/* =========================================================================
   Olaf Minten Architectuur — shared design system
   Dark editorial "ink & sand" foundation used by every page of the site.
   Sections:
     1. Design tokens (colour, type, spacing, radius, shadow, motion)
     2. Reset & base typography
     3. Layout primitives (container, grid, flex, section, stack)
     4. Components (buttons, cards, chips, forms, stats, accordion)
     5. Site chrome (header, nav, mobile toggle, footer)
     6. Motion / animation utilities
     7. Responsive refinements
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. DESIGN TOKENS
   ------------------------------------------------------------------------- */
:root {
  /* --- Colour palette (oklch with hex fallbacks for older engines) --- */
  --background: oklch(16% 0.005 60);
  --background-hex: #14120f;
  --foreground: oklch(95% 0.004 85);
  --foreground-hex: #f2f0ec;

  --surface: oklch(22% 0.006 60);
  --surface-hex: #1d1b18;
  --card: oklch(20% 0.006 60);
  --card-hex: #1a1815;
  --popover: oklch(20% 0.006 60);
  --muted: oklch(25% 0.006 60);
  --muted-hex: #22201c;
  --muted-foreground: oklch(70% 0.008 65);
  --muted-foreground-hex: #b0aca4;

  /* Single warm accent — used sparingly: eyebrows, italic words, links,
     active dots, focus rings, hover states. */
  --accent: oklch(68% 0.06 55);
  --accent-hex: #c08f63;
  --accent-foreground: oklch(16% 0.005 60);
  --secondary: oklch(30% 0.008 60);
  --secondary-foreground: oklch(95% 0.004 85);

  --primary: oklch(95% 0.004 85);
  --primary-hex: #f2f0ec;
  --primary-foreground: oklch(16% 0.005 60);

  --destructive: oklch(65% 0.19 22);
  --destructive-hex: #d15a4a;
  --success: oklch(70% 0.11 155);
  --warning: oklch(80% 0.13 80);

  --border: oklch(100% 0 0 / 0.1);
  --border-strong: oklch(100% 0 0 / 0.18);
  --input: oklch(100% 0 0 / 0.15);
  --ring: oklch(68% 0.06 55);
  --overlay: rgba(0, 0, 0, 0.8);
  --scrim: rgba(0, 0, 0, 0.5);
  --transparent: rgba(0, 0, 0, 0);

  /* --- Typography --- */
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --font-serif: Georgia, "Times New Roman", serif;
  --default-font-family: var(--font-sans);
  --default-mono-font-family: var(--font-mono);

  --text-2xs: 0.625rem;   /* 10px — mono eyebrows */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 1.875rem;   /* 30px */
  --text-4xl: 2.5rem;     /* 40px */
  --text-5xl: 3.25rem;    /* 52px */
  --text-6xl: 4.5rem;     /* 72px */

  --leading-none: 1;
  --leading-tight: 1.08;
  --leading-snug: 1.25;
  --leading-normal: 1.55;
  --leading-relaxed: 1.7;

  --tracking-tight: -0.022em;
  --tracking-normal: 0;
  --tracking-wide: 0.14em;
  --tracking-widest: 0.26em;

  /* --- Spacing scale (base unit --spacing = 0.25rem) --- */
  --spacing: 0.25rem;
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --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;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --gutter: var(--space-6);
  --section-y: var(--space-20);

  /* --- Radius, borders, elevation --- */
  --radius: 0.5rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.38);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.45);
  --shadow-focus: 0 0 0 3px oklch(68% 0.06 55 / 0.35);

  /* --- Blur --- */
  --blur-sm: 8px;
  --blur-md: 12px;
  --blur-lg: 20px;

  /* --- Layout --- */
  --container-max: 78rem;
  --container-prose: 46rem;
  --header-height: 4.25rem;

  /* --- Motion (matches reference: reveal-up / pulse / enter / exit /
         accordion-down / accordion-up / caret-blink) --- */
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  --duration-reveal: 700ms;
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* --- Layers --- */
  --z-base: 1;
  --z-sticky: 50;
  --z-overlay: 80;
  --z-cookie: 90;
  --z-toast: 100;

  color-scheme: dark;
}

/* -------------------------------------------------------------------------
   2. RESET & BASE
   ------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--space-4));
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--background-hex);
  background-color: var(--background);
  color: var(--foreground-hex);
  color: var(--foreground);
  font-family: var(--default-font-family, var(--font-sans));
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 500;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--foreground);
  text-wrap: balance;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin: 0 0 var(--space-4);
  color: var(--muted-foreground);
  line-height: var(--leading-relaxed);
}

p:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 0.22em;
  transition: color var(--duration-fast) var(--ease-standard),
              text-decoration-color var(--duration-fast) var(--ease-standard);
}

a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

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

ul, ol {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-5);
  color: var(--muted-foreground);
}

li { margin-bottom: var(--space-2); }
li:last-child { margin-bottom: 0; }

strong, b { font-weight: 600; color: var(--foreground); }

em, i {
  font-family: var(--font-serif);
  font-style: italic;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: var(--space-10) 0;
}

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

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--accent);
  color: var(--accent-foreground);
}

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

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

.section {
  padding-block: var(--section-y);
  position: relative;
}

.section--tight { padding-block: var(--space-12); }
.section--flush-top { padding-top: 0; }
.section--flush-bottom { padding-bottom: 0; }

.section--bordered {
  border-block: 1px solid var(--border);
}

.section--surface {
  background-color: var(--surface);
}

.section--card {
  background-color: var(--card);
}

/* Mobile-first grid: stacks, multi-column at 48rem+ */
.grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.grid--2,
.grid--3,
.grid--4,
.grid--12 {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.flex--center {
  align-items: center;
  justify-content: center;
}

.flex--between {
  align-items: center;
  justify-content: space-between;
}

.flex--column {
  flex-direction: column;
}

.stack > * + * { margin-top: var(--space-4); }
.stack--lg > * + * { margin-top: var(--space-8); }
.stack--sm > * + * { margin-top: var(--space-2); }

.split {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: 1fr;
  align-items: center;
}

.prose {
  max-width: 60ch;
  font-size: var(--text-lg);
}

.prose p { color: var(--muted-foreground); }

.text-center { text-align: center; }
.text-right { text-align: right; }
.mx-auto { margin-inline: auto; }
.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;
}

/* Typographic helpers */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--accent);
  margin-bottom: var(--space-4);
}

.label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--muted-foreground);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.serif-em {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--accent);
  letter-spacing: normal;
}

.lede {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--muted-foreground);
  max-width: 52ch;
}

.section-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.section-head {
  margin-bottom: var(--space-12);
  max-width: 60ch;
}

/* -------------------------------------------------------------------------
   4. COMPONENTS
   ------------------------------------------------------------------------- */

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.6rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  background: var(--muted);
  color: var(--foreground);
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}

.btn:hover {
  transform: translateY(-2px);
  color: var(--foreground);
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--primary);
  color: var(--primary-foreground);
  border-color: var(--primary);
}

.btn--primary:hover {
  background: var(--foreground);
  color: var(--primary-foreground);
}

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

.btn--secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--accent {
  background: var(--accent);
  color: var(--accent-foreground);
  border-color: var(--accent);
}

.btn--accent:hover {
  filter: brightness(1.08);
  color: var(--accent-foreground);
}

.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--muted-foreground);
  padding-inline: var(--space-3);
}

.btn--ghost:hover {
  color: var(--accent);
  box-shadow: none;
}

.btn--sm {
  padding: 0.55rem 1.1rem;
  font-size: var(--text-2xs);
}

.btn--lg {
  padding: 1.05rem 2.1rem;
  font-size: var(--text-sm);
}

.btn--block { width: 100%; }

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Underlined text link — pairs with filled pill CTAs */
.link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--foreground);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.35em;
  transition: color var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard);
}

.link:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
  transform: translateY(-1px);
}

/* --- Cards --- */
.card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  position: relative;
  transition: border-color var(--duration-base) var(--ease-standard),
              transform var(--duration-base) var(--ease-standard),
              box-shadow var(--duration-base) var(--ease-standard);
}

.card--interactive:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card--flat {
  background: transparent;
  border-color: var(--border);
}

.card--media {
  padding: 0;
  overflow: hidden;
}

.card__body { padding: var(--space-6); }
.card__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}
.card__text {
  font-size: var(--text-sm);
  color: var(--muted-foreground);
  margin: 0;
}
.card__meta {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.card--media img {
  width: 100%;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

/* --- Chips / badges --- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.45rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--muted-foreground);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard);
}

.chip:hover {
  color: var(--foreground);
  border-color: var(--border-strong);
}

.chip--active,
.chip[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-foreground);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--muted);
  color: var(--muted-foreground);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

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

/* --- Stat strip --- */
.stat-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8) var(--space-6);
  padding-block: var(--space-12);
  border-block: 1px solid var(--border);
}

.stat__value {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-3xl);
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
  color: var(--foreground);
  font-variant-numeric: tabular-nums;
}

.stat__label {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted-foreground);
}

/* --- Numbered process / timeline --- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--space-8);
  border-left: 1px solid var(--border);
  display: grid;
  gap: var(--space-10);
}

.step {
  position: relative;
}

.step__num {
  position: absolute;
  left: calc(-1 * var(--space-8) - 1.15rem);
  top: -0.15rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem;
  height: 2.3rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  background: var(--background);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  color: var(--accent);
}

.step__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.step__text {
  color: var(--muted-foreground);
  margin: 0;
  max-width: 56ch;
}

/* --- Forms --- */
.form {
  display: grid;
  gap: var(--space-5);
}

.field { display: grid; gap: var(--space-2); }

.label--field {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--muted-foreground);
}

.input,
.textarea,
.select {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--foreground);
  font-size: var(--text-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}

.textarea {
  min-height: 9rem;
  resize: vertical;
}

.input::placeholder,
.textarea::placeholder {
  color: var(--muted-foreground);
  opacity: 0.75;
}

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

.input:invalid:not(:placeholder-shown),
.textarea:invalid:not(:placeholder-shown) {
  border-color: var(--destructive);
}

.form__hint {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  color: var(--muted-foreground);
}

.form__error {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  color: var(--destructive);
}

.form__honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.checkbox,
.radio {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--muted-foreground);
}

/* --- Accordion --- */
.accordion {
  display: grid;
  gap: var(--space-4);
}

.accordion__item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
  padding: var(--space-5) var(--space-6);
  transition: border-color var(--duration-base) var(--ease-standard);
}

.accordion__item:hover { border-color: var(--border-strong); }

.accordion__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0;
  background: none;
  border: 0;
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 500;
  text-align: left;
  cursor: pointer;
}

.accordion__icon {
  flex: none;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.accordion__content {
  overflow: hidden;
  color: var(--muted-foreground);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.accordion__content[hidden] { display: none; }

.accordion__item[data-state="open"] .accordion__content {
  animation: accordion-down var(--duration-base) var(--ease-out);
}

.accordion__item[data-state="closed"] .accordion__content {
  animation: accordion-up var(--duration-base) var(--ease-in);
}

/* --- Callout / quote --- */
.callout {
  border-left: 2px solid var(--accent);
  background: var(--muted);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-6);
  color: var(--muted-foreground);
}

.quote {
  margin: 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-2xl);
  line-height: var(--leading-snug);
  color: var(--foreground);
}

.quote__cite {
  display: block;
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-style: normal;
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted-foreground);
}

/* --- Media frame --- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--4-3 { aspect-ratio: 4 / 3; }
.media--5-4 { aspect-ratio: 5 / 4; }
.media--4-5 { aspect-ratio: 4 / 5; }
.media--5-3 { aspect-ratio: 5 / 3; }
.media--16-9 { aspect-ratio: 16 / 9; }

/* -------------------------------------------------------------------------
   5. SITE CHROME — header, nav, footer (used verbatim on every page)
   ------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--background-hex);
  background-color: var(--background);
  background-color: oklch(16% 0.005 60 / 0.85);
  border-bottom: 1px solid var(--border);
  -webkit-backdrop-filter: blur(var(--blur-md));
  backdrop-filter: blur(var(--blur-md));
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-height);
}

.site-brand {
  display: inline-flex;
  flex-direction: column;
  gap: 0.1rem;
  text-decoration: none;
  line-height: 1.1;
}

.site-brand:hover { text-decoration: none; }

.site-brand-name {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--foreground);
}

.site-brand-tag {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--muted-foreground);
}

/* Mobile toggle — hidden on desktop */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 1.15rem;
  height: 1px;
  margin-inline: auto;
  background: var(--foreground);
  transition: transform var(--duration-base) var(--ease-standard),
              opacity var(--duration-fast) var(--ease-standard);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Nav — collapsed panel on small screens */
.site-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: none;
  padding: var(--space-4) var(--gutter) var(--space-6);
  background-color: var(--background-hex);
  background-color: var(--background);
  border-bottom: 1px solid var(--border);
  -webkit-backdrop-filter: blur(var(--blur-md));
  backdrop-filter: blur(var(--blur-md));
}

.site-nav[data-open="true"] { display: block; }

.site-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.nav-link {
  display: block;
  padding: var(--space-3) var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted-foreground);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard);
}

.nav-link:hover {
  color: var(--foreground);
  background: var(--muted);
  text-decoration: none;
}

.nav-link[aria-current="page"],
.nav-link--active {
  color: var(--accent);
}

.nav-link--cta {
  color: var(--accent);
  font-weight: 600;
}

.nav-link--cta:hover {
  color: var(--accent);
  background: var(--muted);
}

/* Footer */
.site-footer {
  margin-top: var(--space-24);
  border-top: 1px solid var(--border);
  background-color: var(--surface);
  padding-block: var(--space-16) var(--space-10);
}

.footer-grid {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: 1fr;
}

.footer-col { min-width: 0; }

.footer-title {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--muted-foreground);
  margin: 0 0 var(--space-4);
}

.footer-text {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--muted-foreground);
}

.footer-text:last-child { margin-bottom: 0; }

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.footer-link {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted-foreground);
  transition: color var(--duration-fast) var(--ease-standard);
}

.footer-link:hover { color: var(--accent); }

.footer-brand {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--foreground);
  margin: 0 0 var(--space-3);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

/* -------------------------------------------------------------------------
   6. MOTION
   ------------------------------------------------------------------------- */
@keyframes reveal-up {
  0% { opacity: 0; transform: translateY(24px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes enter {
  0% {
    opacity: var(--tw-enter-opacity, 0);
    transform: translate3d(var(--tw-enter-translate-x, 0), var(--tw-enter-translate-y, 24px), 0)
      scale3d(var(--tw-enter-scale, 1), var(--tw-enter-scale, 1), var(--tw-enter-scale, 1));
  }
  100% { opacity: 1; transform: translate3d(0, 0, 0) scale3d(1, 1, 1); }
}

@keyframes exit {
  0% { opacity: 1; transform: translate3d(0, 0, 0) scale3d(1, 1, 1); }
  100% {
    opacity: var(--tw-exit-opacity, 0);
    transform: translate3d(var(--tw-exit-translate-x, 0), var(--tw-exit-translate-y, -12px), 0)
      scale3d(var(--tw-exit-scale, 0.98), var(--tw-exit-scale, 0.98), var(--tw-exit-scale, 0.98));
  }
}

@keyframes accordion-down {
  0% { height: 0; opacity: 0; }
  100% { height: var(--accordion-content-height, auto); opacity: 1; }
}

@keyframes accordion-up {
  0% { height: var(--accordion-content-height, auto); opacity: 1; }
  100% { height: 0; opacity: 0; }
}

@keyframes caret-blink {
  0%, 70%, 100% { opacity: 1; }
  20%, 50% { opacity: 0; }
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Reusable motion classes */
.reveal,
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

.reveal.is-visible,
.fade-up.is-visible,
.reveal--visible,
.fade-up--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay helpers for staggered reveals */
.reveal--delay-1 { transition-delay: 80ms; }
.reveal--delay-2 { transition-delay: 160ms; }
.reveal--delay-3 { transition-delay: 240ms; }
.reveal--delay-4 { transition-delay: 320ms; }

.animate-reveal {
  animation: reveal-up var(--duration-reveal) var(--ease-out) both;
}

.animate-fade {
  animation: fade-in var(--duration-slow) var(--ease-out) both;
}

.animate-pulse {
  animation: pulse 2s var(--ease-in-out) infinite;
}

.animate-enter {
  animation: enter var(--duration-slow) var(--ease-out) both;
}

.animate-exit {
  animation: exit var(--duration-base) var(--ease-in) both;
}

.caret {
  display: inline-block;
  width: 0.5ch;
  margin-left: 0.15em;
  background: var(--accent);
  animation: caret-blink 1.2s steps(1, end) infinite;
}

.marquee {
  display: flex;
  overflow: hidden;
  gap: var(--space-10);
  white-space: nowrap;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.marquee__track {
  display: flex;
  flex: none;
  gap: var(--space-10);
  align-items: center;
  min-width: 100%;
  animation: marquee 32s linear infinite;
}

.marquee:hover .marquee__track { animation-play-state: paused; }

/* Micro-interactions */
.hover-lift {
  transition: transform var(--duration-base) var(--ease-standard),
              box-shadow var(--duration-base) var(--ease-standard);
}

.hover-lift:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.crossfade img {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-standard);
}

.crossfade img.is-active { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .fade-up {
    opacity: 1;
    transform: none;
  }
}

/* -------------------------------------------------------------------------
   7. RESPONSIVE — mobile first, larger screens get more room
   ------------------------------------------------------------------------- */
@media (min-width: 48rem) {
  :root {
    --gutter: var(--space-10);
    --section-y: var(--space-24);
    --header-height: 4.75rem;
    --text-4xl: 3.25rem;
    --text-5xl: 4.25rem;
    --text-6xl: 5.5rem;
  }

  h1 { font-size: var(--text-5xl); }
  h2 { font-size: var(--text-4xl); }
  h3 { font-size: var(--text-3xl); }

  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .grid--12 {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .col-4 { grid-column: span 4; }
  .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 7; }
  .col-8 { grid-column: span 8; }
  .col-12 { grid-column: span 12; }

  .split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
    gap: var(--space-16);
  }
  .split--5-7 {
    grid-template-columns: 5fr 7fr;
  }
  .split--4-8 {
    grid-template-columns: 4fr 8fr;
  }
  .split--7-5 {
    grid-template-columns: 7fr 5fr;
  }

  .stat-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
  }

  /* Desktop nav: inline links, no hamburger */
  .nav-toggle { display: none; }

  .site-nav {
    position: static;
    display: block;
    padding: 0;
    border: 0;
    background: transparent;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .site-nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-2);
  }

  .nav-link {
    padding: var(--space-2) var(--space-3);
  }

  .section-title {
    font-size: var(--text-4xl);
  }
}

@media (min-width: 64rem) {
  :root {
    --gutter: var(--space-12);
    --section-y: var(--space-32);
  }

  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

  .btn--lg {
    padding: 1.15rem 2.4rem;
    font-size: var(--text-sm);
  }
}

/* Print: keep it readable, drop chrome chrome-effects */
@media print {
  .site-header,
  .nav-toggle,
  .marquee { display: none; }

  body {
    background: #fff;
    color: #000;
  }

  .card,
  .accordion__item {
    border: 1px solid #000;
    break-inside: avoid;
  }
}