:root {
  color-scheme: light dark;
  --bg: #f4f5f6;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-strong: rgba(255, 255, 255, 0.98);
  --text: #17191c;
  --text-muted: #565c65;
  --border: rgba(23, 25, 28, 0.14);
  --accent: #006e61;
  --accent-strong: #005348;
  --canvas-a: #d9dce1;
  --canvas-b: #eef1f4;
  --line: #ff5c40;
  --label-bg: rgba(23, 25, 28, 0.84);
  --label-text: #f8fafc;
  --danger: #a32618;
  --shadow: 0 0.5rem 1.5rem rgba(23, 25, 28, 0.1);
  font-family: "Segoe UI", "Helvetica Neue", Helvetica, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181c;
    --panel: rgba(27, 31, 37, 0.92);
    --panel-strong: rgba(31, 35, 42, 0.98);
    --text: #edf1f6;
    --text-muted: #a6b0bd;
    --border: rgba(237, 241, 246, 0.14);
    --accent: #36a391;
    --accent-strong: #52c1af;
    --canvas-a: #1d232c;
    --canvas-b: #252d38;
    --line: #ff8a6c;
    --label-bg: rgba(237, 241, 246, 0.9);
    --label-text: #17191c;
    --danger: #ff7f6d;
    --shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.24);
  }
}

* {
  box-sizing: border-box;
}

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

body {
  background: var(--bg);
  color: var(--text);
}

button,
input {
  font: inherit;
}

button,
.file-picker,
.editable-stat {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--panel-strong);
  color: var(--text);
}

button,
.file-picker {
  padding: 0.55rem 0.8rem;
}

button {
  cursor: pointer;
}

button:hover,
.file-picker:hover,
.editable-stat:hover {
  border-color: var(--accent);
}

button:focus-visible,
input:focus-visible,
.file-picker:focus-within,
.editable-stat:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: start;
  justify-content: space-between;
  padding: 0.75rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 2;
}

.toolbar-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.toolbar-load,
.toolbar-stats {
  flex: 1 1 24rem;
}

.toolbar-view {
  flex: 0 0 auto;
}

.file-picker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.file-picker input {
  width: 0.1px;
  height: 0.1px;
  opacity: 0;
  position: absolute;
  pointer-events: none;
}

.url-loader {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.url-loader input,
.inline-edit-input {
  min-width: 18rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--panel-strong);
  color: var(--text);
}

.toolbar-hint,
.stat-label {
  color: var(--text-muted);
  font-size: 0.86rem;
}

.stat-block,
.editable-stat {
  display: grid;
  gap: 0.2rem;
  min-width: 14rem;
  padding: 0.55rem 0.7rem;
}

.editable-stat {
  cursor: text;
}

.stat-value {
  font-variant-numeric: tabular-nums;
}

.viewport {
  position: relative;
  overflow: hidden;
  min-height: 0;
  background:
    linear-gradient(45deg, var(--canvas-a) 25%, transparent 25%, transparent 75%, var(--canvas-a) 75%),
    linear-gradient(45deg, var(--canvas-a) 25%, transparent 25%, transparent 75%, var(--canvas-a) 75%);
  background-color: var(--canvas-b);
  background-size: 2rem 2rem;
  background-position: 0 0, 1rem 1rem;
  touch-action: none;
}

.empty-state {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  text-align: left;
  color: var(--text-muted);
  padding: 0.65rem 0.8rem;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  pointer-events: none;
  max-width: min(28rem, calc(100vw - 2rem));
}

.empty-state p {
  margin: 0;
}

.stage {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: top left;
  user-select: none;
}

.stage img,
.line-layer,
.label-layer {
  position: absolute;
  inset: 0;
}

.stage img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.line-layer {
  overflow: visible;
  pointer-events: none;
}

.measurement-line {
  stroke: var(--line);
  stroke-linecap: square;
}

.label-layer {
  pointer-events: none;
}

.line-label {
  position: absolute;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  width: max-content;
  max-width: none;
  padding: 0.15rem 0.3rem;
  border-radius: 0.18rem;
  background: var(--label-bg);
  color: var(--label-text);
  box-shadow: var(--shadow);
  pointer-events: auto;
  font-size: 0.75rem;
  line-height: 1.15;
}

.line-label button {
  padding: 0;
  min-width: 0;
  width: auto;
  height: auto;
  border-radius: 0.15rem;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 0.8rem;
  line-height: 1;
  white-space: nowrap;
}

.line-label button:hover {
  color: var(--danger);
}

.line-label-value {
  border: 0;
  background: transparent;
  color: inherit;
  padding: 0;
  cursor: text;
  text-align: left;
}

.line-label-value,
.line-label input {
  width: auto;
  min-width: 0;
}

.line-label-value {
  font-size: inherit;
}

.line-label input {
  border: 0;
  border-radius: 0.15rem;
  padding: 0.1rem 0.2rem;
  font-size: inherit;
}

.about-dialog {
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  max-width: min(36rem, calc(100vw - 2rem));
}

.about-dialog::backdrop {
  background: rgba(0, 0, 0, 0.55);
}

.about-panel {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--border);
  background: light-dark(#ffffff, #1f232a);
  box-shadow: var(--shadow);
}

.about-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
}

.about-header h1 {
  margin: 0;
  font-size: 1.1rem;
}

.about-body {
  display: grid;
  gap: 0.8rem;
}

.about-body p {
  margin: 0;
}

.about-body a {
  color: var(--accent-strong);
}

.about-close-button {
  white-space: nowrap;
}

.is-active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--panel-strong) 84%, var(--accent) 16%);
}

.is-panning {
  cursor: grabbing;
}