/* ==========================================================================
   COLOURS.CSS — Fundermax Washroom Collection Colour Catalogue
   toilet-cubicle.co.uk
   ========================================================================== */

/* -------------------------------------------------------------------------
   Page Hero — Narrow banner with diagonal cut
   ------------------------------------------------------------------------- */

.colours-hero {
  position: relative;
  padding: var(--sp-10) 0 var(--sp-8);
  background: linear-gradient(135deg, var(--color-petrol-deep) 0%, var(--color-petrol-dark) 60%, var(--color-petrol) 100%);
  overflow: hidden;
}

.colours-hero::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--color-off-white);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.colours-hero__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}

.colours-hero__text {
  max-width: 640px;
}

/* Eyebrow uses the shared .kicker / .kicker--inverse component (components.css) */

.colours-hero__title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
  color: var(--color-white);
  line-height: var(--leading-tight);
  margin-bottom: var(--sp-2);
}

.colours-hero__subtitle {
  font-size: var(--text-md);
  color: var(--color-grey-300);
  line-height: var(--leading-relaxed);
  max-width: 520px;
}

/* Lime text is permitted here: the hero surface is petrol-deep (BRAND.md §1) */
.colours-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--sp-2);
  padding: 6px 14px;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-lime);
  background: rgba(184, 218, 7, 0.08);
  border: 1px solid rgba(184, 218, 7, 0.25);
  border-radius: var(--radius-full);
  letter-spacing: var(--tracking-wide);
}

/* -------------------------------------------------------------------------
   Filter Bar — Category tabs
   ------------------------------------------------------------------------- */

.colours-filters {
  position: sticky;
  top: var(--header-height);
  z-index: calc(var(--z-sticky) - 1);
  background: var(--color-off-white);
  border-bottom: 1px solid var(--color-grey-200);
  transition: box-shadow var(--transition-base);
}

.colours-filters--shadow {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.colours-filters__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--sp-2) var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.colours-filters__inner::-webkit-scrollbar {
  display: none;
}

.colours-filters__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-grey-400);
  white-space: nowrap;
  flex-shrink: 0;
}

.colours-filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px; /* touch target */
  padding: 8px 18px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-grey-600);
  background: var(--color-white);
  border: 1px solid var(--color-grey-200);
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.colours-filter-btn:hover {
  border-color: var(--color-grey-400);
  color: var(--color-grey-900);
}

.colours-filter-btn--active {
  background: var(--color-petrol);
  border-color: var(--color-petrol);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.colours-filter-btn--active:hover {
  background: var(--color-petrol-dark);
  border-color: var(--color-petrol-dark);
  color: var(--color-white);
}

.colours-filter-btn__count {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  padding: 1px 7px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.08);
}

.colours-filter-btn--active .colours-filter-btn__count {
  background: rgba(255, 255, 255, 0.15);
}

/* -------------------------------------------------------------------------
   Colour Grid — Main swatch display
   ------------------------------------------------------------------------- */

.colours-section {
  background: var(--color-off-white);
  padding: var(--sp-6) 0 var(--sp-10);
  min-height: 60vh;
}

.colours-section__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}

.colours-section__note {
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  margin-bottom: var(--sp-4);
}

.colours-section__note a {
  color: var(--color-petrol);
  font-weight: var(--weight-semibold);
}

.colours-section__note a:hover {
  text-decoration: underline;
}

/* Category groups */
.colour-group {
  margin-bottom: var(--sp-8);
}

.colour-group:last-child {
  margin-bottom: 0;
}

.colour-group__header {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
  padding-bottom: var(--sp-2);
  border-bottom: 2px solid var(--color-petrol);
}

.colour-group__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-grey-900);
  line-height: 1;
}

.colour-group__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-grey-600);
  letter-spacing: var(--tracking-wide);
}

.colour-group__desc {
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  margin-bottom: var(--sp-4);
  max-width: 640px;
  line-height: var(--leading-normal);
}

/* Swatch grid */
.colour-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-3);
}

@media (min-width: 768px) {
  .colour-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (min-width: 1024px) {
  .colour-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

/* Individual colour card — card recipe per BRAND.md §4 */
.colour-card {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-grey-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition:
    transform 0.25s var(--ease-out),
    border-color 0.25s var(--ease-out),
    box-shadow 0.25s var(--ease-out);
  cursor: pointer;
}

.colour-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-petrol);
  box-shadow: var(--shadow-md);
}

.colour-card:focus-visible {
  outline: 2px solid var(--color-petrol);
  outline-offset: 2px;
}

.colour-card__swatch {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-bottom: 1px solid var(--color-grey-100);
}

/* Texture images within swatch */
.colour-card__swatch img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Subtle surface sheen so plain decors read as laminate, not flat hex */
.colour-card__swatch::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    118deg,
    rgba(255, 255, 255, 0.16) 0%,
    rgba(255, 255, 255, 0) 40%,
    rgba(0, 0, 0, 0.06) 100%
  );
  pointer-events: none;
}

/* LRV indicator bar — visible at rest; this is the page's key spec data */
.colour-card__lrv-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #1a1a1a, #ffffff);
  z-index: 1;
}

.colour-card__lrv-marker {
  position: absolute;
  top: -3px;
  width: 9px;
  height: 9px;
  background: var(--color-petrol);
  border: 2px solid var(--color-white);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Card info section */
.colour-card__info {
  padding: 14px 16px;
}

.colour-card__name {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-grey-900);
  margin-bottom: 4px;
  line-height: var(--leading-snug);
}

.colour-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-1);
}

.colour-card__code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-grey-600);
  letter-spacing: var(--tracking-wide);
}

.colour-card__figures {
  display: flex;
  align-items: center;
  gap: 6px;
}

.colour-card__lrv {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  color: var(--color-grey-600);
  letter-spacing: var(--tracking-wide);
  white-space: nowrap;
}

.colour-card__tag {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--color-grey-600);
  background: var(--color-grey-100);
  white-space: nowrap;
}

/* -------------------------------------------------------------------------
   Colour Detail Modal
   ------------------------------------------------------------------------- */

.colour-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-4);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.3s ease,
    visibility 0.3s ease;
}

.colour-modal-overlay--active {
  opacity: 1;
  visibility: visible;
}

.colour-modal {
  position: relative;
  width: 100%;
  max-width: 560px;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s var(--ease-spring);
}

.colour-modal-overlay--active .colour-modal {
  transform: translateY(0) scale(1);
}

.colour-modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 44px;  /* touch target */
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 20px;
  color: var(--color-grey-600);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
  backdrop-filter: blur(4px);
}

.colour-modal__close:hover {
  background: var(--color-white);
  color: var(--color-grey-900);
}

.colour-modal__swatch {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 7;
}

/* Same laminate sheen as the grid swatches */
.colour-modal__swatch::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    118deg,
    rgba(255, 255, 255, 0.16) 0%,
    rgba(255, 255, 255, 0) 40%,
    rgba(0, 0, 0, 0.06) 100%
  );
  pointer-events: none;
}

.colour-modal__body {
  padding: var(--sp-4);
}

.colour-modal__name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-grey-900);
  margin-bottom: 4px;
}

.colour-modal__code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  margin-bottom: var(--sp-3);
}

.colour-modal__specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-1) var(--sp-4);
  padding: var(--sp-3) 0;
  border-top: 1px solid var(--color-grey-100);
  border-bottom: 1px solid var(--color-grey-100);
}

.colour-modal__spec {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.colour-modal__spec-label {
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-grey-600);
}

/* Technical figures (decor code, LRV, NCS, RAL) are mono per BRAND.md §2 */
.colour-modal__spec-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-grey-900);
}

.colour-modal__availability {
  margin-top: var(--sp-3);
}

.colour-modal__availability-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-grey-600);
  margin-bottom: var(--sp-1);
}

.colour-modal__sizes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.colour-modal__size {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  padding: 4px 10px;
  background: var(--color-grey-100);
  border-radius: var(--radius-sm);
  color: var(--color-grey-600);
}

.colour-modal__cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--color-grey-100);
}

/* Per-decor sample request — link style per BRAND.md §1 (petrol, 600) */
.colour-modal__sample-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px; /* touch target */
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-petrol);
  text-decoration: none;
}

.colour-modal__sample-link:hover {
  color: var(--color-petrol-dark);
  text-decoration: underline;
}

.colour-modal__sample-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.colour-modal__disclaimer {
  margin-top: var(--sp-2);
  font-size: var(--text-2xs);
  color: var(--color-grey-600);
}

/* -------------------------------------------------------------------------
   Product Info Strip
   ------------------------------------------------------------------------- */

.colours-info {
  background: var(--color-white);
  border-top: 1px solid var(--color-grey-200);
  padding: var(--sp-8) 0;
}

.colours-info__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}

.colours-info__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
}

@media (min-width: 768px) {
  .colours-info__grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.colours-info__card {
  text-align: center;
  padding: var(--sp-4);
}

.colours-info__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--sp-2);
  color: var(--color-petrol);
}

.colours-info__card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-grey-900);
  margin-bottom: var(--sp-1);
}

.colours-info__card-text {
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  line-height: var(--leading-normal);
}

/* -------------------------------------------------------------------------
   Samples & Downloads — the page's accent moment (BRAND.md §1)
   ------------------------------------------------------------------------- */

.colours-samples {
  background: var(--color-petrol-deep);
  padding: var(--sp-8) 0;
}

.colours-samples__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
  align-items: center;
}

@media (min-width: 768px) {
  .colours-samples__inner {
    grid-template-columns: 1fr auto;
  }
}

.colours-samples__title {
  color: var(--color-white);
  font-size: clamp(var(--text-xl), 3vw, var(--text-3xl));
  margin-bottom: var(--sp-2);
}

.colours-samples__desc {
  font-size: var(--text-md);
  color: var(--color-grey-300);
  line-height: var(--leading-normal);
  max-width: 560px;
  margin-bottom: var(--sp-4);
}

.colours-samples__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.colours-samples__note {
  margin-top: var(--sp-2);
  font-size: var(--text-xs);
  color: var(--color-grey-400);
}

.colours-samples__cover {
  display: block;
  justify-self: center;
}

.colours-samples__cover img {
  display: block;
  width: 240px;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

/* -------------------------------------------------------------------------
   Installation Gallery
   ------------------------------------------------------------------------- */

.colours-gallery {
  background: var(--color-off-white);
  border-top: 1px solid var(--color-grey-200);
  padding: var(--sp-8) 0;
}

.colours-gallery__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}

.colours-gallery__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-grey-900);
  margin-bottom: var(--sp-1);
}

.colours-gallery__subtitle {
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  margin-bottom: var(--sp-5);
}

/* Source photographs are 337×220px — cap rendered width near native size
   so they are never upscaled and blurred */
.colours-gallery__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 340px));
  justify-content: start;
  gap: var(--sp-3);
}

.colours-gallery__item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 337 / 220;
  box-shadow: var(--shadow-sm);
}

.colours-gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

.colours-gallery__item:hover img {
  transform: scale(1.04);
}

.colours-gallery__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--sp-4) var(--sp-3) var(--sp-2);
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}

.colours-gallery__code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
}

/* -------------------------------------------------------------------------
   Stagger animation for cards
   ------------------------------------------------------------------------- */

@keyframes colour-card-in {
  0% {
    opacity: 0;
    transform: translateY(16px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.colour-card {
  animation: colour-card-in 0.4s var(--ease-out) both;
}

/* -------------------------------------------------------------------------
   Responsive adjustments
   ------------------------------------------------------------------------- */

@media (max-width: 767px) {
  .colours-hero__inner {
    padding: 0 var(--sp-3);
  }

  .colour-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--sp-2);
  }

  .colour-card__info {
    padding: 10px 12px;
  }

  .colour-card__name {
    font-size: var(--text-xs);
  }

  .colour-card__code {
    font-size: var(--text-2xs);
  }

  .colour-group__header {
    flex-direction: column;
    gap: 4px;
  }

  .colours-filters__inner {
    padding: var(--sp-1) var(--sp-3);
  }

  .colour-modal__specs {
    grid-template-columns: 1fr;
  }

  .colours-samples__cover {
    display: none; /* keep the strip compact on phones */
  }

  .colours-gallery__grid {
    grid-template-columns: 1fr;
  }

  .colours-gallery__item {
    max-width: 340px;
  }
}