:root {
  --bg: #ffffff;
  --fg: #111111;
  --fg-muted: #555555;
  --border: #dddddd;
  --btn-bg: #111111;
  --btn-fg: #ffffff;
  --btn-bg-secondary: #f0f0f0;
  --btn-fg-secondary: #111111;
  --btn-bg-disabled: #e0e0e0;
  --btn-fg-disabled: #888888;
  --copied-color: #1a7f37;
  --error-color: #c0392b;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111111;
    --fg: #f0f0f0;
    --fg-muted: #999999;
    --border: #333333;
    --btn-bg: #f0f0f0;
    --btn-fg: #111111;
    --btn-bg-secondary: #2a2a2a;
    --btn-fg-secondary: #f0f0f0;
    --btn-bg-disabled: #2a2a2a;
    --btn-fg-disabled: #555555;
    --copied-color: #3fb950;
    --error-color: #f08080;
  }
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

main {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--fg-muted);
  font-size: 1rem;
  margin-top: -1rem;
}

.coords {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.coord-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.75rem 1rem;
  gap: 1rem;
}

.coord-row + .coord-row {
  border-top: 1px solid var(--border);
}

.coord-label {
  color: var(--fg-muted);
  font-size: 0.875rem;
  white-space: nowrap;
}

.coord-value {
  font-size: 1.125rem;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  user-select: text;
}

.status {
  font-size: 0.9rem;
  color: var(--fg-muted);
  min-height: 1.25em;
}

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

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

button {
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  line-height: 1.4;
  transition: opacity 0.1s;
}

button:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 2px;
}

#btn-get,
#btn-update {
  background: var(--btn-bg);
  color: var(--btn-fg);
}

#btn-copy {
  background: var(--btn-bg-secondary);
  color: var(--btn-fg-secondary);
}

button:disabled {
  background: var(--btn-bg-disabled);
  color: var(--btn-fg-disabled);
  cursor: not-allowed;
}

button:not(:disabled):hover {
  opacity: 0.85;
}

.copied {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--copied-color);
}