:root {
  color-scheme: light;
  --gap: 6px;
  --tile-min: 180px;
  --bg: #111;
  --fg: #f2f2f2;
  --accent: #e6b800;
}

* { box-sizing: border-box; }

.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;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ---------- Header ---------- */

.site-header {
  position: relative;
  min-height: clamp(220px, 32vw, 380px);
  background-size: cover;
  background-position: center;
  background-color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.site-header__overlay {
  background: rgba(249, 216, 140, 0.45);
  padding: 1.5rem 2rem;
  border-radius: 8px;
  max-width: 90vw;
}

.site-header__overlay a {
  display: inline-block;
  line-height: 0;
}

.site-header__logo {
  height: clamp(70px, 22vw, 250px);
  width: auto;
  margin-bottom: 0.5rem;
}

.site-header__title {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 3rem);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.site-header__claim {
  margin: 0.25rem 0 0;
  opacity: 0.85;
  font-size: 1rem;
}

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

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--tile-min), 1fr));
  gap: var(--gap);
  padding: var(--gap);
}

.gallery__item {
  display: block;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: #1c1c1c;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.25s ease;
}

.gallery__item:hover img,
.gallery__item:focus-visible img {
  transform: scale(1.06);
}

.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  opacity: 0.7;
}

/* ---------- Footer ---------- */

.site-footer {
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.85rem;
  opacity: 0.7;
}

.site-footer a {
  color: var(--fg);
}

/* ---------- Lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.lightbox[hidden] { display: none; }

.lightbox__image {
  max-width: 92vw;
  max-height: 88vh;
  object-fit: contain;
}

.lightbox__close,
.lightbox__play,
.lightbox__prev,
.lightbox__next {
  position: absolute;
  background: transparent;
  border: none;
  color: var(--fg);
  font-size: 2.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
}

.lightbox__close { top: 0.5rem; right: 0.75rem; font-size: 2rem; }
.lightbox__play { top: 0.5rem; left: 0.75rem; font-size: 1.5rem; }
.lightbox__play.is-playing { color: var(--accent); }
.lightbox__prev { left: 0.5rem; top: 50%; transform: translateY(-50%); }
.lightbox__next { right: 0.5rem; top: 50%; transform: translateY(-50%); }

.lightbox__close:hover,
.lightbox__play:hover,
.lightbox__prev:hover,
.lightbox__next:hover { color: var(--accent); }

.lightbox__counter {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.75;
}

/* ---------- Scroll-nach-oben ---------- */

.scroll-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.6);
  color: var(--fg);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  opacity: 0.85;
  transition: opacity 0.2s ease, background 0.2s ease;
}

.scroll-top[hidden] { display: none; }

.scroll-top:hover,
.scroll-top:focus-visible {
  opacity: 1;
  background: var(--accent);
  color: #111;
}

/* ---------- Chaos-Button (Zufalls-Sortierung) ---------- */

.shuffle-btn {
  position: fixed;
  top: 1rem;
  right: 1rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.6);
  color: var(--fg);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 60;
  opacity: 0.85;
  transition: opacity 0.2s ease, background 0.2s ease;
}

.shuffle-btn:hover,
.shuffle-btn:focus-visible {
  opacity: 1;
  background: var(--accent);
}

.shuffle-btn.is-spinning {
  animation: shuffle-roll 0.5s ease;
}

@keyframes shuffle-roll {
  0% { transform: rotate(0deg) scale(1); }
  30% { transform: rotate(150deg) scale(1.2); }
  60% { transform: rotate(240deg) scale(0.9); }
  100% { transform: rotate(360deg) scale(1); }
}

@media (max-width: 600px) {
  :root { --tile-min: 120px; --gap: 3px; }
  .lightbox__prev, .lightbox__next { font-size: 1.8rem; }
  .scroll-top { right: 0.75rem; bottom: 0.75rem; width: 40px; height: 40px; }
  .shuffle-btn { top: 0.75rem; right: 0.75rem; width: 40px; height: 40px; }
  .site-header__overlay { padding: 1rem 1.25rem; }
}