:root {
  --bg: #f7f7f8;
  --fg: #1a1a1a;
  --fg-muted: #6b6b70;
  --border: #c9c9cf;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --error: #cc3333;
  --panel-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16161a;
    --fg: #eaeaef;
    --fg-muted: #9c9ca4;
    --border: #3a3a42;
    --accent: #5b8cf5;
    --accent-fg: #0b0b0d;
    --panel-bg: #1f1f24;
  }
}

:root[data-theme="dark"] {
  --bg: #16161a;
  --fg: #eaeaef;
  --fg-muted: #9c9ca4;
  --border: #3a3a42;
  --accent: #5b8cf5;
  --accent-fg: #0b0b0d;
  --panel-bg: #1f1f24;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.app {
  display: flex;
  align-items: stretch;
  min-height: 100vh;
}

.sidebar {
  flex: 0 0 360px;
  width: 360px;
  padding: 32px 20px 64px;
  overflow-y: auto;
  border-right: 1px solid var(--border);
}

.preview {
  flex: 1 1 auto;
  min-width: 0;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.preview-panel {
  flex: 1 1 0;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.preview-title {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--fg-muted);
}

.preview-box {
  flex: 1 1 auto;
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.preview-box.empty {
  color: var(--fg-muted);
  font-size: 13px;
}

.preview-box.drag-over {
  border-color: var(--accent);
}

.svg-drop-box {
  cursor: pointer;
}

.svg-drop-box:hover,
.svg-drop-box:focus-visible {
  border-color: var(--accent);
}

.preview-placeholder {
  margin: 0;
  padding: 0 24px;
  text-align: center;
}

.preview-box img {
  max-width: 100%;
  max-height: 100%;
}

.kicad-preview-box {
  background: #1a1d21;
}

.kicad-preview-box.empty {
  color: #6b7076;
}

.kicad-preview-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.kicad-edge-shape {
  fill: none;
  stroke: #f2b632;
  vector-effect: non-scaling-stroke;
}

.kicad-mask-shape {
  fill: #7fd8c4;
  fill-opacity: 0.85;
  stroke: none;
}

.kicad-copper-shape {
  stroke: #8a5a2b;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.kicad-copper-hatch-bg {
  fill: #c8874a;
}

.kicad-copper-hatch-line {
  stroke: #8a5a2b;
}

.kicad-covered-shape {
  stroke: #8c8c8c;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.kicad-covered-hatch-bg {
  fill: #000000;
}

.kicad-covered-hatch-line {
  stroke: #8c8c8c;
}

.kicad-led-window-shape {
  fill: #fff2a8;
  stroke: none;
}

@media (max-width: 900px) {
  .app {
    flex-direction: column;
  }

  .sidebar {
    flex: 0 0 auto;
    width: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .preview-panel {
    min-height: 320px;
  }
}

h1 {
  font-size: 22px;
  margin: 0 0 4px;
}

.subtitle {
  margin: 0 0 24px;
  color: var(--fg-muted);
  font-size: 14px;
}

.file-name {
  margin-top: 10px;
  font-size: 13px;
  color: var(--fg-muted);
  word-break: break-all;
}

.stats-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 20px;
}

.stat {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--fg-muted);
}

.stat-value {
  font-size: 20px;
  font-weight: 600;
}

.controls {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.controls label {
  font-size: 13px;
  width: 100%;
  color: var(--fg-muted);
}

#layerSelect,
#ledWindowSelect,
#anchorSelect {
  flex: 1 1 auto;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel-bg);
  color: var(--fg);
  font-size: 14px;
}

#layerSelect:disabled {
  opacity: 0.5;
}

.controls .checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--fg);
  cursor: pointer;
}

.scale-input,
.size-input {
  width: 90px;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel-bg);
  color: var(--fg);
  font-size: 14px;
}

.size-times {
  color: var(--fg-muted);
}

.link-button {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 0;
}

.copy-button {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

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

.copy-status {
  font-size: 13px;
  width: 100%;
  color: var(--fg-muted);
}

.copy-status.error {
  color: var(--error);
}

.how-to {
  margin-top: 28px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--fg-muted);
}

.how-to h2 {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.how-to ol,
.how-to ul {
  margin: 0;
  padding-left: 18px;
}

.how-to li {
  margin-top: 4px;
}

.how-to p {
  margin: 8px 0 0;
}

.how-to code {
  color: var(--fg);
  font-size: 12px;
}

.clipboard-staging {
  position: absolute;
  left: -9999px;
  top: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.clipboard-staging.visible {
  position: static;
  left: auto;
  width: 100%;
  height: 160px;
  opacity: 1;
  margin-top: 16px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-bg);
  color: var(--fg);
  font-family: monospace;
  font-size: 12px;
}