:root {
  --ink: #0b0d12;
  --white: #ffffff;
  --amber: #f2b705;
  --font: "Barlow", "DIN Alternate", "Segoe UI", system-ui, -apple-system, sans-serif;
  --slide-ms: 6000ms;
  --edge: clamp(0.75rem, 1.6vw, 1.5rem);
}

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

html, body { height: 100%; }

body {
  margin: 0;
  overflow: hidden;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  cursor: crosshair;
}

/* Achtergrond-slideshow */
.stage {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1);
  background-size: cover;
  background-position: center;
  transition: opacity 1.2s ease;
}

.slide.is-active {
  opacity: 1;
  animation: drift calc(var(--slide-ms) + 1400ms) linear forwards;
}

/* Fallback-kleurvlakken zolang er geen foto's in images/ staan */
.slide[data-slide="1"] {
  background-image: url("../img/uc_slide-1.jpg"),
    linear-gradient(180deg, #5f86b8 0%, #9db7c9 45%, #4e6b3f 46%, #2f4a2a 100%);
}
.slide[data-slide="2"] {
  background-image: url("../img/uc_slide-2.jpg"),
    linear-gradient(180deg, #3f6fb3 0%, #b9a8b4 40%, #8c8f86 41%, #55703f 70%, #2d3a33 100%);
}
.slide[data-slide="3"] {
  background-image: url("../img/uc_slide-3.jpg"),
    linear-gradient(180deg, #b9bfc8 0%, #8b95a1 55%, #4aa83a 56%, #6d7078 100%);
}
.slide[data-slide="4"] {
  background-image: url("../img/uc_slide-4.jpg"),
    linear-gradient(135deg, #cfd2d4 0%, #7a7e82 55%, #3a3d40 100%);
}

.shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 13, 18, 0.18), rgba(11, 13, 18, 0.32));
}

@keyframes drift {
  from { transform: scale(1); }
  to { transform: scale(1.05); }
}

/* Raster van 12 kolommen */
.grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.09) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%, 100% calc(100% / 6);
}

/* Crosshair die de muis volgt */
.cross {
  position: fixed;
  inset: 0;
  pointer-events: none;
  will-change: transform;
}

.cross-v,
.cross-h {
  position: absolute;
  background: rgba(255, 255, 255, 0.85);
}

.cross-v { top: 0; bottom: 0; left: 0; width: 1px; transform: translateX(var(--x, 50vw)); }
.cross-h { left: 0; right: 0; top: 0; height: 1px; transform: translateY(var(--y, 50vh)); }

.cross-dot {
  position: absolute;
  left: 0;
  top: 0;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  transform: translate(var(--x, 50vw), var(--y, 50vh));
}
.cross-dot::before,
.cross-dot::after {
  content: "";
  position: absolute;
  background: var(--white);
}
.cross-dot::before { left: 7px; top: 0; width: 2px; height: 16px; }
.cross-dot::after { top: 7px; left: 0; height: 2px; width: 16px; }

/* Woordmerk */
.center {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.wordmark {
  margin: 0;
  font-size: clamp(1.4rem, 2.6vw, 2.4rem);
  font-weight: 300;
  letter-spacing: 0.16em;
  padding-left: 0.16em; /* vangt de letterspatie rechts op, zodat het echt gecentreerd staat */
  text-shadow: 0 1px 14px rgba(0, 0, 0, 0.35);
}

/* Kleine labels */
.tag {
  position: fixed;
  margin: 0;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.6);
  pointer-events: none;
}

.tag-xy { top: var(--edge); left: var(--edge); }
.tag-grid { top: var(--edge); right: var(--edge); }
.tag-geo { bottom: calc(var(--edge) + 4px); left: var(--edge); }

.tag-status {
  top: 50%;
  right: var(--edge);
  writing-mode: vertical-rl;
  transform: translateY(-50%) rotate(180deg);
  letter-spacing: 0.22em;
}

/* Voortgangslijn onderaan */
.progress {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(255, 255, 255, 0.12);
}
.progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--amber);
}

@media (max-width: 600px) {
  .grid { background-size: calc(100% / 6) 100%, 100% calc(100% / 8); }
  .tag { font-size: 0.62rem; letter-spacing: 0.08em; }
}

@media (prefers-reduced-motion: reduce) {
  .slide { transition: none; }
  .slide.is-active { animation: none; }
}