:root {
  color-scheme: light;
  --bg: #f6f7f4;
  --panel: #ffffff;
  --ink: #1d2424;
  --muted: #5f6b6b;
  --line: #d9dfdc;
  --accent: #1f7a5a;
  --accent-strong: #155f45;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input {
  font: inherit;
}

.app {
  min-height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.topbar h1 {
  margin: 0;
  font-size: 20px;
}

.topbar p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.file-button,
button {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 8px;
  padding: 10px 12px;
  min-height: 44px;
  cursor: pointer;
}

.file-button input {
  display: none;
}

.stage {
  position: relative;
  overflow: hidden;
  background: #222827;
  touch-action: none;
}

#editorCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.empty-state {
  position: absolute;
  inset: 18px;
  display: grid;
  place-content: center;
  gap: 8px;
  color: #eef4f1;
  text-align: center;
  pointer-events: none;
}

.empty-state span {
  color: #c8d3cf;
  font-size: 13px;
  line-height: 1.4;
}

.controls {
  display: grid;
  gap: 12px;
  padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.tool-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.tool-row button {
  font-size: 13px;
  padding-inline: 8px;
}

.history-group {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
}

.history-group button {
  min-width: 0;
  padding-inline: 0;
  font-size: 20px;
  line-height: 1;
}

.lasso-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.lasso-status {
  min-height: 20px;
  color: var(--muted);
  font-size: 13px;
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 34px;
  font-size: 14px;
  color: var(--muted);
}

.toggle-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

button.is-active {
  border-color: var(--accent);
  background: #e4f2ec;
  color: var(--accent-strong);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.area-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.area-item {
  display: grid;
  grid-template-columns: 1fr 34px;
  gap: 4px;
}

.area-item.is-active .area-chip {
  border-color: var(--accent);
  background: #e4f2ec;
  color: var(--accent-strong);
}

.area-chip {
  display: grid;
  grid-template-columns: 18px 1fr;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 2px 7px;
  min-height: 48px;
  padding: 7px;
  text-align: left;
}

.area-delete {
  min-height: 48px;
  padding: 0;
  font-size: 13px;
  font-weight: 700;
}

.area-color {
  grid-row: 1 / 3;
  width: 18px;
  height: 18px;
  border: 1px solid rgba(0, 0, 0, 0.18);
  border-radius: 999px;
}

.area-chip span:not(.area-color) {
  overflow: hidden;
  font-size: 12px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.area-chip small {
  color: var(--muted);
  font-size: 10px;
}

.slider-row,
.color-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.hint {
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

input[type='range'],
input[type='color'] {
  width: 100%;
}

.palette {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.swatch {
  display: grid;
  grid-template-rows: 42px auto auto;
  gap: 4px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 6px;
  min-height: 88px;
  overflow: hidden;
  text-align: center;
}

.swatch.is-active {
  border-color: var(--ink);
  box-shadow: inset 0 0 0 2px #fff;
}

.swatch-chip {
  width: 100%;
  height: 42px;
  border: 1px solid rgba(0, 0, 0, 0.18);
  border-radius: 6px;
  background: var(--swatch-color);
}

.swatch-name {
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.15;
  min-height: 28px;
  overflow-wrap: anywhere;
}

.swatch-code {
  color: var(--muted);
  font-size: 10px;
  line-height: 1.15;
}

.selected-color {
  min-height: 18px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}

@media (min-width: 800px) {
  .app {
    grid-template-columns: 1fr 340px;
    grid-template-rows: auto 1fr;
  }

  .topbar {
    grid-column: 1 / -1;
  }

  .controls {
    border-top: 0;
    border-left: 1px solid var(--line);
    align-content: start;
  }
}

@media (max-width: 380px) {
  .topbar {
    align-items: flex-start;
  }

  .topbar h1 {
    font-size: 18px;
  }

  .tool-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .palette {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (orientation: landscape) and (max-height: 520px) {
  .app {
    grid-template-columns: 1fr 300px;
    grid-template-rows: auto 1fr;
  }

  .topbar {
    grid-column: 1 / -1;
  }

  .controls {
    overflow: auto;
    border-left: 1px solid var(--line);
    border-top: 0;
  }
}