/* ==========================================================================
   Olaf Minten Architectuur — shared design system
   --------------------------------------------------------------------------
   One stylesheet every page links to. Pages must NOT redefine these tokens.
   1 tokens · 2 base · 3 a11y · 4 layout · 5 type helpers
   6 buttons · 7 card · 8 editorial parts · 9 site chrome · 10 motion
   Mobile-first: base = small screens, min-width queries step up.
   Quiet-luxury architectural editorial: warm paper, ink, hairlines, one
   terracotta accent, mono uppercase labels, serif-italic accent words.
   ========================================================================== */

/* 1. Design tokens -------------------------------------------------------- */
:root {
  /* core swatches */
  --color-paper: #F7F5F1;
  --color-ink: #1A1A18;
  --color-muted: #6B6560;
  --color-hairline: #E2DDD5;
  --color-clay: #B4552D;
  --color-white: #FFFFFF;

  /* semantic roles */
  --color-background: var(--color-paper);
  --color-surface: var(--color-white);
  --color-text: var(--color-ink);
  --color-text-muted: var(--color-muted);
  --color-border: var(--color-hairline);
  --color-primary: #1A1A18;
  --color-primary-hover: #2F2E2A;
  --color-on-primary: #FFFFFF;
  --color-secondary: #E2DDD5;
  --color-secondary-hover: #D6CFC4;
  --color-on-secondary: #1A1A18;
  --color-accent: #B4552D;
  --color-accent-hover: #9C4824;
  --color-on-accent: #FFFFFF;

  /* warm neutral ramp */
  --color-neutral-0: #FFFFFF;
  --color-neutral-50: #F7F5F1;
  --color-neutral-100: #EFEAE2;
  --color-neutral-200: #E2DDD5;
  --color-neutral-300: #D0C9BE;
  --color-neutral-500: #6B6560;
  --color-neutral-700: #3A3833;
  --color-neutral-900: #1A1A18;

  /* type families */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* type scale */
  --text-h1: clamp(2.5rem, 5vw, 4.5rem);
  --text-h2: clamp(3rem, 4vw + 1rem, 5rem);
  --text-h3: clamp(1.25rem, 1rem + 0.5vw, 1.5rem);
  --text-h4: 1.125rem;
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-small: 0.875rem;
  --text-label: 0.6875rem;
  --text-label-sm: 0.625rem;

  --leading-display: 1.02;
  --leading-tight: 1.15;
  --leading-normal: 1.6;
  --leading-relaxed: 1.7;
  --weight-medium: 500;
  --tracking-tight: -0.02em;
  --tracking-label: 0.22em;
  --tracking-eyebrow: 0.24em;
  --tracking-wide: 0.28em;

  /* spacing scale (4px rhythm) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-9: 4rem;
  --space-10: 6rem;
  --space-11: 8rem;
  --gutter: 1.5rem;
  --section-y: 6rem;
  --grid-gap: 1.5rem;
  --stack-gap: 1.5rem;

  /* radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-full: 9999px;

  /* shadow — hairlines carry structure; shadows only for overlays */
  --shadow-none: none;
  --shadow-hairline: 0 0 0 1px var(--color-border);
  --shadow-overlay: 0 16px 40px -20px rgba(26, 26, 24, 0.35);

  /* motion */
  --ease-cinematic: cubic-bezier(0.19, 1, 0.22, 1);
  --duration-fast: 180ms;
  --duration-base: 400ms;
  --duration-slow: 700ms;

  /* layout */
  --container-max: 80rem;
  --measure: 60ch;
  --measure-tight: 46ch;
  --header-height: 4rem;
  --z-header: 100;
  --z-overlay: 200;
  --z-dialog: 300;
}

@media (min-width: 48rem) {
  :root {
    --gutter: 2.5rem;
    --section-y: 8rem;
    --grid-gap: 2rem;
    --header-height: 4.5rem;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0 0 var(--space-4);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

h1 { font-size: var(--text-h1); line-height: var(--leading-display); }
h2 { font-size: var(--text-h2); line-height: var(--leading-display); }
h3 { font-size: var(--text-h3); line-height: var(--leading-tight); }
h4 { font-size: var(--text-h4); line-height: var(--leading-tight); }

p { margin: 0 0 var(--space-4); text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
  transition: color var(--duration-base) var(--ease-cinematic);
}

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

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

ul, ol { margin: 0; padding: 0; }
li { list-style: none; }

small { font-size: var(--text-small); }

::selection {
  background-color: var(--color-clay);
  color: var(--color-white);
}

/* 3. Accessibility -------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: var(--z-dialog);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--duration-base) var(--ease-cinematic);
}

.skip-link:focus { transform: translateY(0); color: var(--color-on-primary); }

/* 4. Layout --------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-y);
  border-top: 1px solid var(--color-border);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-9);
}

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

.grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

@media (min-width: 48rem) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64rem) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}

.row-between { justify-content: space-between; }

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

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

.split {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
}

@media (min-width: 64rem) {
  .split { grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--grid-gap); }
  .split-5-7 > :first-child,
  .split-7-5 > :last-child { grid-column: span 5; }
  .split-5-7 > :last-child,
  .split-7-5 > :first-child { grid-column: span 7; }
  .split-4-8 > :first-child { grid-column: span 4; }
  .split-4-8 > :last-child { grid-column: span 8; }
}

.measure { max-width: var(--measure); }
.measure-tight { max-width: var(--measure-tight); }

/* 5. Type helpers --------------------------------------------------------- */
.eyebrow {
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  font-weight: 400;
  letter-spacing: var(--tracking-eyebrow);
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--color-accent);
}

.label {
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  font-weight: 400;
  letter-spacing: var(--tracking-wide);
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.lead {
  margin: 0 0 var(--space-5);
  max-width: var(--measure);
  font-size: var(--text-body-lg);
  line-height: var(--leading-relaxed);
}

.accent-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--color-accent);
}

.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }

/* 6. Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  background-color: transparent;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  font-weight: 400;
  letter-spacing: var(--tracking-label);
  line-height: 1;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--duration-base) var(--ease-cinematic),
    border-color var(--duration-base) var(--ease-cinematic),
    color var(--duration-base) var(--ease-cinematic);
}

.btn:hover { color: var(--color-text); }

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

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

.btn-secondary {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-on-secondary);
}

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

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

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

.btn-link {
  padding: 0.25rem 0;
  border-radius: 0;
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 0.45em;
}

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

.btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: var(--text-label-sm);
}

.btn-block { width: 100%; }

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* 7. Card ----------------------------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.card-media {
  aspect-ratio: 5 / 3;
  overflow: hidden;
  background-color: var(--color-neutral-100);
  border-bottom: 1px solid var(--color-border);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-cinematic);
}

.card:hover .card-media img { transform: scale(1.03); }

.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
}

.card-title {
  margin: 0;
  font-size: var(--text-h3);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.card-dots {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.card-dot {
  appearance: none;
  width: 0.5rem;
  height: 0.5rem;
  padding: 0;
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-full);
  background-color: transparent;
  cursor: pointer;
  transition:
    background-color var(--duration-base) var(--ease-cinematic),
    border-color var(--duration-base) var(--ease-cinematic);
}

.card-dot:hover { border-color: var(--color-accent); }

.card-dot.is-active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

/* 8. Editorial parts ------------------------------------------------------ */
.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-block: var(--space-6);
}

.stat-value {
  font-size: clamp(2.5rem, 3vw + 1.25rem, 3.5rem);
  font-weight: var(--weight-medium);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-tight);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.chip {
  appearance: none;
  padding: var(--space-2) 0;
  margin: 0 var(--space-5) 0 0;
  border: 0;
  border-bottom: 1px solid transparent;
  background: none;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  cursor: pointer;
  transition:
    color var(--duration-base) var(--ease-cinematic),
    border-color var(--duration-base) var(--ease-cinematic);
}

.chip:hover { color: var(--color-text); }

.chip.is-active {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  padding-left: var(--space-7);
  border-left: 1px solid var(--color-border);
}

.timeline-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.timeline-num {
  position: absolute;
  top: 0;
  left: calc(-1 * var(--space-7) - 1.125rem);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background-color: var(--color-background);
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  letter-spacing: var(--tracking-label);
  color: var(--color-text-muted);
}

.timeline-title {
  margin: 0;
  font-size: var(--text-h3);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.form-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}

@media (min-width: 48rem) {
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form-grid > .field-wide { grid-column: 1 / -1; }
}

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

.field-label {
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.input,
.textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  line-height: var(--leading-tight);
  transition: border-color var(--duration-base) var(--ease-cinematic);
}

.textarea {
  min-height: 9rem;
  resize: vertical;
  line-height: var(--leading-normal);
}

.input:hover,
.textarea:hover { border-color: var(--color-neutral-300); }

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

/* 9. Site chrome ---------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(247, 245, 241, 0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.site-brand {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  text-decoration: none;
  color: var(--color-text);
}

.site-brand:hover { color: var(--color-text); }

.site-brand-name {
  font-size: 1rem;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-tight);
  line-height: 1.1;
}

.site-brand-sub {
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 1.25rem;
  height: 1px;
  margin-inline: auto;
  background-color: var(--color-text);
  transition: transform var(--duration-base) var(--ease-cinematic);
}

.site-header.is-open .nav-toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header.is-open .nav-toggle-bar:nth-child(2) { opacity: 0; }
.site-header.is-open .nav-toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  gap: var(--space-5);
  padding: var(--space-5) var(--gutter) var(--space-6);
  background-color: var(--color-paper);
  border-bottom: 1px solid var(--color-border);
}

.site-header.is-open .site-nav,
.nav-toggle:focus ~ .site-nav { display: flex; }

.site-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.site-nav-item { display: block; }

.site-nav-link {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  padding-bottom: 0.25rem;
  border-bottom: 1px solid transparent;
  transition:
    color var(--duration-base) var(--ease-cinematic),
    border-color var(--duration-base) var(--ease-cinematic);
}

.site-nav-link:hover,
.site-nav-link.is-active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.site-nav-cta { align-self: flex-start; }

@media (min-width: 48rem) {
  .nav-toggle { display: none; }

  .site-nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--space-7);
    padding: 0;
    background: none;
    border: 0;
  }

  .site-nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
  }

  .site-nav-item { display: inline-block; }

  .site-nav-cta { align-self: center; }
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding-top: var(--section-y);
}

.footer-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
  padding-bottom: var(--space-9);
}

@media (min-width: 48rem) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64rem) {
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

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

.footer-brand {
  margin: 0;
  font-size: var(--text-h4);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-tight);
}

.footer-tagline {
  margin: 0;
  max-width: var(--measure-tight);
  font-size: var(--text-small);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
}

.footer-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
}

.footer-text {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-border);
}

@media (min-width: 48rem) {
  .footer-bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
}

.footer-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* 10. Motion -------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(1rem);
  transition:
    opacity var(--duration-slow) var(--ease-cinematic),
    transform var(--duration-slow) var(--ease-cinematic);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

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

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}