/* ==========================================================================
   Ombra Studio — All Lighting collection
   Mobile-first. All colours / spacings / durations are tokens.
   ========================================================================== */

:root {
  /* Colours */
  --color-bg-off: #fafaf9;
  --color-bg-on: rgb(220 216 208);
  --color-bg: var(--color-bg-off);
  --color-text: #4a0a05;
  --color-line: var(--color-text);
  --color-badge: #e10000;
  --color-badge-text: #ffffff;
  --color-new: #1d39c4;

  /* Typography */
  --font-sans: "Inter", "DM Sans", "Helvetica Neue", Arial, sans-serif;
  --fs-xs: 0.6875rem;  /* 11px */
  --fs-sm: 0.8125rem;  /* 13px */
  --fs-base: 0.875rem; /* 14px */
  --fs-title: 1.75rem; /* 28px */
  --lh: 1.2;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --gutter: 1rem;
  --grid-gap-x: 0.75rem;
  --grid-gap-y: 2rem;

  /* Layout */
  --header-h: 3.75rem;
  --sidebar-w: 16.25rem; /* 260px */
  --line: 1px solid var(--color-line);

  /* Motion */
  --ease-switch: cubic-bezier(.4, 0, .2, 1);
  --ease-light: cubic-bezier(.42, 0, .58, 1);
  --dur-switch: 0.4s;
  --dur-light: 1.2s;
  --dur-hover: 0.5s;

  /* Light switch geometry */
  --switch-w: 2.25rem;
  --switch-h: 1.25rem;
  --switch-knob: 0.75rem;
  --switch-inset: 3px; /* + 1px border = 4px from the edge */
  --switch-travel: 15px;
}

/* Lighting state: one class, one variable swap. Works on <html> or <body>. */
.lighting-on {
  --color-bg: var(--color-bg-on);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --dur-switch: 0.01ms;
    --dur-light: 0.01ms;
    --dur-hover: 0.01ms;
  }
}

/* Disable transitions on first paint when the stored state is "on" */
.no-transition,
.no-transition * { transition: none !important; }

/* ---------- Base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh);
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--dur-light) var(--ease-light);
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }
ul { list-style: none; margin: 0; padding: 0; }
p { margin: 0; }
img { display: block; max-width: 100%; }
button, select, input { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
sup { font-size: 0.6em; line-height: 0; vertical-align: super; }

:focus-visible {
  outline: 1px solid var(--color-text);
  outline-offset: 3px;
}

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

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -3rem;
  z-index: 100;
  padding: var(--space-2) var(--space-3);
  background: var(--color-text);
  color: var(--color-bg-off);
}
.skip-link:focus { top: var(--space-2); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: var(--color-bg);
  border-bottom: var(--line);
  transition: background-color var(--dur-light) var(--ease-light);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 var(--gutter);
}

.logo { font-size: 1.125rem; letter-spacing: -0.01em; }

.main-nav,
.utility-nav { display: none; }

.mobile-actions { display: flex; gap: var(--space-2); }

.boxed {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2rem;
  padding: 0 var(--space-3);
  border: var(--line);
  font-size: var(--fs-sm);
}
.boxed:hover { text-decoration: none; }

.mobile-menu {
  padding: var(--space-4) var(--gutter) var(--space-6);
  border-top: var(--line);
  font-size: 1.375rem;
}
.mobile-menu li + li { margin-top: var(--space-2); }
.mobile-menu__secondary { margin-top: var(--space-6); font-size: var(--fs-base); }

/* ---------- Collection layout ---------- */
.collection {
  display: grid;
  grid-template-columns: 1fr;
  padding: 0 var(--gutter);
}

/* Sidebar becomes an accordion on mobile */
.collection__sidebar {
  display: flex;
  flex-wrap: wrap;
  padding-top: var(--space-4);
}

.accordion-toggle { font-size: var(--fs-base); padding: var(--space-2) 0; }

.category-nav {
  display: none;
  width: 100%;
  padding: var(--space-3) 0 var(--space-4);
}
.category-nav.is-open { display: block; }

.category-nav__group + .category-nav__heading,
.category-nav__group + .category-nav__group { margin-top: var(--space-5); }
.category-nav__heading { margin-top: var(--space-5); margin-bottom: var(--space-1); }
.category-nav__heading + .category-nav__group { padding-left: 0; }

.category-nav a {
  position: relative;
  display: inline-block;
  padding: 0.125rem 0;
  font-size: var(--fs-base);
}
/* Active category: small filled dot */
.category-nav a[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -0.75rem;
  top: 50%;
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: currentColor;
  transform: translateY(-50%);
}
.category-nav__heading + .category-nav__group a { margin-left: 0.75rem; }

/* ---------- Toolbar ---------- */
.utility-row { display: none; }

.toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "title light";
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-top: var(--line);
}

.toolbar__title {
  grid-area: title;
  margin: 0;
  font-size: var(--fs-title);
  font-weight: 400;
  line-height: var(--lh);
  letter-spacing: -0.015em;
}
.toolbar__count { font-size: var(--fs-sm); margin-left: 0.2em; vertical-align: super; letter-spacing: 0; }

.toolbar__filter {
  grid-area: filter;
  justify-self: start;
  font-size: var(--fs-base);
}

/* On mobile, "+ Filter" lives beside the category accordion (sidebar copy) */
.toolbar__filter--desktop { display: none; }
.toolbar__filter--mobile { margin-left: var(--space-6); padding: var(--space-2) 0; }

.view-switch { display: none; }

.light-toggle--mobile { grid-area: light; }
.light-toggle--desktop { display: none; }

/* ---------- Light switch ---------- */
.light-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-base);
}

.light-toggle__input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.light-toggle__switch {
  position: relative;
  display: inline-block;
  width: var(--switch-w);
  height: var(--switch-h);
  border: var(--line);
  border-radius: calc(var(--switch-h) / 2);
  background-color: transparent;
  cursor: pointer;
  transition: background-color var(--dur-switch) var(--ease-switch);
}

.light-toggle__switch::after {
  content: "";
  position: absolute;
  top: 50%;
  left: var(--switch-inset);
  width: var(--switch-knob);
  height: var(--switch-knob);
  border-radius: 50%;
  background-color: var(--color-text);
  transform: translate(0, -50%);
  transition:
    transform var(--dur-switch) var(--ease-switch),
    background-color var(--dur-switch) var(--ease-switch);
}

.light-toggle__input:checked + .light-toggle__switch { background-color: var(--color-text); }
.light-toggle__input:checked + .light-toggle__switch::after {
  background-color: var(--color-bg);
  transform: translate(var(--switch-travel), -50%);
}
.light-toggle__input:focus-visible + .light-toggle__switch {
  outline: 1px solid var(--color-text);
  outline-offset: 3px;
}

/* ---------- Filter panel ---------- */
.filter-panel {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5) var(--space-8);
  padding: var(--space-4) 0 var(--space-5);
  border-top: var(--line);
  font-size: var(--fs-base);
}
.filter-panel[hidden] { display: none; }
.filter-panel fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: var(--space-1); }
.filter-panel legend { padding: 0; margin-bottom: var(--space-2); }
.filter-panel input[type="checkbox"] { accent-color: var(--color-text); margin: 0 var(--space-1) 0 0; }
.filter-panel select { background: transparent; border: var(--line); border-radius: 0; padding: var(--space-1) var(--space-2); }
.link-btn { align-self: end; text-decoration: underline; text-underline-offset: 2px; }

/* ---------- Product grid ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(var(--cols, 2), minmax(0, 1fr));
  gap: var(--grid-gap-y) var(--grid-gap-x);
  padding: var(--space-2) 0 var(--space-8);
}

.product-card__link { display: block; }
.product-card__link:hover { text-decoration: none; }

.product-card__media {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background-color: #e8e3db; /* placeholder while lazy images load */
}

.product-card__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Stack: off (base) < on (lighting) < ambiance (hover) */
.product-card__img--on {
  opacity: 0;
  transition: opacity var(--dur-light) var(--ease-light);
}
.lighting-on .product-card__img--on { opacity: 1; }

.product-card__img--ambiance {
  opacity: 0;
  transition: opacity var(--dur-hover) var(--ease-switch);
}
@media (hover: hover) {
  .product-card__link:hover .product-card__img--ambiance,
  .product-card__link:focus-visible .product-card__img--ambiance { opacity: 1; }
}

.badge {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 1;
  padding: 0.1875rem 0.375rem;
  background: var(--color-badge);
  color: var(--color-badge-text);
  font-size: var(--fs-xs);
  line-height: 1;
}

.product-card__name { margin-top: var(--space-2); font-size: var(--fs-base); }
.product-card__price { font-size: var(--fs-base); }
.new-flag { margin-left: 0.25em; color: var(--color-new); font-size: 0.55rem; }

.empty-state { padding: var(--space-8) 0; }

/* ---------- Footer ---------- */
.site-footer {
  padding: var(--space-5) var(--gutter) 6rem;
  border-top: var(--line);
  font-size: var(--fs-sm);
}

/* ---------- Cookie banner ---------- */
.cookie-banner {
  position: fixed;
  left: var(--space-2);
  right: var(--space-2);
  bottom: var(--space-2);
  z-index: 30;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-text);
  color: var(--color-bg-off);
  font-size: var(--fs-sm);
}
.cookie-banner[hidden] { display: none; }
.cookie-banner__actions { display: flex; align-items: center; gap: var(--space-4); }
.cookie-banner a { text-decoration: underline; text-underline-offset: 2px; }
.cookie-banner button {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-bg-off);
}
.cookie-banner :focus-visible { outline-color: var(--color-bg-off); }

/* ==========================================================================
   Desktop ≥ 1024px
   ========================================================================== */
@media (min-width: 1024px) {
  :root {
    --header-h: 5rem; /* 80px */
    --gutter: 1.25rem;
    --grid-gap-x: 1rem;
    --grid-gap-y: 2.5rem;
  }

  .site-header__inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
  }
  .main-nav { display: block; }
  .main-nav ul { display: flex; gap: var(--space-6); font-size: var(--fs-base); }
  .utility-nav { display: block; justify-self: end; }
  .utility-nav ul { display: flex; gap: var(--space-4); font-size: var(--fs-sm); }
  .mobile-actions,
  .mobile-menu { display: none !important; }

  .collection {
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
    align-items: start;
  }

  .collection__sidebar {
    position: sticky;
    top: var(--header-h);
    display: block;
    padding-top: calc(var(--space-6) + 2.5rem);
    padding-left: var(--space-3);
  }
  .accordion-toggle { display: none; }
  .category-nav { display: block; padding: 0; }

  .utility-row {
    display: flex;
    justify-content: flex-end;
    padding: var(--space-4) 0 var(--space-3);
    min-height: calc(var(--space-6) + 2.5rem);
    align-items: flex-end;
  }
  .light-toggle--desktop { display: inline-flex; }
  .light-toggle--mobile { display: none; }

  .toolbar {
    grid-template-columns: 1fr auto 1fr;
    grid-template-areas: "title filter view";
    padding: var(--space-3) 0 var(--space-5);
  }
  .toolbar__filter--desktop { display: inline; justify-self: center; }
  .toolbar__filter--mobile { display: none; }

  .view-switch {
    grid-area: view;
    justify-self: end;
    display: flex;
    gap: var(--space-2);
    font-size: var(--fs-base);
  }
  .view-switch__btn[aria-pressed="true"] { text-decoration: underline; text-underline-offset: 3px; }

  .product-grid[data-view="s"] { --cols: 5; }
  .product-grid[data-view="m"] { --cols: 4; }
  .product-grid[data-view="l"] { --cols: 2; }

  .cookie-banner { left: auto; max-width: 26rem; }
}

@media (min-width: 1440px) {
  .product-grid[data-view="s"] { --cols: 6; }
  .product-grid[data-view="l"] { --cols: 3; }
}