/* ==========================================================================
   KOTO B&B — Antwerp
   Shared design system: tokens, reset, layout, chrome + components.
   Every page links THIS file; nothing downstream redefines these tokens.
   Mobile-first: base styles are small screens, min-width queries scale up.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* --- Core palette (olive-gold boutique identity) --- */
  --color-primary:        #a59347; /* olive-gold: logo, buttons, headings */
  --color-primary-strong: #8d7c34; /* hover / pressed */
  --color-primary-soft:   #e8e2cc; /* tinted surface, rules */
  --color-secondary:      #2e2e2e; /* dark surfaces, footer, body on light */
  --color-secondary-deep: #1b1b1b; /* deepest black, footer base */
  --color-accent:         #f1c050; /* bright gold: highlights, focus, stars */

  /* --- Neutrals & surfaces --- */
  --color-bg:             #ffffff;
  --color-bg-alt:         #f6f3ea; /* warm off-white section band */
  --color-surface:        #ffffff;
  --color-surface-soft:   #cccccc; /* partner strip / quiet panel */
  --color-surface-dark:   #232323; /* near-black bands */

  /* --- Text --- */
  --color-text:           #232323;
  --color-text-muted:     #5f5b4f;
  --color-text-invert:    #ffffff;
  --color-text-invert-muted: rgba(255, 255, 255, 0.72);
  --color-text-on-primary:#1b1b1b;

  /* --- Borders & lines --- */
  --color-border:         rgba(35, 35, 35, 0.14);
  --color-border-invert:  rgba(255, 255, 255, 0.18);

  /* --- Feedback --- */
  --color-success:        #4f7a45;
  --color-danger:         #b3402f;
  --color-focus:          #f1c050;

  /* --- Type families --- */
  --font-display: "Raleway", "Helvetica Neue", Arial, sans-serif;
  --font-body:    "Montserrat", "Helvetica Neue", Arial, sans-serif;
  --font-serif:   "Lora", "Georgia", "Times New Roman", serif;

  /* --- Fluid type scale (clamp: mobile -> desktop) --- */
  --fs-h1: clamp(2.25rem, 6.2vw + 1rem, 4.5rem);   /* ~36 -> 72px */
  --fs-h2: clamp(1.75rem, 3.6vw + 0.75rem, 3rem);  /* ~28 -> 48px */
  --fs-h3: clamp(1.375rem, 1.6vw + 0.9rem, 2rem);  /* ~22 -> 32px */
  --fs-h4: clamp(1.125rem, 0.7vw + 0.95rem, 1.375rem);
  --fs-body:      1rem;      /* 16px */
  --fs-body-lg:   1.125rem;  /* 18px */
  --fs-small:     0.875rem;  /* 14px */
  --fs-eyebrow:   0.75rem;   /* 12px, tracked caps */

  --lh-tight: 1.08;
  --lh-heading: 1.18;
  --lh-body: 1.7;

  --ls-display: 0.01em;
  --ls-eyebrow: 0.22em;

  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;

  /* --- Spacing scale (4px base) --- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;

  /* --- Layout --- */
  --container: 72rem;   /* 1152px content column */
  --container-narrow: 46rem;
  --gutter: var(--space-5);
  --section-y: clamp(3.5rem, 7vw, 6rem);
  --header-h: 4.75rem;

  /* --- Radius --- */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* --- Shadows --- */
  --shadow-sm: 0 1px 2px rgba(27, 27, 27, 0.06);
  --shadow-md: 0 8px 24px rgba(27, 27, 27, 0.10);
  --shadow-lg: 0 24px 60px rgba(27, 27, 27, 0.16);
  --shadow-gold: 0 14px 34px rgba(165, 147, 71, 0.28);

  /* --- Motion --- */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 140ms;
  --dur-base: 260ms;
  --dur-slow: 480ms;

  --z-header: 100;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3, h4 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-weight: var(--fw-light);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-display);
  color: var(--color-text);
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); line-height: var(--lh-tight); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); font-weight: var(--fw-regular); }

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

a {
  color: var(--color-primary-strong);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
a:hover { color: var(--color-primary); }

ul, ol { margin: 0 0 var(--space-4); padding-left: 1.25rem; }

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

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

::selection {
  background: var(--color-primary);
  color: var(--color-text-invert);
}

/* Visually hidden, but focusable — used by the skip link on every page */
.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;
}
.sr-only:focus {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 200;
  width: auto;
  height: auto;
  margin: 0;
  padding: var(--space-3) var(--space-4);
  overflow: visible;
  clip: auto;
  background-color: var(--color-secondary);
  color: var(--color-text-invert);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}

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

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

.section { padding-block: var(--section-y); }
.section-tight { padding-block: var(--space-7); }

.section-band { background-color: var(--color-bg-alt); }
.section-dark {
  background-color: var(--color-surface-dark);
  color: var(--color-text-invert);
}
.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 { color: var(--color-text-invert); }

/* Responsive auto grids */
.grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}
.grid-2,
.grid-3,
.grid-4 { grid-template-columns: 1fr; }

/* Flex helpers */
.stack       { display: flex; flex-direction: column; gap: var(--space-4); }
.stack-tight { display: flex; flex-direction: column; gap: var(--space-2); }
.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}
.split {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.center-x { margin-inline: auto; }

/* --------------------------------------------------------------------------
   4. TYPOGRAPHY HELPERS
   -------------------------------------------------------------------------- */
.eyebrow {
  display: block;
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-primary);
}
.section-dark .eyebrow { color: var(--color-accent); }

.lead {
  font-size: var(--fs-body-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.section-dark .lead { color: var(--color-text-invert-muted); }

.serif-italic {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-text-muted);
}

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

.display-divider {
  font-family: var(--font-display);
  font-weight: var(--fw-light);
  font-size: var(--fs-h2);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  text-align: center;
  color: var(--color-primary);
  margin: 0;
}

/* --------------------------------------------------------------------------
   5. BUTTONS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 2.875rem;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  text-align: center;
  transition: background-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn[disabled],
.btn.is-disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background-color: var(--color-primary-strong);
  color: var(--color-text-on-primary);
  box-shadow: var(--shadow-gold);
}

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

.btn-ghost {
  background-color: rgba(255, 255, 255, 0.10);
  color: var(--color-text-invert);
  border-color: var(--color-border-invert);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.20);
  color: var(--color-text-invert);
}

.btn-block { width: 100%; }

.btn-group { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* --------------------------------------------------------------------------
   6. CARDS
   -------------------------------------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-media {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
}

.card-body { padding: var(--space-5); }

.card-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  font-weight: var(--fw-regular);
  color: var(--color-text);
}

.card-text { color: var(--color-text-muted); font-size: var(--fs-small); }

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

.card-dark {
  background-color: var(--color-secondary);
  border-color: var(--color-border-invert);
  color: var(--color-text-invert);
}
.card-dark .card-title { color: var(--color-text-invert); }
.card-dark .card-text { color: var(--color-text-invert-muted); }

/* Quote card (testimonials) */
.quote-card {
  padding: var(--space-6);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.quote-card blockquote {
  margin: 0 0 var(--space-4);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-body-lg);
  line-height: 1.5;
  color: var(--color-text);
}
.quote-card cite {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--fs-small);
  font-style: normal;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}
.avatar {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-pill);
  object-fit: cover;
  border: 2px solid var(--color-primary-soft);
}

/* --------------------------------------------------------------------------
   7. FORMS
   -------------------------------------------------------------------------- */
.form-field { display: flex; flex-direction: column; gap: var(--space-2); }

.form-label {
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(241, 192, 80, 0.35);
}

/* --------------------------------------------------------------------------
   8. CHROME — HEADER / NAV
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-h);
}
.site-brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.05;
  text-decoration: none;
}
.site-brand-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: var(--fw-regular);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.site-brand-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

.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(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 1.25rem;
  height: 2px;
  margin-inline: auto;
  background-color: var(--color-primary);
}

.site-nav {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  padding: var(--space-4) var(--gutter) var(--space-6);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}
.site-nav.is-open { display: block; }

.site-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav-link {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.site-nav-link:hover,
.site-nav-link[aria-current="page"] { color: var(--color-primary); }
.site-nav-link[aria-current="page"] { border-bottom-color: var(--color-primary); }

.site-nav-cta { margin-top: var(--space-3); }

/* --------------------------------------------------------------------------
   9. CHROME — FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-secondary-deep);
  color: var(--color-text-invert-muted);
  padding-block: var(--space-8) var(--space-5);
}
.site-footer a { color: var(--color-primary); }
.site-footer a:hover { color: var(--color-accent); }

.site-footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
}
.footer-col-title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-invert);
}
.footer-brand .site-brand-name { color: var(--color-primary); }
.footer-brand .site-brand-tagline { color: var(--color-text-invert-muted); }
.footer-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--fs-small);
}
.footer-bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border-invert);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-small);
}
.footer-social {
  display: flex;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

/* --------------------------------------------------------------------------
   10. MEDIA QUERIES (mobile-first progressive enhancement)
   -------------------------------------------------------------------------- */
@media (min-width: 36rem) { /* >= 576px */
  :root { --gutter: var(--space-6); }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .btn-block { width: auto; }
}

@media (min-width: 48rem) { /* >= 768px */
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .split { flex-direction: row; align-items: center; }
  .split > * { flex: 1 1 0; }

  /* Desktop nav replaces the mobile toggle */
  .nav-toggle { display: none; }
  .site-nav {
    display: block;
    position: static;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }
  .site-nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
  }
  .site-nav-link {
    padding: var(--space-2) var(--space-3);
    border-bottom: 0;
  }
  .site-nav-cta { margin-top: 0; margin-left: var(--space-3); }

  .site-footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
}

@media (min-width: 64rem) { /* >= 1024px */
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}