/* Design tokens + reset. Light by default, dark via prefers-color-scheme —
   no theme switcher in this pass (CLAUDE.md: light/dark via media query). */

:root {
  --color-bg: #ffffff;
  --color-surface: #f5f6f8;
  --color-surface-raised: #ffffff;
  --color-border: #d0d5dd;
  --color-border-strong: #98a2b3;
  --color-text: #101828;
  --color-text-muted: #475467;
  --color-link: #175cd3;
  --color-primary: #175cd3;
  --color-primary-text: #ffffff;
  --color-primary-hover: #10469e;
  --color-danger: #b42318;
  --color-danger-bg: #fef3f2;
  --color-danger-border: #fda29b;
  --color-success: #067647;
  --color-focus: #175cd3;
  --color-row-hover: #eef2f8;
  --color-code-bg: #eef2f6;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.8125rem;
  --font-size-md: 0.9375rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;

  --radius-sm: 4px;
  --radius-md: 6px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0c1116;
    --color-surface: #131a22;
    --color-surface-raised: #1a222c;
    --color-border: #2c3947;
    --color-border-strong: #445466;
    --color-text: #e6edf3;
    --color-text-muted: #9aa8b8;
    --color-link: #7db1ff;
    --color-primary: #4c8dff;
    --color-primary-text: #05121f;
    --color-primary-hover: #7db1ff;
    --color-danger: #ff8a80;
    --color-danger-bg: #2c1513;
    --color-danger-border: #6e2a24;
    --color-success: #3ddc97;
    --color-focus: #7db1ff;
    --color-row-hover: #1c2530;
    --color-code-bg: #1c2530;
  }
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: 1.4;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 var(--space-2) 0;
}
h1 { font-size: var(--font-size-xl); }
h2 { font-size: var(--font-size-lg); }

p { margin: 0 0 var(--space-2) 0; }

a {
  color: var(--color-link);
}

code {
  font-family: var(--font-mono);
  background: var(--color-code-bg);
  padding: 0.05em 0.35em;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
}
button:hover {
  background: var(--color-row-hover);
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}
button.danger {
  color: var(--color-danger);
  border-color: var(--color-danger-border);
}
button.danger:hover {
  background: var(--color-danger-bg);
}

input, select, textarea {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
}

label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

/* Accessible focus rings everywhere, mouse clicks don't show them. */
:focus {
  outline: none;
}
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.muted {
  color: var(--color-text-muted);
}

.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.addr {
  font-family: var(--font-mono);
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}