/* ================================================
   SMARTLAKE MOTORS — gallery.css
   Editorial grid layout — Smartlake colour palette
   Typography: IBM Plex Sans + DM Sans
   ================================================ */

/* ── Variables ───────────────────────────────── */
:root {
  --sl-blue:        #005EAB;
  --sl-blue-dark:   #004a8a;
  --sl-blue-light:  #4a90c4;
  --sl-gold:        #C9A84C;
  --sl-gold-pale:   rgba(201, 168, 76, 0.10);
  --sl-gold-dark:   #a8882e;
  --sl-black:       #0D0D0D;
  --sl-dark:        #1B2A3B;
  --sl-gray:        #555;
  --sl-gray-light:  #888;
  --white:          #ffffff;
  --gray-50:        #F7F9FC;
  --gray-100:       #f0f2f5;
  --gray-200:       #e2e6ea;
  --font-body:      'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display:   'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition-base: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.07);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.14);
  --container-padding: clamp(20px, 5vw, 60px);
}

/* ── Reset ───────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--sl-black);
  background: var(--white);
  line-height: 1.6;
  min-width: 320px;
}

::selection {
  background: rgba(201,168,76,0.25);
  color: inherit;
}

a { text-decoration: none; color: inherit; }

/* ── Container ───────────────────────────────── */
.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ── Section Label + Divider ─────────────────── */
.section-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sl-blue);
  margin-bottom: 10px;
}

.heading-divider {
  width: 48px;
  height: 3px;
  background: var(--sl-gold);
  border-radius: 2px;
  margin: 14px auto 0;
}

/* ================================================
   HERO
   ================================================ */
.page-hero {
  position: relative;
  min-height: 480px;
  height: 52vh;
  max-height: 600px;
  margin-top: 6em;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(13,13,13,0.85) 0%,
    rgba(13,13,13,0.58) 55%,
    rgba(13,13,13,0.22) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: clamp(32px, 6vw, 72px);
  padding-bottom: clamp(40px, 7vw, 80px);
  max-width: 680px;
  animation: heroEntrance 0.75s ease 0.1s both;
}

@keyframes heroEntrance {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(74,144,196,0.18);
  border: 1px solid rgba(74,144,196,0.4);
  color: #9DC8E8;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 18px;
  backdrop-filter: blur(8px);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero-accent {
  color: var(--sl-gold);
  font-style: italic;
}

.page-hero p {
  font-size: clamp(0.9375rem, 1.5vw, 1.0625rem);
  color: rgba(255,255,255,0.75);
  max-width: 480px;
  margin-bottom: 28px;
  line-height: 1.7;
}

.hero-cta-btn {
  display: inline-block;
  background: var(--sl-blue);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 13px 32px;
  border-radius: 8px;
  transition: var(--transition-base);
  border: 2px solid var(--sl-blue);
}

.hero-cta-btn:hover {
  background: var(--sl-blue-dark);
  border-color: var(--sl-blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,94,171,0.35);
}
/* ================================================
   GALLERY SECTION
   ================================================ */
.gallery-section {
  padding: 72px 0 96px;
  background: var(--gray-50);
}

/* ── Intro ───────────────────────────────────── */
.gallery-intro {
  text-align: center;
  margin-bottom: 40px;
}

.gallery-intro h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--sl-black);
  margin-bottom: 4px;
}

/* ── Category Filters ────────────────────────── */
.gallery-filters {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.4rem;
  background: var(--white);
  border: 1.5px solid var(--gray-200);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--sl-gray);
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.filter-btn:hover {
  border-color: var(--sl-blue);
  color: var(--sl-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.filter-btn.active {
  background: var(--sl-blue);
  color: var(--white);
  border-color: var(--sl-blue);
  box-shadow: 0 4px 14px rgba(0,94,171,0.28);
}

.filter-btn .count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  background: rgba(0,0,0,0.08);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1;
}

.filter-btn.active .count {
  background: rgba(255,255,255,0.22);
}

/* ================================================
   EDITORIAL GRID LAYOUT
   Spans set via JS so filtering reflows correctly.
   ================================================ */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 260px;
  grid-auto-flow: dense;
  gap: 12px;
}

/* ── Base gallery item ───────────────────────── */
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  cursor: pointer;
  background: var(--sl-dark);

  /* Reveal animation */
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease,
    box-shadow 0.28s ease;
}

.gallery-item.show {
  opacity: 1;
  transform: translateY(0);
}

.gallery-item.hidden {
  display: none;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item:hover {
  box-shadow: 0 16px 40px rgba(0,0,0,0.22);
  z-index: 2;
}

.gallery-item:hover img {
  transform: scale(1.06);
}

/* Spans are applied by JS — no static nth-child rules here */

/* ── Overlay info ────────────────────────────── */
.gi-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.1rem 1.25rem 1rem;
  background: linear-gradient(to top, rgba(13,13,13,0.88) 0%, rgba(13,13,13,0.4) 70%, transparent 100%);
  color: var(--white);
  transform: translateY(6px);
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.gallery-item:hover .gi-overlay {
  opacity: 1;
  transform: translateY(0);
}

/* Feature items always show a subtle overlay hint */
.gi-feature .gi-overlay,
.gi-feature--right .gi-overlay {
  opacity: 0.6;
  transform: translateY(0);
}

.gi-feature:hover .gi-overlay,
.gi-feature--right:hover .gi-overlay {
  opacity: 1;
}

.gi-category-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--sl-gold);
  margin-bottom: 4px;
}

.gi-overlay h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 2px;
  line-height: 1.3;
}

.gi-feature .gi-overlay h3,
.gi-feature--right .gi-overlay h3 {
  font-size: 1.25rem;
}

.gi-overlay p {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.82);
  line-height: 1.4;
}

/* Stagger delays */
.gallery-item:nth-child(1)  { transition-delay: 0s; }
.gallery-item:nth-child(2)  { transition-delay: 0.05s; }
.gallery-item:nth-child(3)  { transition-delay: 0.10s; }
.gallery-item:nth-child(4)  { transition-delay: 0.15s; }
.gallery-item:nth-child(5)  { transition-delay: 0.20s; }
.gallery-item:nth-child(6)  { transition-delay: 0.25s; }
.gallery-item:nth-child(7)  { transition-delay: 0.28s; }
.gallery-item:nth-child(8)  { transition-delay: 0.31s; }
.gallery-item:nth-child(9)  { transition-delay: 0.34s; }
.gallery-item:nth-child(10) { transition-delay: 0.37s; }
.gallery-item:nth-child(11) { transition-delay: 0.40s; }
.gallery-item:nth-child(12) { transition-delay: 0.43s; }

/* ================================================
   EXPANDED LIGHTBOX
   ================================================ */
.expanded-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.93);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  overflow-y: auto;
}

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

.close-expanded {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  color: var(--white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
  z-index: 2001;
}

.close-expanded:hover {
  background: var(--sl-blue);
  border-color: var(--sl-blue);
  transform: rotate(90deg);
}

.expanded-content {
  max-width: 960px;
  width: 100%;
  background: var(--white);
  border-radius: 14px;
  overflow: hidden;
  transform: scale(0.92);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 24px 64px rgba(0,0,0,0.55);
}

.expanded-overlay.active .expanded-content {
  transform: scale(1);
}

.expanded-image-container {
  width: 100%;
  background: var(--sl-black);
  display: flex;
  align-items: center;
  justify-content: center;
  max-height: 62vh;
}

.expanded-image-container img {
  width: 100%;
  height: auto;
  max-height: 62vh;
  display: block;
  object-fit: contain;
  animation: zoomIn 0.4s ease;
}

@keyframes zoomIn {
  from { transform: scale(0.96); opacity: 0.7; }
  to   { transform: scale(1);    opacity: 1;   }
}

.expanded-details {
  padding: 1.75rem 2rem;
  background: var(--white);
  border-top: 3px solid var(--sl-gold);
}

.expanded-details h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--sl-black);
  margin-bottom: 0.5rem;
}

.expanded-details p {
  font-size: 0.9375rem;
  color: var(--sl-gray);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.expanded-category {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0,94,171,0.08);
  color: var(--sl-blue);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ================================================
   RESPONSIVE
   ================================================ */

/* At 1100px: switch to 3 cols */
@media (max-width: 1100px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 240px;
  }
}

/* At 768px: 2-col grid */
@media (max-width: 768px) {
  .gallery-section { padding: 56px 0 72px; }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 200px;
    gap: 10px;
  }

  .gallery-filters { gap: 0.5rem; }

  .filter-btn {
    padding: 0.55rem 1.1rem;
    font-size: 0.85rem;
  }

  .expanded-overlay { padding: 1rem; padding-top: 4rem; }
  .expanded-details { padding: 1.25rem 1.5rem; }
  .expanded-details h2 { font-size: 1.25rem; }
}

/* At 480px: single column, no spans */
@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 240px;
    gap: 10px;
  }

  /* On single column all spans must be 1 — JS handles this via data-cols */
  .gallery-item {
    grid-column: span 1 !important;
    grid-row: span 1 !important;
  }

  .gallery-filters {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-btn {
    justify-content: space-between;
    border-radius: 8px;
  }

  /* Always show overlay text on mobile — no hover */
  .gi-overlay { opacity: 1; transform: translateY(0); }

  .expanded-image-container { max-height: 45vh; }
  .expanded-image-container img { max-height: 45vh; }
}

@media (max-width: 360px) {
  :root { --container-padding: 14px; }
}