export const COMMON_CSS = `
:root {
  /* Brand & Accents */
  --primary: #0066cc;
  --primary-hover: #0052a3;
  --primary-active: #003d7a;
  --primary-light: #e6f0fa;
  --primary-ring: rgba(0, 102, 204, 0.25);

  /* Neutrals & Surfaces */
  --surface-canvas: #f8fafc;
  --surface-card: #ffffff;
  --surface-muted: #f1f5f9;
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;

  /* Typography */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  /* Semantic Feedback */
  --success: #10b981;
  --success-bg: #ecfdf5;
  --success-border: #a7f3d0;
  --success-text: #065f46;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --warning-border: #fde68a;
  --warning-text: #92400e;
  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --danger-text: #991b1b;
  --info: #0284c7;
  --info-bg: #f0f9ff;
  --info-border: #bae6fd;
  --info-text: #0369a1;

  /* Geometry & Spacing */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --touch-target-min: 48px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-canvas: #0b0f19;
    --surface-card: #111827;
    --surface-muted: #1e293b;
    --border-subtle: #1f2937;
    --border-strong: #374151;

    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;

    --primary-light: #172554;
    --success-bg: #064e3b;
    --success-border: #065f46;
    --success-text: #6ee7b7;
    --warning-bg: #451a03;
    --warning-border: #78350f;
    --warning-text: #fcd34d;
    --danger-bg: #450a0a;
    --danger-border: #7f1d1d;
    --danger-text: #fca5a5;
    --info-bg: #082f49;
    --info-border: #075985;
    --info-text: #7dd3fc;
  }
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--surface-canvas);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* Common interactive components */
button, .btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  min-height: 44px;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.15s ease-in-out;
  text-decoration: none;
}

button:active, .btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-danger {
  background-color: var(--danger);
  color: #ffffff;
  border-color: var(--danger);
}
.btn-danger:hover {
  background-color: #dc2626;
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn-outline:hover {
  background-color: var(--surface-muted);
}

input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
  min-height: 48px;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--surface-card);
  color: var(--text-primary);
  width: 100%;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-ring);
}

.card {
  background-color: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  line-height: 1;
}

.badge-success { background: var(--success-bg); color: var(--success-text); border: 1px solid var(--success-border); }
.badge-warning { background: var(--warning-bg); color: var(--warning-text); border: 1px solid var(--warning-border); }
.badge-danger { background: var(--danger-bg); color: var(--danger-text); border: 1px solid var(--danger-border); }
.badge-info { background: var(--info-bg); color: var(--info-text); border: 1px solid var(--info-border); }
.badge-secondary { background: var(--surface-muted); color: var(--text-secondary); border: 1px solid var(--border-subtle); }
`;