/* ============================================================
   Olaf Minten Architectuur — Design System
   Restrained, paper-and-ink editorial system.
   Near-monochrome with one warm terracotta accent.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  /* Palette — warm paper to deep ink, single clay accent */
  --color-background:        #F6F3EE; /* warm plaster / off-white */
  --color-background-deep:   #EFEAE2; /* faint section zebra */
  --color-surface:           #FFFFFF; /* cards, inputs */
  --color-foreground:        #1A1815; /* near-black architectural ink */
  --color-foreground-soft:   #2A2622;
  --color-primary:           #1A1815;
  --color-primary-foreground:#F6F3EE;
  --color-accent:            #A8572F; /* warm terracotta / clay */
  --color-accent-soft:       #C97A4D;
  --color-accent-foreground: #FFFFFF;
  --color-muted:             #6B665E; /* warm grey body text */
  --color-muted-soft:        #8E8880;
  --color-border:            #DDD8D0; /* hairline rules */
  --color-border-strong:     #C9C2B7;
  --color-overlay:           rgba(26, 24, 21, 0.04);

  /* Typography stacks */
  --font-sans:  "Inter", system-ui, -apple-system, BlinkMacSystemFont,
                "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Iowan Old Style", "Apple Garamond", "Times New Roman", serif;
  --font-mono:  ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
                "Liberation Mono", monospace;

  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semi:    600;

  /* Type scale — mobile-first, clamp()-driven */
  --text-xs:        0.75rem;     /*  12px — labels */
  --text-sm:        0.875rem;    /*  14px — small body */
  --text-base:      1rem;        /*  16px — body */
  --text-lg:        1.125rem;    /*  18px — large body */
  --text-xl:        clamp(1.25rem, 2vw, 1.5rem);
  --text-2xl:       clamp(1.5rem, 3vw, 2rem);
  --text-3xl:       clamp(2rem, 5vw, 3rem);
  --text-4xl:       clamp(2.5rem, 6vw, 4.5rem);
  --text-display:   clamp(3rem, 7vw, 6rem);

  --leading-tight:  1.05;
  --leading-snug:   1.2;
  --leading-normal: 1.5;
  --leading-relaxed:1.65;

  --tracking-tight:  -0.02em;
  --tracking-flat:   0;
  --tracking-wide:   0.08em;
  --tracking-wider:  0.22em;  /* mono labels */
  --tracking-widest: 0.28em;  /* mono eyebrows */

  /* Spacing scale (8px grid with finer increments) */
  --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: 5rem;
  --space-12: 6rem;
  --space-16: 8rem;

  /* Layout */
  --container-max:  1280px;
  --container-pad:  clamp(1.25rem, 4vw, 2.5rem);
  --measure:        62ch;
  --measure-tight:  46ch;

  /* Radius — restrained, paper-flat */
  --radius-sm:    2px;
  --radius-md:    6px;
  --radius-lg:    12px;
  --radius-pill:  9999px;

  /* Motion */
  --ease-out:   cubic-bezier(0.19, 1, 0.22, 1);
  --t-fast:     180ms var(--ease-out);
  --t-base:     300ms var(--ease-out);
  --t-slow:     700ms var(--ease-out);

  /* Borders (kept available as helpers) */
  --hairline:        1px solid var(--color-border);
  --hairline-strong: 1px solid var(--color-foreground);

  /* Z-stack */
  --z-header:    40;
  --z-menu:      50;
  --z-overlay:   80;
  --z-skip:      100;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--fw-regular);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg, video, picture { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
hr { border: 0; border-top: var(--hairline); margin: var(--space-7) 0; }

a { color: inherit; text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--color-accent); }
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

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

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5 {
  margin: 0;
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--color-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); }
p  { margin: 0; max-width: var(--measure); }
p + p { margin-top: var(--space-4); }
small { font-size: var(--text-sm); color: var(--color-muted); }
strong { font-weight: var(--fw-medium); }

/* Mono eyebrows and labels */
.eyebrow,
.mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--color-accent);
  font-weight: var(--fw-regular);
  display: inline-block;
}
.mono { color: var(--color-muted); letter-spacing: var(--tracking-wider); }
.italic-serif {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-accent);
}
.muted { color: var(--color-muted); }
.measure { max-width: var(--measure); }
.measure-tight { max-width: var(--measure-tight); }

/* ---------- Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}
.section { padding: clamp(3rem, 8vw, 6rem) 0; }
.section--tight { padding: clamp(2rem, 5vw, 4rem) 0; }
.divider-top { border-top: var(--hairline); }
.divider-bottom { border-bottom: var(--hairline); }
.stack > * + * { margin-top: var(--space-4); }
.stack-lg > * + * { margin-top: var(--space-7); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }
.between { display: flex; flex-wrap: wrap; gap: var(--space-5); align-items: center; justify-content: space-between; }

/* Grids — mobile first, escalate via min-width */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-5);
}
.grid-2, .grid-3, .grid-4 {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-3);
  background: var(--color-primary);
  color: var(--color-primary-foreground);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  z-index: var(--z-skip);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}
.skip-link:focus { left: var(--space-3); }

/* ============================================================
   Site Chrome — header, nav, mobile toggle, footer
   Every page reuses these blocks verbatim.
   ============================================================ */

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(246, 243, 238, 0.82);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: var(--hairline);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  min-height: 64px;
}
.site-brand {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: var(--text-base);
  letter-spacing: var(--tracking-tight);
  color: var(--color-foreground);
  line-height: 1.1;
}
.site-brand small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--color-muted);
  margin-top: 2px;
}
.site-brand:hover { color: var(--color-accent); }

/* ---- Desktop nav ---- */
.site-nav {
  display: none;
  align-items: center;
  gap: var(--space-6);
}
@media (min-width: 900px) {
  .site-nav { display: flex; }
}
.site-nav a {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-foreground);
  position: relative;
  padding: var(--space-2) 0;
}
.site-nav a:hover { color: var(--color-accent); }
.site-nav a.is-active { color: var(--color-foreground); }
.site-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--color-accent);
}
.site-nav-cta {
  margin-left: var(--space-3);
  color: var(--color-accent);
  font-weight: var(--fw-medium);
}
.site-nav-cta::after { display: none; }

/* ---- Mobile toggle (3-line hamburger that animates to X) ---- */
.site-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--color-foreground);
}
.site-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--t-base), opacity var(--t-base);
  transform-origin: center;
}
.site-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.site-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.site-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }
.site-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}
@media (min-width: 900px) {
  .site-toggle { display: none; }
}

/* ---- Mobile sheet menu ---- */
.site-menu {
  position: fixed;
  inset: 64px 0 0 0;
  background: var(--color-background);
  padding: var(--space-8) var(--container-pad) var(--space-12);
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  overflow-y: auto;
  z-index: var(--z-menu);
}
.site-menu.is-open { display: flex; }
.site-menu a {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-tight);
  padding: var(--space-4) 0;
  border-bottom: var(--hairline);
  color: var(--color-foreground);
}
.site-menu a:hover { color: var(--color-accent); }
@media (min-width: 900px) {
  .site-menu { display: none !important; }
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--fw-regular);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition:
    transform var(--t-fast),
    background-color var(--t-fast),
    color var(--t-fast),
    border-color var(--t-fast);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-foreground);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-foreground);
}
.btn-secondary {
  background: transparent;
  color: var(--color-foreground);
  border-color: var(--color-foreground);
}
.btn-secondary:hover {
  background: var(--color-foreground);
  color: var(--color-primary-foreground);
}
.btn-ghost {
  background: transparent;
  color: var(--color-foreground);
  border-color: transparent;
  text-transform: none;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--color-accent);
  letter-spacing: 0;
  padding: var(--space-2) 0;
  border-radius: 0;
}
.btn-ghost:hover { color: var(--color-accent); transform: none; }

/* ============================================================
   Components
   ============================================================ */

/* Card */
.card {
  background: var(--color-surface);
  border: var(--hairline);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}
.card-figure {
  aspect-ratio: 5 / 3;
  background: var(--color-background-deep);
  overflow: hidden;
  margin: calc(var(--space-6) * -1) calc(var(--space-6) * -1) var(--space-5);
  border-bottom: var(--hairline);
}
.card-figure img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow); }
.card:hover .card-figure img { transform: scale(1.02); }
.card-title { font-size: var(--text-xl); font-weight: var(--fw-medium); margin: 0 0 var(--space-1); }
.card-meta  { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: var(--tracking-wider); color: var(--color-muted); }

/* Stat band — hairline-divided cells */
.stat-band {
  display: grid;
  grid-template-columns: 1fr;
  border-top: var(--hairline);
  border-bottom: var(--hairline);
}
.stat-cell {
  padding: var(--space-6) 0;
  border-bottom: var(--hairline);
}
.stat-cell:last-child { border-bottom: 0; }
@media (min-width: 720px) {
  .stat-band { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat-cell { border-bottom: 0; border-right: var(--hairline); padding: var(--space-7) var(--space-6); }
  .stat-cell:nth-child(2n) { border-right: 0; }
  .stat-cell:nth-last-child(-n+2):nth-child(odd) { border-bottom: 0; }
}
@media (min-width: 1024px) {
  .stat-band { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .stat-cell { border-right: var(--hairline); padding: var(--space-7) var(--space-6); }
  .stat-cell:nth-child(4n) { border-right: 0; }
}
.stat-cell:first-child { padding-left: 0; }
.stat-cell:last-child  { padding-right: 0; }
.stat-value { display: block; font-size: var(--text-3xl); font-weight: var(--fw-medium); letter-spacing: var(--tracking-tight); }
.stat-label { display: block; margin-top: var(--space-3); font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: var(--tracking-wider); color: var(--color-muted); }

/* 8-step process timeline */
.timeline {
  position: relative;
  padding-left: var(--space-9);
}
.timeline::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 1.25rem;
  bottom: 0.5rem;
  width: 1px;
  background: var(--color-border);
}
.timeline-step {
  position: relative;
  padding-bottom: var(--space-8);
}
.timeline-step::before {
  content: attr(data-step);
  position: absolute;
  left: calc(var(--space-9) * -1 + 0.375rem);
  top: 0.25rem;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  background: var(--color-background);
  border: 1px solid var(--color-foreground);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-foreground);
}
.timeline-step h3 { font-size: var(--text-xl); margin-bottom: var(--space-2); }
.timeline-step p  { color: var(--color-muted); }

/* Carousel */
.carousel {
  position: relative;
  aspect-ratio: 5 / 3;
  background: var(--color-background-deep);
  overflow: hidden;
}
.carousel img { width: 100%; height: 100%; object-fit: cover; }
.carousel-dots {
  position: absolute;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-2);
}
.carousel-dots button {
  width: 18px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.55);
  border: 0;
  padding: 0;
  cursor: pointer;
  transition: background-color var(--t-fast), width var(--t-fast);
}
.carousel-dots button[aria-current="true"] {
  width: 28px;
  background: var(--color-accent);
}

/* Forms */
.field { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-5); }
.field label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-muted);
}
.field input,
.field textarea,
.field select {
  width: 100%;
  background: var(--color-surface);
  border: var(--hairline);
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  font-size: var(--text-base);
  color: var(--color-foreground);
  transition: border-color var(--t-fast);
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--color-foreground);
}
.field textarea { min-height: 140px; resize: vertical; }
.field--honeypot { position: absolute; left: -9999px; }

/* FAQ accordion */
.faq-item {
  border: var(--hairline);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: var(--space-5) var(--space-6);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: var(--fw-medium);
  color: var(--color-foreground);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-accent);
  transition: transform var(--t-base);
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin-top: var(--space-3); color: var(--color-muted); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-foreground);
  color: var(--color-primary-foreground);
  margin-top: var(--space-12);
}
.site-footer a { color: var(--color-primary-foreground); opacity: 0.75; transition: opacity var(--t-fast), color var(--t-fast); }
.site-footer a:hover { opacity: 1; color: var(--color-primary-foreground); }

.site-footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
  padding: var(--space-10) 0 var(--space-7);
}
@media (min-width: 720px) { .site-footer-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: var(--space-9); } }

.site-footer-brand .site-brand { color: var(--color-primary-foreground); }
.site-footer-brand .site-brand small { color: rgba(246, 243, 238, 0.6); }
.site-footer-brand p {
  margin-top: var(--space-4);
  color: var(--color-primary-foreground);
  opacity: 0.7;
  font-size: var(--text-sm);
  max-width: 36ch;
}

.site-footer-nav h4,
.site-footer-contact h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  opacity: 0.55;
  margin: 0 0 var(--space-4);
  font-weight: var(--fw-regular);
  color: var(--color-primary-foreground);
}
.site-footer-nav ul,
.site-footer-contact ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--text-sm);
}
.site-footer-contact li { opacity: 0.85; }

.site-footer-bottom {
  border-top: 1px solid rgba(246, 243, 238, 0.12);
  padding: var(--space-5) 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  opacity: 0.6;
}
.site-footer-bottom ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ============================================================
   Utilities
   ============================================================ */
.visually-hidden {
  position: absolute !important;
  width: 1px !important; height: 1px !important;
  padding: 0 !important; margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0,0,0,0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}
.text-center { text-align: center; }
.text-right  { text-align: right; }
.no-wrap { white-space: nowrap; }
.mt-7 { margin-top: var(--space-7); }
.mt-9 { margin-top: var(--space-9); }

/* Responsive text alignment tweaks */
@media (min-width: 720px) {
  .start-tablet { text-align: left; }
  .end-tablet   { text-align: right; }
}

/* ---------- Reveal animation utility ---------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}