/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --color-neutral-50:  #fafafa;
  --color-neutral-100: #f5f5f5;
  --color-neutral-200: #e5e5e5;
  --color-neutral-300: #d4d4d4;
  --color-neutral-400: #a1a1a1;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;
  --color-neutral-950: #0a0a0a;

  --color-blue-500: #5576ff;
  --color-blue-600: #4c67db;
  --color-blue-900: #313e72;
  --color-blue-950: #1f2747;

  --color-red-500: #fb2c36;

  --surface-page:    var(--color-neutral-50);
  --surface-card:    #ffffff;
  --surface-overlay: var(--color-neutral-100);
  --border:          var(--color-neutral-200);
  --text-primary:    var(--color-neutral-900);
  --text-secondary:  var(--color-neutral-600);
  --text-muted:      var(--color-neutral-400);
  --brand-header:    var(--color-blue-950);
  --brand-nav:       var(--color-blue-900);
  --accent:          var(--color-blue-500);
  --accent-hover:    var(--color-blue-600);
  --error:           var(--color-red-500);
  --footer-bg:       var(--color-blue-950);

  --max-width:       1280px;
  --header-height:   100px;
  --radius:          4px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--surface-page);
  margin: 0;
}

h1, h2, h3, h4 { font-weight: 600; line-height: 1.25; margin-top: 0; }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

/* ============================================================
   SITE HEADER (brand bar — 56px)
   ============================================================ */
.site-header {
  background: var(--brand-header);
  height: 56px;
  display: flex;
  align-items: center;
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
  display: flex;
  align-items: center;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}
.site-header__brand:hover { text-decoration: none; }

.site-header__logo { max-height: 36px; width: auto; }

.site-header__name {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* ============================================================
   SITE NAV (nav bar — 44px)
   ============================================================ */
.site-nav {
  background: var(--brand-nav);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.site-nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  flex: 1;
}

.site-nav__link {
  color: rgba(255,255,255,0.88);
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 0.75rem;
  height: 44px;
  display: flex;
  align-items: center;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 150ms, color 150ms;
  white-space: nowrap;
}

.site-nav__link:hover { color: #fff; border-bottom-color: var(--accent); text-decoration: none; }

.site-nav .dropdown-menu {
  background: var(--brand-header);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  margin-top: 0;
  min-width: 200px;
}

.site-nav .dropdown-item {
  color: rgba(255,255,255,0.82);
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
}

.site-nav .dropdown-item:hover { background: rgba(255,255,255,0.1); color: #fff; }

.site-nav__search { display: flex; align-items: center; flex-shrink: 0; }

.site-nav__search-input {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.22);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  color: #fff;
  font-size: 0.875rem;
  padding: 0.25rem 0.75rem;
  width: 200px;
  height: 32px;
  outline: none;
  transition: background 150ms, border-color 150ms;
}
.site-nav__search-input::placeholder { color: rgba(255,255,255,0.45); }
.site-nav__search-input:focus { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.45); }

.site-nav__search-btn {
  background: var(--accent);
  border: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: #fff;
  padding: 0 0.75rem;
  height: 32px;
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: background 150ms;
}
.site-nav__search-btn:hover { background: var(--accent-hover); }

.site-nav__toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius);
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  margin-right: auto;
}
.site-nav__toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  margin: 4px 0;
  border-radius: 1px;
}

@media (min-width: 768px) {
  .site-nav__collapse { display: flex !important; flex: 1; }

  /* Hover-based dropdowns on desktop */
  .site-nav .dropdown { position: relative; }
  .site-nav .dropdown > .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 0;
    display: none;
  }
  .site-nav .dropdown:hover > .dropdown-menu { display: block; }
}

@media (max-width: 767px) {
  .site-nav { min-height: auto; padding: 0.5rem 0; }
  .site-nav__inner { flex-wrap: wrap; padding: 0 1rem; gap: 0.5rem; }
  .site-nav__toggle { display: block; }
  .site-nav__collapse { width: 100%; padding-top: 0.5rem; }
  .site-nav__list { flex-direction: column; align-items: flex-start; }
  .site-nav__link { height: auto; padding: 0.5rem 0; border-bottom: none; }
  .site-nav__search { width: 100%; }
  .site-nav__search-input { flex: 1; width: auto; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: var(--brand-header);
  background-image: radial-gradient(ellipse at 60% 50%, var(--brand-nav) 0%, var(--brand-header) 70%);
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__inner {
  text-align: center;
  padding: 3rem 1.5rem;
  width: 100%;
  max-width: 640px;
}

.hero__title {
  color: #fff;
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.hero__tagline {
  color: var(--color-neutral-300);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.hero__search {
  display: flex;
  max-width: 560px;
  margin: 0 auto;
}

.hero__search-input {
  flex: 1;
  border: none;
  border-radius: 8px 0 0 8px;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  outline: none;
  background: #fff;
}
.hero__search-input:focus { box-shadow: inset 0 0 0 2px var(--accent); }

.hero__search-btn {
  background: var(--accent);
  border: none;
  border-radius: 0 8px 8px 0;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 150ms;
}
.hero__search-btn:hover { background: var(--accent-hover); }

@media (max-width: 767px) {
  .hero { min-height: 180px; }
  .hero__title { font-size: 1.375rem; }
  .hero__inner { padding: 2rem 1rem; }
}

/* ============================================================
   COLLECTIONS SECTION (home)
   ============================================================ */
.collections-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.collections-section__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.tile-row--featured {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.tile-row--grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

@media (max-width: 1023px) {
  .tile-row--featured { grid-template-columns: repeat(2, 1fr); }
  .tile-row--grid     { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 639px) {
  .tile-row--featured,
  .tile-row--grid { grid-template-columns: 1fr; }
}

.tile {
  display: block;
  background-size: cover;
  background-position: center;
  background-color: var(--color-neutral-200);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  text-decoration: none;
  transition: transform 200ms ease, box-shadow 200ms ease;
}
.tile:hover { transform: scale(1.02); box-shadow: 0 8px 24px rgba(0,0,0,0.18); text-decoration: none; }

.tile--featured { aspect-ratio: 16/9; }
.tile--grid     { aspect-ratio: 4/3; }

.tile__title {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.68) 0%, rgba(0,0,0,0) 100%);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  padding: 2.5rem 0.75rem 0.75rem;
}

.tile--grid .tile__title {
  font-size: 0.875rem;
  padding: 2rem 0.5rem 0.5rem;
}

.tile-card {
  display: block;
  text-decoration: none;
}
.tile-card:hover { text-decoration: none; }

.tile-card__info {
  padding: 0.5rem 0.25rem 0.125rem;
}
.tile-card__name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 0.2rem;
}
.tile-card__desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted, #666);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   ASSET CARDS (collection + search results)
   ============================================================ */
.asset-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

@media (max-width: 1023px) { .asset-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 639px)  { .asset-grid { grid-template-columns: 1fr; } }

.asset-card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  display: block;
  transition: border-color 150ms, box-shadow 150ms;
}
.asset-card:hover {
  border: 2px solid var(--accent);
  box-shadow: 0 4px 12px rgba(0,0,0,0.10);
  text-decoration: none;
}

.asset-card__image-wrap {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-neutral-200);
}

.asset-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 200ms ease;
}
.asset-card:hover .asset-card__image { transform: scale(1.04); }

.asset-card__body { padding: 0.5rem 0.75rem 0.625rem; }

.asset-card__title {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

/* ============================================================
   COLLECTION PAGE
   ============================================================ */
.collection-header {
  background: var(--surface-card);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
  margin-bottom: 1.5rem;
}

.collection-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.breadcrumb-nav {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.breadcrumb-nav a { color: var(--text-muted); text-decoration: none; }
.breadcrumb-nav a:hover { color: var(--accent); }
.breadcrumb-nav .sep { margin: 0 0.25rem; }

.collection-header__title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.collection-header__h1 { font-size: 1.75rem; margin: 0; }

.collection-header__count {
  font-size: 0.875rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.collection-header__desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0.5rem 0 0;
}

.collection-body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

/* ============================================================
   PAGINATION
   ============================================================ */
.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.pager__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-decoration: none;
  background: var(--surface-card);
  transition: border-color 150ms, color 150ms;
}
.pager__btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.pager__btn--disabled { color: var(--text-muted); pointer-events: none; }

.pager__info { font-size: 0.875rem; color: var(--text-muted); }

/* ============================================================
   ASSET DETAIL
   ============================================================ */
.asset-nav-strip {
  background: var(--surface-overlay);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
}

.asset-nav-strip__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.asset-nav-strip__breadcrumb {
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.asset-nav-strip__breadcrumb a { color: var(--text-muted); text-decoration: none; }
.asset-nav-strip__breadcrumb a:hover { color: var(--accent); }
.asset-nav-strip__breadcrumb .sep { margin: 0 0.25rem; }

.asset-nav-strip__btns { display: flex; gap: 0.5rem; }

.btn-outline-sm {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-decoration: none;
  background: #fff;
  cursor: pointer;
  transition: border-color 150ms, color 150ms;
}
.btn-outline-sm:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn-outline-sm.disabled { color: var(--text-muted); pointer-events: none; }

.asset-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 65fr 35fr;
  align-items: start;
  min-height: calc(100vh - var(--header-height));
}

.asset-layout__media {
  padding: 1.5rem;
  background: #fff;
  position: sticky;
  top: var(--header-height);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.asset-layout__image {
  max-height: 80vh;
  width: auto;
  max-width: 100%;
  display: block;
}

.asset-layout__video {
  max-height: 80vh;
  width: 100%;
  display: block;
}

.asset-layout__meta {
  background: var(--surface-overlay);
  border-left: 1px solid var(--border);
  padding: 1.5rem;
  overflow-y: auto;
  min-height: calc(100vh - var(--header-height));
}

.asset-layout__title { font-size: 1.25rem; margin-bottom: 1rem; }

.asset-meta-dl { margin: 0 0 1.5rem; }

.asset-meta-dl dt {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-top: 0.75rem;
  margin-bottom: 0.125rem;
}

.asset-meta-dl dd {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.btn-download {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background 150ms;
}
.btn-download:hover { background: var(--accent-hover); color: #fff; text-decoration: none; }

@media (max-width: 767px) {
  .asset-layout { grid-template-columns: 1fr; }
  .asset-layout__media { position: static; border-bottom: 1px solid var(--border); }
  .asset-layout__meta { border-left: none; min-height: auto; }
  .asset-nav-strip__inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}

/* ============================================================
   SEARCH PAGE
   ============================================================ */
.search-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.search-bar {
  display: flex;
  margin-bottom: 1rem;
}

.search-bar__input {
  flex: 1;
  border: 1px solid var(--border);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  outline: none;
  background: #fff;
}
.search-bar__input:focus { border-color: var(--accent); }

.search-bar__btn {
  background: var(--accent);
  border: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 150ms;
}
.search-bar__btn:hover { background: var(--accent-hover); }

.search-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.search-filters {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.search-filters__label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
}

.search-filters select,
.search-filters input[type="date"] {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
  color: var(--text-primary);
  background: #fff;
  height: 32px;
  outline: none;
}
.search-filters select:focus,
.search-filters input[type="date"]:focus { border-color: var(--accent); }

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 4rem 1.5rem;
}

.empty-state__heading {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.empty-state__text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.empty-state__link { font-size: 0.9375rem; }

/* ============================================================
   SITE FOOTER
   ============================================================ */
.site-footer {
  background: var(--footer-bg);
  padding: 1.5rem 0;
  margin-top: 3rem;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer__links { display: flex; flex-wrap: wrap; gap: 1rem; }

.site-footer__links a {
  color: var(--color-neutral-300);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 150ms;
}
.site-footer__links a:hover { color: #fff; }

.site-footer__copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0;
}

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