/**
 * Sparkles Design System (spui) v1
 * Framework-onafhankelijk HTML/CSS design system, geïnspireerd op shadcn/ui.
 *
 * Gebruik:
 *   <link rel="stylesheet" href="/design-system/v1/design-system.css">
 *   <html data-theme="light"> of data-theme="dark"
 *
 * Namespace: .spui-* (componenten) — geen globale shop-styles overschrijven.
 * Tokens: semantische shadcn-namen (--background, --primary, …).
 *
 * STABIEL: tokens + basiscomponenten in dit bestand.
 * EXPERIMENTEEL: zie sectie "Experimental" onderaan (opt-in).
 */

/* ==========================================================================
   1. Design tokens — Light theme (shadcn/ui OKLCH defaults)
   ========================================================================== */

:root,
[data-theme="light"],
.spui-root {
  color-scheme: light;

  /* Surfaces */
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.145 0 0);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.145 0 0);

  /* Brand / actions */
  --primary: oklch(0.205 0 0);
  --primary-foreground: oklch(0.985 0 0);
  --secondary: oklch(0.97 0 0);
  --secondary-foreground: oklch(0.205 0 0);

  /* Subtle / muted */
  --muted: oklch(0.97 0 0);
  --muted-foreground: oklch(0.556 0 0);
  --accent: oklch(0.97 0 0);
  --accent-foreground: oklch(0.205 0 0);

  /* Status */
  --destructive: oklch(0.577 0.245 27.325);
  --destructive-foreground: oklch(0.985 0 0);
  --success: oklch(0.55 0.16 145);
  --success-foreground: oklch(0.985 0 0);
  --warning: oklch(0.75 0.15 75);
  --warning-foreground: oklch(0.205 0 0);
  --info: oklch(0.55 0.14 250);
  --info-foreground: oklch(0.985 0 0);

  /* Chrome */
  --border: oklch(0.922 0 0);
  --input: oklch(0.922 0 0);
  --ring: oklch(0.708 0 0);

  /* Charts (shadcn) */
  --chart-1: oklch(0.646 0.222 41.116);
  --chart-2: oklch(0.6 0.118 184.704);
  --chart-3: oklch(0.398 0.07 227.392);
  --chart-4: oklch(0.828 0.189 84.429);
  --chart-5: oklch(0.769 0.188 70.08);

  /* Radius — shadcn --radius */
  --radius: 0.5rem;
  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);
  --radius-full: 9999px;

  /* Typography */
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --letter-spacing-tight: -0.025em;

  /* Spacing scale (4px base) */
  --space-0: 0;
  --space-0-5: 0.125rem;
  --space-1: 0.25rem;
  --space-1-5: 0.375rem;
  --space-2: 0.5rem;
  --space-2-5: 0.625rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 oklch(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 oklch(0 0 0 / 0.1), 0 1px 2px -1px oklch(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px oklch(0 0 0 / 0.1), 0 2px 4px -2px oklch(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px oklch(0 0 0 / 0.1), 0 4px 6px -4px oklch(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px oklch(0 0 0 / 0.1), 0 8px 10px -6px oklch(0 0 0 / 0.1);

  /* Z-index layers */
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-fixed: 1200;
  --z-modal-backdrop: 1300;
  --z-modal: 1400;
  --z-popover: 1500;
  --z-toast: 1600;
  --z-tooltip: 1700;

  /* Motion */
  --duration-fast: 150ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);

  /* Focus ring */
  --focus-ring-width: 2px;
  --focus-ring-offset: 2px;

  /* Control sizes */
  --control-height-sm: 2rem;
  --control-height-md: 2.5rem;
  --control-height-lg: 2.75rem;
  --control-px-sm: 0.75rem;
  --control-px-md: 1rem;
  --control-px-lg: 1.5rem;
}

/* ==========================================================================
   2. Design tokens — Dark theme
   ========================================================================== */

[data-theme="dark"] {
  color-scheme: dark;

  --background: oklch(0.145 0 0);
  --foreground: oklch(0.985 0 0);
  --card: oklch(0.205 0 0);
  --card-foreground: oklch(0.985 0 0);
  --popover: oklch(0.205 0 0);
  --popover-foreground: oklch(0.985 0 0);

  --primary: oklch(0.922 0 0);
  --primary-foreground: oklch(0.205 0 0);
  --secondary: oklch(0.269 0 0);
  --secondary-foreground: oklch(0.985 0 0);

  --muted: oklch(0.269 0 0);
  --muted-foreground: oklch(0.708 0 0);
  --accent: oklch(0.269 0 0);
  --accent-foreground: oklch(0.985 0 0);

  --destructive: oklch(0.704 0.191 22.216);
  --destructive-foreground: oklch(0.985 0 0);
  --success: oklch(0.65 0.15 145);
  --success-foreground: oklch(0.145 0 0);
  --warning: oklch(0.8 0.14 75);
  --warning-foreground: oklch(0.145 0 0);
  --info: oklch(0.65 0.12 250);
  --info-foreground: oklch(0.145 0 0);

  --border: oklch(1 0 0 / 10%);
  --input: oklch(1 0 0 / 15%);
  --ring: oklch(0.556 0 0);

  --chart-1: oklch(0.488 0.243 264.376);
  --chart-2: oklch(0.696 0.17 162.48);
  --chart-3: oklch(0.769 0.188 70.08);
  --chart-4: oklch(0.627 0.265 303.9);
  --chart-5: oklch(0.645 0.246 16.439);

  --shadow-xs: 0 1px 2px 0 oklch(0 0 0 / 0.3);
  --shadow-sm: 0 1px 3px 0 oklch(0 0 0 / 0.4), 0 1px 2px -1px oklch(0 0 0 / 0.4);
  --shadow-md: 0 4px 6px -1px oklch(0 0 0 / 0.4), 0 2px 4px -2px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px oklch(0 0 0 / 0.45), 0 4px 6px -4px oklch(0 0 0 / 0.4);
  --shadow-xl: 0 20px 25px -5px oklch(0 0 0 / 0.5), 0 8px 10px -6px oklch(0 0 0 / 0.45);
}

/* Prefers-color-scheme fallback when geen data-theme is gezet */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;

    --background: oklch(0.145 0 0);
    --foreground: oklch(0.985 0 0);
    --card: oklch(0.205 0 0);
    --card-foreground: oklch(0.985 0 0);
    --popover: oklch(0.205 0 0);
    --popover-foreground: oklch(0.985 0 0);
    --primary: oklch(0.922 0 0);
    --primary-foreground: oklch(0.205 0 0);
    --secondary: oklch(0.269 0 0);
    --secondary-foreground: oklch(0.985 0 0);
    --muted: oklch(0.269 0 0);
    --muted-foreground: oklch(0.708 0 0);
    --accent: oklch(0.269 0 0);
    --accent-foreground: oklch(0.985 0 0);
    --destructive: oklch(0.704 0.191 22.216);
    --destructive-foreground: oklch(0.985 0 0);
    --border: oklch(1 0 0 / 10%);
    --input: oklch(1 0 0 / 15%);
    --ring: oklch(0.556 0 0);
  }
}

/* ==========================================================================
   3. Scoped base / reset
   Alleen binnen .spui-root of op .spui-* — geen globale * reset.
   ========================================================================== */

.spui-root {
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.spui-root *,
.spui-root *::before,
.spui-root *::after,
[class^="spui-"],
[class*=" spui-"] {
  box-sizing: border-box;
}

.spui-root img,
.spui-root svg,
.spui-root video {
  display: block;
  max-width: 100%;
}

.spui-root button,
.spui-root input,
.spui-root select,
.spui-root textarea {
  font: inherit;
}

/* ==========================================================================
   4. Shared focus & disabled
   ========================================================================== */

.spui-focus-ring:focus-visible,
.spui-button:focus-visible,
.spui-input:focus-visible,
.spui-select:focus-visible,
.spui-tabs__trigger:focus-visible,
.spui-dialog__close:focus-visible {
  outline: var(--focus-ring-width) solid var(--ring);
  outline-offset: var(--focus-ring-offset);
}

.spui-button:disabled,
.spui-button[aria-disabled="true"],
.spui-input:disabled,
.spui-select:disabled,
.spui-tabs__trigger:disabled {
  pointer-events: none;
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==========================================================================
   5. Button
   ========================================================================== */

.spui-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: var(--control-height-md);
  padding: 0 var(--control-px-md);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background-color: var(--primary);
  color: var(--primary-foreground);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition:
    background-color var(--duration-fast) var(--ease-default),
    color var(--duration-fast) var(--ease-default),
    border-color var(--duration-fast) var(--ease-default),
    opacity var(--duration-fast) var(--ease-default),
    box-shadow var(--duration-fast) var(--ease-default);
}

.spui-button:hover:not(:disabled):not([aria-disabled="true"]) {
  background-color: color-mix(in oklch, var(--primary) 90%, transparent);
}

.spui-button--primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.spui-button--secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
}

.spui-button--secondary:hover:not(:disabled):not([aria-disabled="true"]) {
  background-color: color-mix(in oklch, var(--secondary) 80%, var(--foreground));
}

.spui-button--outline {
  background-color: var(--background);
  color: var(--foreground);
  border-color: var(--border);
}

.spui-button--outline:hover:not(:disabled):not([aria-disabled="true"]) {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.spui-button--ghost {
  background-color: transparent;
  color: var(--foreground);
}

.spui-button--ghost:hover:not(:disabled):not([aria-disabled="true"]) {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.spui-button--destructive {
  background-color: var(--destructive);
  color: var(--destructive-foreground);
}

.spui-button--destructive:hover:not(:disabled):not([aria-disabled="true"]) {
  background-color: color-mix(in oklch, var(--destructive) 90%, transparent);
}

.spui-button--link {
  height: auto;
  padding: 0;
  background: transparent;
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.spui-button--link:hover:not(:disabled):not([aria-disabled="true"]) {
  background: transparent;
  opacity: 0.8;
}

.spui-button--sm {
  height: var(--control-height-sm);
  padding: 0 var(--control-px-sm);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}

.spui-button--lg {
  height: var(--control-height-lg);
  padding: 0 var(--control-px-lg);
  font-size: var(--font-size-base);
}

.spui-button--icon {
  width: var(--control-height-md);
  padding: 0;
}

.spui-button--icon.spui-button--sm {
  width: var(--control-height-sm);
}

.spui-button--icon.spui-button--lg {
  width: var(--control-height-lg);
}

.spui-button--block {
  display: flex;
  width: 100%;
}

/* ==========================================================================
   6. Label
   ========================================================================== */

.spui-label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  color: var(--foreground);
  cursor: default;
}

.spui-label[for] {
  cursor: pointer;
}

.spui-label--muted {
  color: var(--muted-foreground);
  font-weight: var(--font-weight-normal);
}

.spui-label + .spui-input,
.spui-label + .spui-select,
.spui-field .spui-label + * {
  margin-top: var(--space-1-5);
}

/* ==========================================================================
   7. Input
   ========================================================================== */

.spui-input {
  display: flex;
  width: 100%;
  height: var(--control-height-md);
  padding: 0 var(--space-3);
  border: 1px solid var(--input);
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  transition:
    border-color var(--duration-fast) var(--ease-default),
    box-shadow var(--duration-fast) var(--ease-default);
}

.spui-input::placeholder {
  color: var(--muted-foreground);
}

.spui-input:focus-visible {
  border-color: var(--ring);
  outline: var(--focus-ring-width) solid var(--ring);
  outline-offset: 0;
}

.spui-input[aria-invalid="true"],
.spui-input.spui-input--invalid {
  border-color: var(--destructive);
}

.spui-input[aria-invalid="true"]:focus-visible,
.spui-input.spui-input--invalid:focus-visible {
  outline-color: var(--destructive);
}

.spui-input--sm {
  height: var(--control-height-sm);
  font-size: var(--font-size-xs);
}

.spui-input--lg {
  height: var(--control-height-lg);
  font-size: var(--font-size-base);
}

textarea.spui-input {
  height: auto;
  min-height: 5rem;
  padding: var(--space-2) var(--space-3);
  resize: vertical;
}

.spui-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1-5);
}

.spui-field__hint,
.spui-field__error {
  font-size: var(--font-size-xs);
  line-height: var(--line-height-normal);
}

.spui-field__hint {
  color: var(--muted-foreground);
}

.spui-field__error {
  color: var(--destructive);
}

/* ==========================================================================
   8. Select / dropdown (native + custom listbox basis)
   ========================================================================== */

.spui-select {
  display: flex;
  width: 100%;
  height: var(--control-height-md);
  padding: 0 var(--space-8) 0 var(--space-3);
  border: 1px solid var(--input);
  border-radius: var(--radius-md);
  background-color: transparent;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23737373' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 1rem;
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  appearance: none;
  cursor: pointer;
  transition:
    border-color var(--duration-fast) var(--ease-default),
    box-shadow var(--duration-fast) var(--ease-default);
}

.spui-select:focus-visible {
  border-color: var(--ring);
  outline: var(--focus-ring-width) solid var(--ring);
  outline-offset: 0;
}

/* Custom dropdown panel (gebruik met JS of details/summary) */
.spui-dropdown {
  position: relative;
  display: inline-block;
}

.spui-dropdown__menu {
  position: absolute;
  top: calc(100% + var(--space-1));
  left: 0;
  z-index: var(--z-dropdown);
  min-width: 12rem;
  padding: var(--space-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background-color: var(--popover);
  color: var(--popover-foreground);
  box-shadow: var(--shadow-md);
}

.spui-dropdown__menu[hidden] {
  display: none;
}

.spui-dropdown__item {
  display: flex;
  align-items: center;
  width: 100%;
  padding: var(--space-1-5) var(--space-2);
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: inherit;
  font-size: var(--font-size-sm);
  text-align: left;
  cursor: pointer;
}

.spui-dropdown__item:hover,
.spui-dropdown__item:focus-visible,
.spui-dropdown__item[aria-selected="true"] {
  background-color: var(--accent);
  color: var(--accent-foreground);
  outline: none;
}

.spui-dropdown__separator {
  height: 1px;
  margin: var(--space-1) 0;
  background-color: var(--border);
  border: 0;
}

/* ==========================================================================
   9. Card
   ========================================================================== */

.spui-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-6);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background-color: var(--card);
  color: var(--card-foreground);
  box-shadow: var(--shadow-xs);
}

.spui-card__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-1-5);
}

.spui-card__title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

.spui-card__description {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--muted-foreground);
  line-height: var(--line-height-normal);
}

.spui-card__content {
  font-size: var(--font-size-sm);
}

.spui-card__footer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: auto;
}

/* ==========================================================================
   10. Badge
   ========================================================================== */

.spui-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.125rem 0.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background-color: var(--primary);
  color: var(--primary-foreground);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  white-space: nowrap;
}

.spui-badge--secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
}

.spui-badge--outline {
  background-color: transparent;
  color: var(--foreground);
  border-color: var(--border);
}

.spui-badge--destructive {
  background-color: var(--destructive);
  color: var(--destructive-foreground);
}

.spui-badge--muted {
  background-color: var(--muted);
  color: var(--muted-foreground);
}

.spui-badge--success {
  background-color: var(--success);
  color: var(--success-foreground);
}

/* ==========================================================================
   11. Alert
   ========================================================================== */

.spui-alert {
  position: relative;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background-color: var(--background);
  color: var(--foreground);
}

.spui-alert__title {
  margin: 0 0 var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
}

.spui-alert__description {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--muted-foreground);
  line-height: var(--line-height-relaxed);
}

.spui-alert--destructive {
  border-color: color-mix(in oklch, var(--destructive) 50%, var(--border));
  color: var(--destructive);
}

.spui-alert--destructive .spui-alert__description {
  color: color-mix(in oklch, var(--destructive) 90%, var(--foreground));
}

.spui-alert--success {
  border-color: color-mix(in oklch, var(--success) 50%, var(--border));
  color: var(--success);
}

.spui-alert--warning {
  border-color: color-mix(in oklch, var(--warning) 50%, var(--border));
  color: color-mix(in oklch, var(--warning) 70%, var(--foreground));
}

.spui-alert--info {
  border-color: color-mix(in oklch, var(--info) 50%, var(--border));
  color: var(--info);
}

/* ==========================================================================
   12. Dialog (basis — open via [open] of .spui-dialog--open)
   ========================================================================== */

.spui-dialog::backdrop {
  background-color: oklch(0 0 0 / 0.5);
}

.spui-dialog {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: none;
  place-items: center;
  width: min(100% - 2rem, 32rem);
  max-height: calc(100% - 2rem);
  margin: auto;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background-color: var(--background);
  color: var(--foreground);
  box-shadow: var(--shadow-lg);
  overflow: auto;
}

.spui-dialog[open],
.spui-dialog.spui-dialog--open {
  display: grid;
}

.spui-dialog__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-6);
}

.spui-dialog__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-1-5);
  padding-right: var(--space-8);
}

.spui-dialog__title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.spui-dialog__description {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--muted-foreground);
}

.spui-dialog__footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-2);
}

.spui-dialog__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted-foreground);
  cursor: pointer;
}

.spui-dialog__close:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

/* Non-<dialog> overlay variant */
.spui-dialog-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal-backdrop);
  display: none;
  place-items: center;
  padding: var(--space-4);
  background-color: oklch(0 0 0 / 0.5);
}

.spui-dialog-overlay[open],
.spui-dialog-overlay.spui-dialog-overlay--open {
  display: grid;
}

.spui-dialog-overlay .spui-dialog__panel {
  position: relative;
  width: min(100%, 32rem);
  max-height: calc(100vh - 2rem);
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background-color: var(--background);
  color: var(--foreground);
  box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   13. Tabs
   ========================================================================== */

.spui-tabs {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.spui-tabs__list {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  width: fit-content;
  max-width: 100%;
  padding: var(--space-1);
  border-radius: var(--radius-lg);
  background-color: var(--muted);
  color: var(--muted-foreground);
  overflow-x: auto;
}

.spui-tabs__trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1-5);
  height: 2rem;
  padding: 0 var(--space-3);
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: inherit;
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--duration-fast) var(--ease-default),
    color var(--duration-fast) var(--ease-default),
    box-shadow var(--duration-fast) var(--ease-default);
}

.spui-tabs__trigger:hover:not(:disabled) {
  color: var(--foreground);
}

.spui-tabs__trigger[aria-selected="true"],
.spui-tabs__trigger.spui-tabs__trigger--active {
  background-color: var(--background);
  color: var(--foreground);
  box-shadow: var(--shadow-xs);
}

.spui-tabs__panel {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

.spui-tabs__panel[hidden] {
  display: none;
}

/* ==========================================================================
   14. Utilities (minimale set)
   ========================================================================== */

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

.spui-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.spui-stack--sm {
  gap: var(--space-2);
}

.spui-stack--lg {
  gap: var(--space-6);
}

.spui-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.spui-row--gap-4 {
  gap: var(--space-4);
}

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

.spui-text-sm {
  font-size: var(--font-size-sm);
}

.spui-text-xs {
  font-size: var(--font-size-xs);
}

.spui-fw-medium {
  font-weight: var(--font-weight-medium);
}

.spui-fw-semibold {
  font-weight: var(--font-weight-semibold);
}

.spui-mt-0 { margin-top: 0; }
.spui-mb-0 { margin-bottom: 0; }
.spui-mt-2 { margin-top: var(--space-2); }
.spui-mt-4 { margin-top: var(--space-4); }
.spui-mb-4 { margin-bottom: var(--space-4); }

.spui-w-full {
  width: 100%;
}

.spui-max-w-sm {
  max-width: 24rem;
}

.spui-max-w-md {
  max-width: 28rem;
}

.spui-border {
  border: 1px solid var(--border);
}

.spui-rounded {
  border-radius: var(--radius-md);
}

.spui-rounded-lg {
  border-radius: var(--radius-lg);
}

.spui-bg-muted {
  background-color: var(--muted);
}

.spui-p-4 {
  padding: var(--space-4);
}

.spui-p-6 {
  padding: var(--space-6);
}

/* ==========================================================================
   15. Responsive helpers
   ========================================================================== */

@media (max-width: 640px) {
  .spui-card {
    padding: var(--space-4);
  }

  .spui-dialog__footer,
  .spui-card__footer {
    flex-direction: column;
    align-items: stretch;
  }

  .spui-dialog__footer .spui-button,
  .spui-card__footer .spui-button {
    width: 100%;
  }

  .spui-tabs__list {
    width: 100%;
    justify-content: stretch;
  }

  .spui-tabs__trigger {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .spui-button,
  .spui-input,
  .spui-select,
  .spui-tabs__trigger {
    transition: none;
  }
}

/* ==========================================================================
   16. Experimental (opt-in) — niet onderdeel van het stabiele v1-contract
   Prefix: .spui-exp-* — kan wijzigen zonder major version bump.
   ========================================================================== */

.spui-exp-skeleton {
  display: block;
  width: 100%;
  height: 1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(
    90deg,
    var(--muted) 25%,
    color-mix(in oklch, var(--muted) 60%, var(--background)) 50%,
    var(--muted) 75%
  );
  background-size: 200% 100%;
  animation: spui-exp-shimmer 1.2s var(--ease-default) infinite;
}

@keyframes spui-exp-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .spui-exp-skeleton {
    animation: none;
  }
}
