/* ============================================================
   splitify-design.css — Splitify design-system
   ----------------------------------------------------------------
   Centrale CSS-file voor alle tool-pagina's. Bevat:
     1. Design tokens   (kleuren, typografie, spacing, radii, shadows)
     2. Reset + base
     3. Layout utilities (.container, .sd-grid, .sd-flex)
     4. Components       (button, card, input, alert, badge, stat,
                          hero, search, lead, feature, data-row,
                          chip, section)
     5. Utilities        (margin/padding, text-*, flex-gap)
     6. Nav + footer     (data-sd-nav / data-sd-footer mounts)
     7. Responsive       (max-width 800/600/440 breakpoints)

   Naming-conventie: BEM-achtig met `sd-` prefix.
     sd-component
     sd-component__element
     sd-component--modifier

   Design-feel: paars-primair (#6d28d9, zoals pand-context-v2 viewer),
                teal-secondary (#0d9488), oranje-accent (#f97316).
                Apple/Geist-stijl typografie met -apple-system + Geist.
   ============================================================ */

/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */
:root {
  /* === Splitify-merkkleuren === */
  --splitify-primary: #6d28d9;      /* paars — viewer-kleur */
  --splitify-primary-dark: #5b21b6;
  --splitify-primary-light: #8b5cf6;
  --splitify-primary-bg: #f5f3ff;   /* paars-tint achtergrond */
  --splitify-primary-border: #ddd6fe;

  --splitify-secondary: #0d9488;    /* teal — pand-context */
  --splitify-secondary-dark: #0f766e;
  --splitify-secondary-light: #14b8a6;
  --splitify-secondary-bg: #f0fdfa;

  --splitify-accent: #f97316;       /* oranje */
  --splitify-accent-dark: #ea580c;
  --splitify-accent-light: #fb923c;
  --splitify-accent-bg: #fff7ed;

  /* === Splitify-USP-kleuren (voor backwards-compat met oude vars) === */
  --splitify-blue: #6d28d9;         /* alias — sommige pages gebruiken --splitify-blue */
  --splitify-green: #0d9488;        /* alias */

  /* === Semantic colors === */
  --green: #16a34a;
  --green-light: #22c55e;
  --green-dark: #15803d;
  --green-bg: #f0fdf4;
  --green-border: #bbf7d0;

  --red: #dc2626;
  --red-light: #ef4444;
  --red-dark: #b91c1c;
  --red-bg: #fef2f2;
  --red-border: #fecaca;

  --orange: #ea580c;
  --orange-light: #f97316;
  --orange-bg: #fff7ed;
  --orange-border: #fed7aa;

  --yellow: #ca8a04;
  --yellow-bg: #fefce8;

  --blue: #2563eb;
  --blue-bg: #eff6ff;

  --purple: #7c3aed;
  --purple-bg: #f5f3ff;

  /* === Neutrals === */
  --bg: #ffffff;
  --bg-2: #f8fafc;
  --bg2: #f8fafc;                    /* alias */
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --paper: #ffffff;
  --card: #ffffff;
  --text: #0f172a;
  --text-2: #475569;
  --text-3: #64748b;
  --text2: #475569;                  /* alias */
  --text3: #64748b;                  /* alias */
  --ink: #0f172a;
  --muted: #64748b;
  --fg: #0f172a;
  --border: #e5e7eb;
  --rule: #e5e7eb;
  --color-border: #e5e7eb;
  --color-surface: #ffffff;
  --color-text-secondary: #475569;
  --color-text-faint: #94a3b8;
  --color-primary: var(--splitify-primary);

  /* Accent backwards-compat (oude templates gebruiken --accent) */
  --accent: var(--splitify-primary);
  --accent-bg: var(--splitify-primary-bg);
  --accent-border: var(--splitify-primary-border);
  --primary: var(--splitify-primary);
  --primary-light: var(--splitify-primary-light);
  --gold: var(--splitify-accent);

  /* === Typography === */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Geist', 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SF Mono', 'Menlo', 'Consolas', monospace;
  --font-body: var(--font-sans);
  --font-display: var(--font-sans);

  /* Font-sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 1.875rem;
  --text-3xl: 2.25rem;
  --text-4xl: 3rem;

  /* === Spacing-scale (4px base) === */
  --space-1: 0.25rem;   /*  4px */
  --space-2: 0.5rem;    /*  8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */

  /* === Radii === */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* === Shadows === */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.10), 0 4px 12px rgba(15, 23, 42, 0.06);

  /* === Transitions === */
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --easing: cubic-bezier(0.4, 0, 0.2, 1);
  --easing-pop: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);

  /* === Layout === */
  --header-height: 60px;
  --container-max: 1200px;
  --container-narrow: 720px;

  /* Code blocks */
  --code-bg: #f1f5f9;
  --code-fg: #0f172a;

  /* Netbeheerder-kleuren (worden in tool-pagina's gebruikt) */
  --liander: #00b3a4;
  --stedin: #00a3e0;
  --enexis: #ed1c24;
}

/* ============================================================
   2. RESET + BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--splitify-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--splitify-primary-dark); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}

h1 { font-size: var(--text-4xl); font-weight: 700; }
h2 { font-size: var(--text-3xl); font-weight: 700; }
h3 { font-size: var(--text-xl); font-weight: 600; }
h4 { font-size: var(--text-lg); font-weight: 600; }

p { color: var(--text-2); }

button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }

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

:focus-visible {
  outline: 2px solid var(--splitify-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   3. LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.sd-grid { display: grid; gap: var(--space-6); }
.sd-grid--2 { grid-template-columns: repeat(2, 1fr); }
.sd-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sd-grid--4 { grid-template-columns: repeat(4, 1fr); }

.sd-flex { display: flex; align-items: center; gap: var(--space-3); }
.sd-flex--col { flex-direction: column; align-items: stretch; }
.sd-flex--between { justify-content: space-between; }
.sd-flex--center { justify-content: center; }
.sd-flex--wrap { flex-wrap: wrap; }

@media (max-width: 800px) {
  .sd-grid--2,
  .sd-grid--3,
  .sd-grid--4 { grid-template-columns: 1fr; }
}

/* ============================================================
   4. COMPONENTS
   ============================================================ */

/* ---------- Buttons ---------- */
.btn,
.sd-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast),
              color var(--transition-fast), transform var(--transition-fast),
              box-shadow var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}
.btn:focus-visible,
.sd-btn:focus-visible { outline: 2px solid var(--splitify-primary); outline-offset: 2px; }

.btn-primary,
.sd-btn--primary {
  background: var(--splitify-primary);
  color: #fff;
  border-color: var(--splitify-primary);
}
.btn-primary:hover,
.sd-btn--primary:hover {
  background: var(--splitify-primary-dark);
  border-color: var(--splitify-primary-dark);
  color: #fff;
}

.btn-secondary,
.sd-btn--secondary {
  background: var(--splitify-secondary);
  color: #fff;
  border-color: var(--splitify-secondary);
}
.btn-secondary:hover,
.sd-btn--secondary:hover {
  background: var(--splitify-secondary-dark);
  color: #fff;
}

.btn-accent,
.sd-btn--accent {
  background: var(--splitify-accent);
  color: #fff;
  border-color: var(--splitify-accent);
}
.btn-accent:hover,
.sd-btn--accent:hover {
  background: var(--splitify-accent-dark);
  color: #fff;
}

.btn-outline,
.sd-btn--outline {
  background: transparent;
  color: var(--splitify-primary);
  border-color: var(--border);
}
.btn-outline:hover,
.sd-btn--outline:hover {
  background: var(--splitify-primary-bg);
  border-color: var(--splitify-primary);
  color: var(--splitify-primary-dark);
}

.btn-ghost,
.sd-btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: transparent;
}
.btn-ghost:hover,
.sd-btn--ghost:hover {
  background: var(--bg-2);
}

.btn-lg,
.sd-btn--lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-md);
}

.btn-sm,
.sd-btn--sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.btn[disabled],
.sd-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---------- Card ---------- */
.card,
.sd-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}
a.sd-card:hover,
a.card:hover { border-color: var(--splitify-primary); box-shadow: var(--shadow-md); }

.card-header,
.sd-card__header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.card-body,
.sd-card__body { color: var(--text-2); }

.sd-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.015em;
}

.sd-card__sub {
  font-size: var(--text-sm);
  color: var(--text-2);
  line-height: 1.55;
}

/* ---------- Input + label + form ---------- */
.label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text);
  margin-bottom: var(--space-2);
}

.input {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  font-family: inherit;
}
.input:focus {
  outline: none;
  border-color: var(--splitify-primary);
  box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.12);
}
.input:disabled { background: var(--bg-2); opacity: 0.7; }

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

/* ---------- Alert ---------- */
.alert,
.sd-alert {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius);
  border: 1px solid;
  font-size: var(--text-sm);
  line-height: 1.55;
}
.sd-alert > span:first-child { flex-shrink: 0; line-height: 1.4; font-size: 1.1em; }
.sd-alert div { flex: 1; }
.sd-alert strong { color: inherit; }

.alert-info,
.sd-alert--info {
  background: var(--blue-bg);
  border-color: #bfdbfe;
  color: #1e40af;
}
.alert-warning,
.sd-alert--warning,
.sd-alert--orange {
  background: var(--orange-bg);
  border-color: var(--orange-border);
  color: #9a3412;
}
.alert-error,
.sd-alert--error,
.sd-alert--red {
  background: var(--red-bg);
  border-color: var(--red-border);
  color: #991b1b;
}
.alert-success,
.sd-alert--success,
.sd-alert--green {
  background: var(--green-bg);
  border-color: var(--green-border);
  color: var(--green-dark);
}

/* ---------- Badge / chip ---------- */
.badge,
.sd-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  background: var(--bg-2);
  color: var(--text-2);
  border: 1px solid var(--border);
}
.badge-primary  { background: var(--splitify-primary-bg); color: var(--splitify-primary-dark); border-color: var(--splitify-primary-border); }
.badge-success  { background: var(--green-bg); color: var(--green-dark); border-color: var(--green-border); }
.badge-warning  { background: var(--orange-bg); color: #9a3412; border-color: var(--orange-border); }
.badge-error    { background: var(--red-bg); color: #991b1b; border-color: var(--red-border); }

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: var(--space-16) 0 var(--space-12);
}

.hero__title,
.sd-hero__title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-4);
  color: var(--text);
}

.hero__sub,
.sd-hero__sub {
  font-size: var(--text-md);
  color: var(--text-2);
  max-width: 640px;
  margin: 0 auto var(--space-8);
  line-height: 1.6;
}

.sd-hero__eyebrow,
.hero__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--splitify-primary);
  margin-bottom: var(--space-4);
}

.hero__lede {
  font-size: var(--text-md);
  color: var(--text-2);
  max-width: 640px;
  margin: 0 auto var(--space-8);
  line-height: 1.6;
}

/* ---------- Section ---------- */
.sd-section {
  padding: var(--space-16) 0;
}
.sd-section--tight { padding: var(--space-10) 0; }

.sd-section__head {
  text-align: center;
  margin-bottom: var(--space-10);
}

.sd-section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--splitify-primary);
  margin-bottom: var(--space-3);
}

.sd-section__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: var(--space-2);
  line-height: 1.15;
  text-align: center;
}

.sd-section__sub {
  font-size: var(--text-md);
  color: var(--text-2);
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
  line-height: 1.6;
}

/* ---------- Search ---------- */
.sd-search {
  position: relative;
  width: 100%;
}

.sd-search__field {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.sd-search__field:focus-within {
  border-color: var(--splitify-primary);
  box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.12), var(--shadow-sm);
}

.sd-search__icon { color: var(--text-3); flex-shrink: 0; }

.sd-search__input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--text-md);
  color: var(--text);
  min-width: 0;
}
.sd-search__input::placeholder { color: var(--text-3); }

.sd-search__spinner {
  width: 16px; height: 16px; flex-shrink: 0;
  border: 2px solid var(--border);
  border-top-color: var(--splitify-primary);
  border-radius: 50%;
  animation: sd-spin 0.7s linear infinite;
  display: none;
}
.sd-search.is-loading .sd-search__spinner { display: block; }
@keyframes sd-spin { to { transform: rotate(360deg); } }

.sd-search__dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  max-height: 320px;
  overflow-y: auto;
  z-index: 10;
  display: none;
}
.sd-search__dropdown.open { display: block; }
.sd-search__item {
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--bg-2);
  transition: background var(--transition-fast);
}
.sd-search__item:last-child { border-bottom: none; }
.sd-search__item:hover,
.sd-search__item.active { background: var(--splitify-primary-bg); }

/* ---------- Feature card (link tile) ---------- */
.sd-feature {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
              transform var(--transition-fast);
}
.sd-feature:hover {
  border-color: var(--splitify-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: inherit;
}
.sd-feature__icon { font-size: 1.75rem; line-height: 1; }
.sd-feature__title {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text);
}
.sd-feature__desc {
  font-size: var(--text-sm);
  color: var(--text-2);
  line-height: 1.55;
}

/* ---------- Data row (key/value) ---------- */
.sd-data {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-2);
  border-radius: var(--radius);
  min-width: 0;
}
.sd-data__label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.sd-data__value {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text);
  word-break: break-word;
}

/* ---------- Stats (group) ---------- */
.sd-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.sd-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  text-align: center;
}
.sd-stat__num {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1;
}
.sd-stat__label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ---------- Lead-form (newsletter / contact) ---------- */
.sd-lead {
  background: linear-gradient(135deg, var(--splitify-primary-bg) 0%, var(--splitify-secondary-bg) 100%);
  border: 1px solid var(--splitify-primary-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.sd-lead__title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-2);
}
.sd-lead__sub {
  font-size: var(--text-sm);
  color: var(--text-2);
  margin-bottom: var(--space-5);
}
.sd-lead__form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
  margin: 0 auto;
}
.sd-lead__input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  background: var(--surface);
  color: var(--text);
}
.sd-lead__input:focus {
  outline: none;
  border-color: var(--splitify-primary);
  box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.12);
}
.sd-lead__submit {
  padding: var(--space-3) var(--space-5);
  background: var(--splitify-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.sd-lead__submit:hover { background: var(--splitify-primary-dark); }

@media (max-width: 600px) {
  .sd-lead__form { flex-direction: column; }
}

/* ============================================================
   5. UTILITIES (Tailwind-light)
   ============================================================ */

/* Margin top */
.sd-mt-1 { margin-top: var(--space-1); }
.sd-mt-2 { margin-top: var(--space-2); }
.sd-mt-3 { margin-top: var(--space-3); }
.sd-mt-4 { margin-top: var(--space-4); }
.sd-mt-6 { margin-top: var(--space-6); }
.sd-mt-8 { margin-top: var(--space-8); }
.sd-mt-10 { margin-top: var(--space-10); }
.sd-mt-12 { margin-top: var(--space-12); }

/* Margin bottom */
.sd-mb-1 { margin-bottom: var(--space-1); }
.sd-mb-2 { margin-bottom: var(--space-2); }
.sd-mb-3 { margin-bottom: var(--space-3); }
.sd-mb-4 { margin-bottom: var(--space-4); }
.sd-mb-6 { margin-bottom: var(--space-6); }
.sd-mb-8 { margin-bottom: var(--space-8); }
.sd-mb-10 { margin-bottom: var(--space-10); }
.sd-mb-12 { margin-bottom: var(--space-12); }

/* Gap */
.sd-gap-1 { gap: var(--space-1); }
.sd-gap-2 { gap: var(--space-2); }
.sd-gap-3 { gap: var(--space-3); }
.sd-gap-4 { gap: var(--space-4); }
.sd-gap-6 { gap: var(--space-6); }

/* Text */
.sd-text-2 { color: var(--text-2); }
.sd-text-3 { color: var(--text-3); }
.sd-text-sm { font-size: var(--text-sm); }
.sd-text-lg { font-size: var(--text-lg); line-height: 1.55; }
.sd-text-center { text-align: center; }
.sd-text-mono { font-family: var(--font-mono); }

/* Display */
.sd-hidden { display: none !important; }
.sd-block { display: block; }
.sd-inline-block { display: inline-block; }

/* ============================================================
   6. NAV + FOOTER (data-sd-nav / data-sd-footer mounts)
   ----------------------------------------------------------------
   `splitify-shared.js` injecteert nav/footer in deze containers.
   Dit zijn defensieve fallback-styles voor als JS uit staat.
   ============================================================ */

[data-sd-nav] {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.sd-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding-inline: var(--space-6);
  max-width: var(--container-max);
  margin-inline: auto;
}

.sd-nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-md);
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.sd-nav__brand:hover { color: var(--splitify-primary); }

.sd-nav__brand-mark {
  width: 28px; height: 28px;
  border-radius: var(--radius);
  background: var(--splitify-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.sd-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.sd-nav__link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-2);
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.sd-nav__link:hover {
  background: var(--bg-2);
  color: var(--text);
}
.sd-nav__link--active {
  color: var(--splitify-primary);
  background: var(--splitify-primary-bg);
}

@media (max-width: 800px) {
  .sd-nav__links { display: none; }
}

[data-sd-footer] {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  margin-top: var(--space-16);
}

.sd-footer {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-12) var(--space-6);
}

.sd-footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}
@media (max-width: 800px) {
  .sd-footer__grid { grid-template-columns: 1fr; }
}

.sd-footer__brand {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}
.sd-footer__about {
  font-size: var(--text-sm);
  color: var(--text-2);
  line-height: 1.55;
  max-width: 320px;
}
.sd-footer__col-title {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: var(--space-3);
}
.sd-footer__links { list-style: none; padding: 0; }
.sd-footer__links li { margin-bottom: var(--space-2); }
.sd-footer__links a {
  font-size: var(--text-sm);
  color: var(--text-2);
  text-decoration: none;
}
.sd-footer__links a:hover { color: var(--splitify-primary); }

.sd-footer__bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--text-3);
}

/* ============================================================
   7. RESPONSIVE
   ============================================================ */
@media (max-width: 600px) {
  .container { padding-inline: var(--space-4); }
  .hero { padding: var(--space-10) 0 var(--space-8); }
  .sd-section { padding: var(--space-10) 0; }
  h1, .hero__title, .sd-hero__title { font-size: 2rem; }
  h2, .sd-section__title { font-size: 1.5rem; }
}

@media (max-width: 440px) {
  .sd-search__field { padding: var(--space-2) var(--space-3); }
  .sd-search__input { font-size: var(--text-sm); }
}

/* ============================================================
   8. EXTENDED COMPONENTS (E.3, mei 2026)
   ----------------------------------------------------------------
   Toegevoegd tijdens E.3 design-system uitbouw.
   Bevat: modal, select, textarea, danger-button, grid-cols-1..6,
   neutral-scale, dark-mode tokens, sticky-header utilities.
   Alle nieuwe classes met `sd-` prefix; oude classes blijven werken.
   ============================================================ */

/* ---------- Neutral scale (50..900) als formele tokens ----------
   Maakt mapping naar palette-systemen makkelijker (Figma, Tailwind-import). */
:root {
  --neutral-50:  #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;

  /* Aliassen voor primary-shades 50..900 (paars) */
  --primary-50:  #f5f3ff;
  --primary-100: #ede9fe;
  --primary-200: #ddd6fe;
  --primary-300: #c4b5fd;
  --primary-400: #a78bfa;
  --primary-500: #8b5cf6;
  --primary-600: #7c3aed;
  --primary-700: #6d28d9;
  --primary-800: #5b21b6;
  --primary-900: #4c1d95;

  /* Semantic alias-tokens (Walter-stijl) */
  --secondary: var(--splitify-secondary);
  --success: var(--green);
  --warning: var(--orange);
  --danger: var(--red);

  /* Breakpoint-tokens (informatief, voor JS-readers / docs) */
  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;
}

/* ---------- Buttons: extra modifiers ---------- */
.btn-danger,
.sd-btn--danger {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}
.btn-danger:hover,
.sd-btn--danger:hover {
  background: var(--red-dark);
  border-color: var(--red-dark);
  color: #fff;
}

.btn-success,
.sd-btn--success {
  background: var(--green);
  color: #fff;
  border-color: var(--green);
}
.btn-success:hover,
.sd-btn--success:hover {
  background: var(--green-dark);
  border-color: var(--green-dark);
  color: #fff;
}

/* ---------- Form: select + textarea ----------
   Styling matcht .input voor consistente look/feel. */
.select,
.sd-select {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-9, 36px) var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  background-size: 12px 8px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.select:focus,
.sd-select:focus {
  outline: none;
  border-color: var(--splitify-primary);
  box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.12);
}
.select:disabled,
.sd-select:disabled { background-color: var(--bg-2); opacity: 0.7; cursor: not-allowed; }

.textarea,
.sd-textarea {
  display: block;
  width: 100%;
  min-height: 96px;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  resize: vertical;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.textarea:focus,
.sd-textarea:focus {
  outline: none;
  border-color: var(--splitify-primary);
  box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.12);
}

/* ---------- Modal + overlay ----------
   Pure-CSS toggling via [open] of .is-open op .sd-modal. */
.sd-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.sd-modal-overlay.is-open,
.sd-modal-overlay[open] {
  opacity: 1;
  pointer-events: auto;
}

.sd-modal {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: calc(100vh - var(--space-8));
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(8px) scale(0.98);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  opacity: 0;
}
.sd-modal-overlay.is-open .sd-modal,
.sd-modal-overlay[open] .sd-modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.sd-modal--lg { max-width: 800px; }
.sd-modal--sm { max-width: 400px; }

.sd-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sd-modal__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text);
  margin: 0;
}
.sd-modal__close {
  background: transparent;
  border: none;
  padding: var(--space-2);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-3);
  transition: background var(--transition-fast), color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.sd-modal__close:hover {
  background: var(--bg-2);
  color: var(--text);
}
.sd-modal__body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
  color: var(--text-2);
  line-height: 1.55;
}
.sd-modal__footer {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  flex-shrink: 0;
}

/* ---------- Grid-cols ----------
   sd-grid-cols-N voor expliciete kolom-counts. */
.sd-grid-cols-1 { grid-template-columns: 1fr; }
.sd-grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.sd-grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.sd-grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.sd-grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
.sd-grid-cols-6 { grid-template-columns: repeat(6, 1fr); }

@media (max-width: 1024px) {
  .sd-grid-cols-5,
  .sd-grid-cols-6 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .sd-grid-cols-3,
  .sd-grid-cols-4,
  .sd-grid-cols-5,
  .sd-grid-cols-6 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .sd-grid-cols-2,
  .sd-grid-cols-3,
  .sd-grid-cols-4,
  .sd-grid-cols-5,
  .sd-grid-cols-6 { grid-template-columns: 1fr; }
}

/* ---------- Flex-utilities (extra) ---------- */
.sd-flex-between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.sd-flex-center  { display: flex; align-items: center; justify-content: center; gap: var(--space-3); }
.sd-flex-start   { display: flex; align-items: center; justify-content: flex-start; gap: var(--space-3); }
.sd-flex-end     { display: flex; align-items: center; justify-content: flex-end; gap: var(--space-3); }
.sd-flex-col     { display: flex; flex-direction: column; gap: var(--space-3); }
.sd-flex-wrap    { flex-wrap: wrap; }

/* ---------- Padding utilities ---------- */
.sd-p-0 { padding: 0; }
.sd-p-2 { padding: var(--space-2); }
.sd-p-3 { padding: var(--space-3); }
.sd-p-4 { padding: var(--space-4); }
.sd-p-5 { padding: var(--space-5); }
.sd-p-6 { padding: var(--space-6); }
.sd-p-8 { padding: var(--space-8); }
.sd-px-4 { padding-inline: var(--space-4); }
.sd-py-4 { padding-block: var(--space-4); }
.sd-py-8 { padding-block: var(--space-8); }

/* ---------- Width helpers ---------- */
.sd-w-full { width: 100%; }
.sd-max-w-md { max-width: 480px; }
.sd-max-w-lg { max-width: 720px; }

/* ---------- Sticky header ---------- */
.sd-sticky-top {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

/* ---------- Skeleton (shimmer loader) ----------
   Bestond ad-hoc op pand-cockpit; nu centraal. */
.sd-skeleton {
  background: linear-gradient(90deg, var(--neutral-200) 0%, var(--neutral-100) 50%, var(--neutral-200) 100%);
  background-size: 200% 100%;
  animation: sd-shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
  display: block;
}
@keyframes sd-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---------- Responsive breakpoints (extra) ----------
   Officiële Splitify-breakpoints: 640 / 768 / 1024 / 1280. */
@media (max-width: 1280px) {
  /* xl: large desktop drop */
}
@media (max-width: 1024px) {
  /* lg: tablet landscape */
  .container { padding-inline: var(--space-5); }
}
@media (max-width: 768px) {
  /* md: tablet portrait */
  .sd-grid--3, .sd-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .sd-modal { max-width: 100%; }
}
@media (max-width: 640px) {
  /* sm: phones */
  .sd-grid--2, .sd-grid--3, .sd-grid--4 { grid-template-columns: 1fr; }
  .sd-modal__header { padding: var(--space-4); }
  .sd-modal__body { padding: var(--space-4); }
  .sd-modal__footer { padding: var(--space-3) var(--space-4); flex-wrap: wrap; }
}

/* ---------- Dark-mode tokens (auto) ----------
   Activeert via OS-voorkeur; pages opt-in door geen [data-theme="light"] hard te zetten.
   Defensief: alleen wijziging van surface/text-tokens; merkkleuren blijven gelijk. */
@media (prefers-color-scheme: dark) {
  :root.sd-dark-auto,
  [data-theme="auto"] {
    --bg: #0b1020;
    --bg-2: #11172a;
    --surface: #11172a;
    --surface-2: #1a2238;
    --paper: #11172a;
    --card: #11172a;
    --text: #f8fafc;
    --text-2: #cbd5e1;
    --text-3: #94a3b8;
    --border: #1e293b;
    --rule: #1e293b;
    --code-bg: #1a2238;
    --code-fg: #f8fafc;
  }
}