/* ==========================================================================
   Sensunik — Frans-Belgische Bistro
   Shared design system: tokens + reusable site chrome components.
   Mobile-first. All later pages link this file and reuse these classes.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand palette */
  --color-primary: #1f2b26;        /* deep forest / near-black green */
  --color-primary-strong: #16201c;
  --color-secondary: #55595c;      /* warm slate from source imagery */
  --color-secondary-strong: #3d4143;
  --color-accent: #75c32c;         /* signature Sensunik green */
  --color-accent-strong: #5ea31d;
  --color-accent-soft: #eaf6dc;

  /* Neutrals */
  --color-neutral-50: #faf9f7;
  --color-neutral-100: #efefef;
  --color-neutral-200: #e2e2e2;
  --color-neutral-300: #cfcfcf;
  --color-neutral-400: #bbb;
  --color-neutral-500: #8e8e8e;
  --color-neutral-600: #6b6f72;
  --color-neutral-700: #55595c;

  /* Surfaces & text */
  --color-background: #fbfaf7;
  --color-surface: #ffffff;
  --color-surface-muted: #f4f3ef;
  --color-text: #23282a;
  --color-text-muted: #6b6f72;
  --color-text-invert: #f7f6f2;
  --color-border: #e2e2e2;

  /* Semantic */
  --color-success: #4d8f1e;
  --color-danger: #b3352b;

  /* Type scale */
  --font-heading: "Playfair Display", "Georgia", "Times New Roman", serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;

  --fs-h1: clamp(2.25rem, 1.6rem + 3.2vw, 4rem);
  --fs-h2: clamp(1.75rem, 1.3rem + 2.1vw, 2.75rem);
  --fs-h3: clamp(1.35rem, 1.1rem + 1.1vw, 1.9rem);
  --fs-h4: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --fs-body: 1rem;
  --fs-body-lg: 1.125rem;
  --fs-small: 0.875rem;
  --fs-xs: 0.75rem;
  --fs-eyebrow: 0.8125rem;

  --lh-tight: 1.15;
  --lh-heading: 1.25;
  --lh-body: 1.65;

  --ls-eyebrow: 0.18em;
  --ls-heading: 0.01em;

  /* 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-max: 1180px;
  --container-narrow: 760px;
  --gutter: 1.25rem;
  --header-height: 4.5rem;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(31, 43, 38, 0.06),
    0 1px 3px rgba(31, 43, 38, 0.08);
  --shadow-md: 0 4px 12px rgba(31, 43, 38, 0.08),
    0 2px 4px rgba(31, 43, 38, 0.06);
  --shadow-lg: 0 18px 40px rgba(31, 43, 38, 0.14),
    0 6px 14px rgba(31, 43, 38, 0.08);

  /* Motion */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  --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);
  line-height: var(--lh-body);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-accent-strong);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--color-primary);
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-heading);
  color: var(--color-primary);
}

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);
}

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

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

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

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

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

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

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

.section--tight {
  padding-block: var(--space-6);
}

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

.section--dark {
  background-color: var(--color-primary);
  color: var(--color-text-invert);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-text-invert);
}

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

.eyebrow {
  display: block;
  margin: 0 0 var(--space-3);
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-accent-strong);
}

.section--dark .eyebrow {
  color: var(--color-accent);
}

.lead {
  font-size: var(--fs-body-lg);
  color: var(--color-text-muted);
}

.text-center {
  text-align: center;
}

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

/* Grid & flex layout helpers */
.grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}

.grid--2,
.grid--3,
.grid--4 {
  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;
}

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  text-align: center;
  transition: background-color var(--transition-fast),
    color var(--transition-fast), border-color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:active {
  transform: translateY(1px);
}

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

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--color-accent-strong);
  border-color: var(--color-accent-strong);
  color: var(--color-primary-strong);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: var(--color-primary);
  color: var(--color-text-invert);
}

.section--dark .btn-secondary {
  border-color: var(--color-text-invert);
  color: var(--color-text-invert);
}

.section--dark .btn-secondary:hover,
.section--dark .btn-secondary:focus {
  background-color: var(--color-text-invert);
  color: var(--color-primary);
}

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

.btn--small {
  padding: 0.5rem 1rem;
  font-size: var(--fs-xs);
}

/* --------------------------------------------------------------------------
   5. 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(--transition-base),
    box-shadow var(--transition-base);
}

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

.card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

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

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

.card__body > :last-child {
  margin-bottom: 0;
}

.card__title {
  margin-bottom: var(--space-2);
  font-size: var(--fs-h4);
}

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

.card--accent {
  border-top: 4px solid var(--color-accent);
}

/* --------------------------------------------------------------------------
   6. Site header / navigation (chrome)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.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;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.site-brand:hover,
.site-brand:focus {
  color: var(--color-accent-strong);
}

.site-brand__mark {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  position: relative;
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  padding-block: var(--space-2);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-fast);
}

.site-nav__link:hover::after,
.site-nav__link:focus::after,
.site-nav__link[aria-current="page"]::after {
  width: 100%;
}

.site-nav__link:hover,
.site-nav__link:focus,
.site-nav__link[aria-current="page"] {
  color: var(--color-primary);
}

.site-nav__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.6rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.site-nav__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  transition: transform var(--transition-fast),
    opacity var(--transition-fast);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile-first: collapse the nav behind the toggle */
.site-nav__list {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding: var(--space-2) var(--gutter) var(--space-4);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: none;
}

.site-nav__list.is-open {
  display: flex;
}

.site-nav__list li {
  border-bottom: 1px solid var(--color-border);
}

.site-nav__list li:last-child {
  border-bottom: 0;
}

.site-nav__link {
  display: block;
  padding-block: var(--space-4);
}

/* --------------------------------------------------------------------------
   7. Site footer (chrome)
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: var(--space-8);
  background-color: var(--color-primary);
  color: var(--color-text-invert);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
  padding-block: var(--space-7);
}

.site-footer__brand {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-invert);
  margin-bottom: var(--space-3);
}

.site-footer__tagline {
  color: var(--color-neutral-300);
  max-width: 32ch;
}

.site-footer__heading {
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-accent);
}

.site-footer__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__list li + li {
  margin-top: var(--space-2);
}

.site-footer__list a,
.site-footer__contact a {
  color: var(--color-neutral-200);
}

.site-footer__list a:hover,
.site-footer__list a:focus,
.site-footer__contact a:hover,
.site-footer__contact a:focus {
  color: var(--color-accent);
}

.site-footer__contact {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--color-neutral-300);
}

.site-footer__contact li + li {
  margin-top: var(--space-2);
}

.site-footer__contact dt,
.site-footer__contact .label {
  color: var(--color-neutral-500);
  font-size: var(--fs-small);
}

.site-footer__bottom {
  border-top: 1px solid rgba(247, 246, 242, 0.15);
}

.site-footer__bottom-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-block: var(--space-4);
  font-size: var(--fs-small);
  color: var(--color-neutral-400);
}

/* --------------------------------------------------------------------------
   8. Larger screens
   -------------------------------------------------------------------------- */
@media (min-width: 600px) {
  :root {
    --gutter: 2rem;
  }

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

  .site-footer__bottom-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 900px) {
  :root {
    --gutter: 2.5rem;
  }

  .section {
    padding-block: var(--space-9);
  }

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

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

  .site-footer__grid {
    grid-template-columns: 1.6fr 1fr 1fr;
    padding-block: var(--space-8);
  }

  /* Restore an inline nav and hide the mobile toggle */
  .site-nav__toggle {
    display: none;
  }

  .site-nav__list {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-5);
    padding: 0;
    border: 0;
    box-shadow: none;
    background-color: transparent;
  }

  .site-nav__list li {
    border-bottom: 0;
  }

  .site-nav__link {
    padding-block: var(--space-2);
  }
}

@media (min-width: 1200px) {
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}