surface: #fffdf8;
  --page: linear-gradient(180deg, #f0f5ec 0%, #e7efe6 100%);
  --accent: #f0642b;
  --accent-deep: #c74e20;
  --forest: #2f6f58;
  --forest-soft: #dcebe2;
  --canvas-bg: #d9e2d6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--page);
}

button,
input,
select {
  font: inherit;
}

button {
  transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease;
}

button:hover {
  transform: translateY(-1px);
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
  min-height: 100vh;
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 24px;
  overflow: auto;
  background: rgba(255, 253, 248, 0.96);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  display: grid;
  gap: 12px;
}

.brand img {
  display: block;
  max-width: 210px;
  height: auto;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 28px;
  line-height: 1.15;
}

h2 {
  font-size: 16px;
  line-height: 1.2;
}

p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.panel {
  display: grid;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.field {
  display: grid;
  gap: 7px;
  color: #3d493f;
  font-size: 14px;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  color: var(--ink);
  background: #fbfcf8;
  border: 1px solid #ccd5cb;
  border-radius: 10px;
}

input[type="text"][disabled] {
  color: #627268;
  background: #eef3ec;
}

input[type="color"],
input[type="file"] {
  width: 100%;
  min-height: 42px;
  padding: 6px;
  background: #fbfcf8;
  border: 1px solid #ccd5cb;
  border-radius: 10px;
}

input[type="file"] {
  padding: 9px 10px;
}

.grid-controls,
.toggle-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.toggle-row[aria-label="背景模式"] {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.action-stack,
.export-stack,
.tool-row {
  display: grid;
  gap: 8px;
}

.palette {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.color-swatch {
  position: relative;
  aspect-ratio: 1;
  min-width: 0;
  border: 2px solid transparent;
  border-radius: 10px;
  cursor: pointer;
}

.color-swatch.active {
  border-color: #1f2921;
}

.color-swatch span {
  position: absolute;
  inset: auto 5px 5px;
  overflow: hidden;
  color: #202020;
  font-size: 11px;
  line-height: 1.15;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.custom-color {
  margin-top: 2px;
}

.tool-button,
.secondary-button,
.primary-button,
.toggle-button {
  min-height: 42px;
  border-radius: 10px;
  cursor: pointer;
}

.tool-button,
.secondary-button,
.toggle-button {
  color: var(--ink);
  background: #f8faf5;
  border: 1px solid #cdd5cc;
}

.tool-button.active,
.toggle-button.active {
  color: #ffffff;
  background: var(--forest);
  border-color: var(--forest);
}

.primary-button {
  color: #ffffff;
  background: var(--accent);
  border: 1px solid var(--accent);
  font-weight: 700;
}

.primary-button.alt {
  background: var(--accent-deep);
  border-color: var(--accent-deep);
}

.hint {
  font-size: 12px;
}

.workspace {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-width: 0;
  padding: 24px;
}

.workspace-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
}

.status {
  padding: 8px 11px;
  color: #1f5f49;
  background: var(--forest-soft);
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
}

.status.error {
  color: #8c2a2a;
  background: #f7dada;
}

.canvas-wrap {
  display: grid;
  place-items: start center;
  min-height: 0;
  overflow: auto;
  padding: 20px;
  background: var(--canvas-bg);
  border: 1px solid #c8d2c6;
  border-radius: 16px;
}

canvas {
  display: block;
  width: min(100%, 780px);
  height: auto;
  background: #ffffff;
  border-radius: 18px;
  box-shadow: 0 18px 40px rgba(24, 35, 24, 0.16);
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .toolbar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .workspace,
  .toolbar {
    padding: 18px;
  }

  .grid-controls,
  .toggle-row,
  .toggle-row[aria-label="背景模式"] {
    grid-template-columns: 1fr;
  }
}