:root {
  color-scheme: light dark;

  --bg: #faf9f7;
  --bg-elevated: #ffffff;
  --bg-subtle: #f4f1ec;
  --border: #ebe6dd;
  --border-strong: #d9d2c4;
  --text: #2b2620;
  --text-muted: #7a7266;
  --text-faint: #a69d8d;

  --accent: #6d5efc;
  --accent-hover: #5c4ff0;
  --accent-text: #ffffff;
  --accent-soft: #efecff;
  --accent-soft-border: #dcd6ff;

  --success: #15803d;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --warning: #b45309;
  --warning-bg: #fffbeb;
  --warning-border: #fde68a;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --info: #2563eb;
  --info-bg: #eff6ff;
  --info-border: #bfdbfe;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;

  --shadow-sm: 0 1px 2px rgba(43, 38, 32, 0.05);
  --shadow: 0 2px 8px rgba(43, 38, 32, 0.06), 0 1px 2px rgba(43, 38, 32, 0.04);
  --shadow-lg: 0 12px 32px rgba(43, 38, 32, 0.10);

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', ui-monospace, 'Roboto Mono', Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16141f;
    --bg-elevated: #1e1c2a;
    --bg-subtle: #262335;
    --border: #322e42;
    --border-strong: #423d58;
    --text: #f2f0f7;
    --text-muted: #a8a2bd;
    --text-faint: #746e8c;

    --accent: #9b8dff;
    --accent-hover: #ab9fff;
    --accent-text: #16141f;
    --accent-soft: #2a2540;
    --accent-soft-border: #3e3760;

    --success: #4ade80;
    --success-bg: #0f1f14;
    --success-border: #14532d;
    --warning: #fbbf24;
    --warning-bg: #221a08;
    --warning-border: #78350f;
    --danger: #f87171;
    --danger-bg: #23100f;
    --danger-border: #7f1d1d;
    --info: #60a5fa;
    --info-bg: #0e1a2b;
    --info-border: #1e3a8a;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  }
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button, input {
  font-family: inherit;
}

a {
  color: inherit;
}

.icon {
  display: inline-block;
  vertical-align: middle;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
  box-shadow: 0 1px 2px rgba(43, 38, 32, 0.06);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-subtle);
  border-color: var(--text-faint);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-subtle);
  color: var(--text);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border-color: var(--border-strong);
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-bg);
  border-color: var(--danger-border);
}