:root {
    --pui-color-text-primary: #0f172a;
    --pui-color-text-secondary: #334155;
    --pui-color-text-muted: #64748b;
    --pui-color-text-on-accent: #ffffff;
    --pui-color-surface-page: #ffffff;
    --pui-color-surface-card: #ffffff;
    --pui-color-surface-muted: #f8fafc;
    --pui-color-border-default: #e2e8f0;
    --pui-color-border-strong: #2563eb;
    --pui-color-action-primary: #2563eb;
    --pui-color-action-primary-hover: #1d4ed8;
    --pui-color-accent-soft: #dbeafe;
    --pui-color-success: #16a34a;
    --pui-color-success-strong: #166534;
    --pui-color-success-soft: #dcfce7;
    --pui-color-info: #0284c7;
    --pui-color-info-strong: #0c4a6e;
    --pui-color-info-soft: #e0f2fe;
    --pui-color-warning: #facc15;
    --pui-color-warning-strong: #854d0e;
    --pui-color-warning-soft: #fef9c3;
    --pui-color-danger: #dc2626;
    --pui-color-danger-strong: #991b1b;
    --pui-color-danger-soft: #fee2e2;
    --pui-font-family-base: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --pui-font-size-heading-lg: 2rem;
    --pui-font-size-heading-md: 1.5rem;
    --pui-font-size-body-lg: 1.05rem;
    --pui-font-size-body-md: 1rem;
    --pui-font-size-body-sm: 0.95rem;
    --pui-font-size-caption: 0.8rem;
    --pui-line-height-tight: 1.2;
    --pui-line-height-body: 1.5;
    --pui-line-height-relaxed: 1.7;
    --pui-font-weight-regular: 400;
    --pui-font-weight-medium: 500;
    --pui-font-weight-semibold: 600;
    --pui-font-weight-bold: 700;
    --pui-breakpoint-sm: 576px;
    --pui-breakpoint-md: 768px;
    --pui-breakpoint-lg: 1024px;
    --pui-breakpoint-xl: 1280px;
    --pui-space-1: 0.125rem;
    --pui-space-2: 0.25rem;
    --pui-space-3: 0.5rem;
    --pui-space-4: 0.75rem;
    --pui-space-5: 1rem;
    --pui-space-6: 1.5rem;
    --pui-space-7: 2rem;
    --pui-space-8: 2.5rem;
    --pui-space-9: 3rem;
    --pui-space-10: 4rem;
    --pui-radius-sm: 0.375rem;
    --pui-radius-md: 0.75rem;
    --pui-radius-lg: 1rem;
    --pui-shadow-subtle: 0 2px 8px rgba(15, 23, 42, 0.05);
    --pui-shadow-soft: 0 8px 24px rgba(15, 23, 42, 0.06);
    --pui-shadow-raised: 0 14px 32px rgba(15, 23, 42, 0.12);
    --pui-shadow-overlay: 0 20px 48px rgba(15, 23, 42, 0.16);
    --pui-easing-standard: cubic-bezier(0.2, 0, 0, 1);
    --pui-easing-emphasized: cubic-bezier(0.2, 0.8, 0.2, 1);
    --pui-easing-exit: cubic-bezier(0.4, 0, 1, 1);
    --pui-motion-fast: 160ms var(--pui-easing-standard);
    --pui-motion-medium: 240ms var(--pui-easing-standard);
    --pui-motion-slow: 320ms var(--pui-easing-emphasized);
    --pui-focus-width: 3px;
    --pui-focus-color: #2563eb;
    --pui-focus-color-rgb: 37, 99, 235;
    --pui-focus-outline-color: rgba(var(--pui-focus-color-rgb), 0.35);
    --pui-focus-ring: 0 0 0 var(--pui-focus-width) rgba(var(--pui-focus-color-rgb), 0.2);
    --pui-disabled-opacity: 0.6;
    --pui-touch-target-min: 2.75rem;
}

html {
    font-family: var(--pui-font-family-base);
}

@media (prefers-reduced-motion: reduce) {
    :root {
        --pui-motion-fast: 0ms linear;
        --pui-motion-medium: 0ms linear;
        --pui-motion-slow: 0ms linear;
    }
}

/* ─── Component unavailable panel ─────────────────────────────────────────── */

.pui-component-unavailable {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--pui-color-border-subtle, #e5e7eb);
    border-left: 4px solid var(--pui-color-tone-amber, #d97706);
    border-radius: 0.5rem;
    background: var(--pui-color-surface-muted, #fffaf3);
    color: var(--pui-color-text-strong, #1f2937);
}

.pui-component-unavailable__title {
    margin: 0;
    font-weight: 600;
    font-size: 1rem;
}

.pui-component-unavailable__body {
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.45;
}

.pui-component-unavailable__reference {
    margin: 0;
    font-size: 0.8125rem;
    color: var(--pui-color-text-muted, #6b7280);
    font-variant-numeric: tabular-nums;
}

.pui-component-unavailable__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.pui-component-unavailable__retry {
    padding: 0.5rem 1rem;
    border: 1px solid var(--pui-color-border-strong, #1f2937);
    background: transparent;
    color: var(--pui-color-text-strong, #1f2937);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
}

.pui-component-unavailable__retry:hover {
    background: var(--pui-color-surface-strong, #f3f4f6);
}