:root {
  color-scheme: light;
  --bg: #f4f1ea;
  --panel: #fdfcf8;
  --ink: #191b1f;
  --muted: #667085;
  --line: #c8c2b8;
  --button: #ffffff;
  --button-hover: #111827;
  --button-hover-ink: #ffffff;
  --accent: #0f766e;
  --warn: #b42318;
  --canvas-bg: #d4d8dd;
  --canvas-cell-bg: #cfd4db;
  --workspace-grid: rgba(25, 27, 31, 0.04);
  --editor-grid: rgba(17, 24, 39, 0.38);
  --cell-text: #ffffff;
  --manual-dd: #384152;
  --manual-code-bg: #ffffff;
}

:root[data-theme="dark"],
body[data-theme="dark"],
body.theme-dark {
  color-scheme: dark;
  --bg: #1f2329;
  --panel: #272c33;
  --ink: #edf0f3;
  --muted: #aeb7c2;
  --line: #49515c;
  --button: #303741;
  --button-hover: #d7dde5;
  --button-hover-ink: #15181d;
  --accent: #33c5b5;
  --warn: #ff8a80;
  --canvas-bg: #242a31;
  --canvas-cell-bg: #303741;
  --workspace-grid: rgba(215, 221, 229, 0.045);
  --editor-grid: rgba(218, 226, 236, 0.24);
  --cell-text: #ffffff;
  --manual-dd: #c8d0da;
  --manual-code-bg: #303741;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[hidden] {
  display: none !important;
}

button,
input {
  font: inherit;
}

.app {
  display: grid;
  grid-template-columns: 152px minmax(0, 1fr);
  min-height: 100vh;
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 100vh;
  padding: 12px;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.tool-group,
.phase-panel,
.mode-panel {
  display: grid;
  gap: 8px;
}

#manualBtn[aria-pressed="true"],
#themeBtn[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--button-hover-ink);
}

button {
  min-height: 34px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--button);
  color: var(--ink);
  cursor: pointer;
}

button:hover,
button:focus-visible {
  background: var(--button-hover);
  color: var(--button-hover-ink);
  outline: none;
}

button:disabled {
  cursor: default;
  opacity: 0.45;
}

h1 {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.phase-value {
  display: block;
  min-height: 48px;
  color: var(--accent);
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
}

.phase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.field,
.toggle {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.toggle {
  grid-template-columns: 18px 1fr;
  align-items: center;
}

input[type="number"] {
  width: 100%;
  min-height: 34px;
  padding: 5px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.status {
  margin-top: auto;
  min-height: 46px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.workbench {
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 100vh;
  padding: 18px;
  background:
    linear-gradient(90deg, var(--workspace-grid) 1px, transparent 1px),
    linear-gradient(0deg, var(--workspace-grid) 1px, transparent 1px),
    var(--canvas-bg);
  background-size: 20px 20px;
}

.canvas-wrap {
  width: min(100%, 800px);
  aspect-ratio: 8 / 5;
  box-shadow: 0 16px 40px rgba(16, 24, 40, 0.22);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--canvas-cell-bg);
  image-rendering: pixelated;
  touch-action: none;
  user-select: none;
}

.manual-view {
  min-width: 0;
  min-height: 100vh;
  padding: 32px;
  overflow: auto;
  background: var(--bg);
}

.manual {
  max-width: 860px;
  margin: 0 auto;
  color: var(--ink);
  line-height: 1.55;
}

.manual header {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.manual-kicker {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.manual h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.05;
}

.manual h3 {
  margin: 26px 0 8px;
  font-size: 18px;
}

.manual p,
.manual ol,
.manual dl {
  margin: 0;
}

.manual ol {
  padding-left: 22px;
}

.manual li + li {
  margin-top: 6px;
}

.manual dl {
  display: grid;
  grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
  gap: 8px 18px;
}

.manual dt {
  font-weight: 800;
}

.manual dd {
  margin: 0;
  color: var(--manual-dd);
}

.manual code {
  padding: 1px 5px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--manual-code-bg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

@media (max-width: 760px) {
  .app {
    grid-template-columns: 1fr;
  }

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

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

  .phase-panel {
    grid-template-columns: 80px 1fr;
    align-items: center;
  }

  .phase-panel h1,
  .phase-value {
    grid-column: 1;
  }

  .phase-grid,
  .phase-panel .field {
    grid-column: 2;
  }

  .workbench {
    min-height: auto;
    padding: 10px;
  }

  .manual-view {
    min-height: auto;
    padding: 20px;
  }

  .manual h2 {
    font-size: 34px;
  }

  .manual dl {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .manual dd + dt {
    margin-top: 10px;
  }
}