/*
 * Seiblishof kiosk - touch kiosk on a 2160 x 3840 portrait screen.
 * Copyright (c) Stefan Ennemoser, web-crossing GmbH
 *
 * Sizing: 1rem is 1/54 of the width of a 9:16 frame (40 px at 2160 px width),
 * so the layout scales identically whatever Windows display scaling is set.
 */

:root {
  --z-base: 0;
  --z-sticky: 20;
  --z-overlay: 30;

  --menu-top: 54%;          /* where the button grid starts on the background */
  --btn-bg: rgb(8 32 64 / 0.62);
  --btn-bg-active: rgb(8 32 64 / 0.85);
  --btn-border: rgb(255 255 255 / 0.6);
  --text: #fff;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --slide-ms: 320ms;
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  font-size: min(calc(100vw / 54), calc(100vh / 96));
  height: 100%;
  background: #000;
}

body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font-family: var(--font);
  color: var(--text);
  background: #000;
  /* Kiosk: no text selection, no callouts, no double-tap zoom */
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  overscroll-behavior: none;
}

img { -webkit-user-drag: none; user-select: none; }

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  padding: 0;
  cursor: pointer;
}

button:focus-visible { outline: 0.15rem solid #fff; outline-offset: 0.2rem; }

svg { fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }

.view {
  position: fixed;
  inset: 0;
  z-index: var(--z-base);
  animation: fade-in 250ms var(--ease);
}
.view[hidden] { display: none; }

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Home ---------- */

.view--home {
  background: #000 center / cover no-repeat;
}

.lang {
  position: absolute;
  top: 2rem;
  right: 2rem;
  display: flex;
  gap: 0.6rem;
  z-index: var(--z-sticky);
}

.lang__btn {
  min-width: 5.4rem;
  min-height: 3.6rem;
  padding: 0 1.2rem;
  border-radius: 1.8rem;
  border: 0.08rem solid var(--btn-border);
  background: var(--btn-bg);
  backdrop-filter: blur(0.3rem);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: background-color 150ms, color 150ms, transform 120ms var(--ease);
}
.lang__btn[aria-pressed="true"] { background: #fff; color: #08203f; border-color: #fff; }
.lang__btn:active { transform: scale(0.95); }

.menu {
  position: absolute;
  top: var(--menu-top);
  left: 2.5rem;
  right: 2.5rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

.menu__btn {
  min-height: 5.6rem;
  padding: 1rem 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-radius: 0.8rem;
  border: 0.08rem solid var(--btn-border);
  background: var(--btn-bg);
  backdrop-filter: blur(0.4rem);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.2;
  text-wrap: balance;
  text-shadow: 0 0.05rem 0.2rem rgb(0 0 0 / 0.35);
  transition: background-color 150ms, transform 120ms var(--ease);
}
.menu__btn:active { background: var(--btn-bg-active); transform: scale(0.97); }
.menu__btn:disabled { opacity: 0.45; }

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

.view--gallery { background: #000; }

.gallery__viewport {
  position: absolute;
  inset: 0;
  overflow: hidden;
  touch-action: none; /* swipe is handled in JS */
}

.gallery__track {
  display: flex;
  height: 100%;
  will-change: transform;
}
.gallery__track.is-animating { transition: transform var(--slide-ms) var(--ease); }

.gallery__slide {
  flex: 0 0 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.gallery__slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.gallery__nav {
  position: absolute;
  top: 50%;
  width: 6rem;
  height: 6rem;
  margin-top: -3rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 0.08rem solid var(--btn-border);
  background: var(--btn-bg);
  backdrop-filter: blur(0.3rem);
  z-index: var(--z-overlay);
  transition: opacity 200ms, transform 120ms var(--ease);
}
.gallery__nav svg { width: 3rem; height: 3rem; }
.gallery__nav:active { transform: scale(0.93); }
.gallery__nav--prev { left: 1.5rem; }
.gallery__nav--next { right: 1.5rem; }
.gallery__nav[hidden] { display: none; }

.gallery__bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.4rem;
  z-index: var(--z-overlay);
}

.gallery__dots { display: flex; gap: 0.8rem; }
.gallery__dots span {
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  background: rgb(255 255 255 / 0.45);
  box-shadow: 0 0 0 0.06rem rgb(0 0 0 / 0.3);
  transition: background-color 200ms, transform 200ms;
}
.gallery__dots span.is-active { background: #fff; transform: scale(1.3); }

.gallery__home {
  min-height: 5rem;
  padding: 0 2.4rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  border-radius: 2.5rem;
  border: 0.08rem solid var(--btn-border);
  background: var(--btn-bg);
  backdrop-filter: blur(0.3rem);
  font-size: 1.5rem;
  font-weight: 700;
  transition: background-color 150ms, transform 120ms var(--ease);
}
.gallery__home svg { width: 2.4rem; height: 2.4rem; }
.gallery__home:active { background: var(--btn-bg-active); transform: scale(0.96); }

/* ---------- Fallback when no content could be loaded ---------- */

.unavailable {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  font-size: 1.6rem;
  background: #08203f;
  z-index: var(--z-overlay);
}
.unavailable[hidden] { display: none; }

@media (prefers-reduced-motion: reduce) {
  :root { --slide-ms: 1ms; }
  .view { animation: none; }
}