:root {
  --bg: #16140f;
  --ink: #ede8dd;
  --ink-dim: #ede8dd99;
  --scrim-1: #16140fcc;
  --scrim-2: #16140f66;
  --halo: 0 2px 18px rgba(0, 0, 0, 0.55);
  --radius: 3px;
}

:root[data-theme="light"] {
  --bg: #f3efe6;
  --ink: #1b1812;
  --ink-dim: #1b181299;
  --scrim-1: #f3efe6e6;
  --scrim-2: #f3efe699;
  --halo: 0 2px 18px rgba(243, 239, 230, 0.7);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-user-select: none;
  user-select: none;
}

html,
body {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  overflow: hidden;
  font-family: "Space Mono", ui-monospace, monospace;
  transition: background-color 0.4s ease, color 0.4s ease;
}

/* The stage: full screen, slides are placed absolutely inside it. */
.slider {
  position: relative;
  width: 100vw;
  height: 100svh;
  overflow: hidden;
  cursor: grab;
  touch-action: none; /* we handle dragging ourselves */
}
.slider.is-grabbing {
  cursor: grabbing;
}

/* Each slide stands on the floor (bottom-left) and grows upward. */
.slide {
  position: absolute;
  left: 0;
  bottom: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #00000022;
  transform-origin: left bottom; /* scale grows up and to the right from the floor */
  will-change: transform;        /* transform-only -> GPU-composited, no per-frame layout */
  backface-visibility: hidden;   /* promote to its own layer; kills sub-pixel shimmer */
}
.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
  -webkit-user-drag: none;
}

/* A soft scrim from the top-left so the headline stays legible over any photo. */
.scrim {
  position: absolute;
  inset: 0;
  z-index: 800;
  pointer-events: none;
  background: radial-gradient(
    120% 90% at 0% 0%,
    var(--scrim-1) 0%,
    var(--scrim-2) 28%,
    transparent 55%
  );
}

/* Overlaid text. */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
  padding: clamp(1.25rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.eyebrow {
  font-size: clamp(0.65rem, 1.1vw, 0.78rem);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-shadow: var(--halo);
}

.theme-toggle {
  pointer-events: auto;
  cursor: pointer;
  font-family: "Space Mono", ui-monospace, monospace;
  font-size: clamp(0.6rem, 1.05vw, 0.74rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ink-dim);
  border-radius: 999px;
  padding: 0.5em 1.1em;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  text-shadow: var(--halo);
  transition: border-color 0.2s ease, color 0.2s ease;
}
.theme-toggle::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
}
.theme-toggle:hover {
  border-color: var(--ink);
}

.title {
  font-family: "Anton", system-ui, sans-serif;
  font-weight: 400;
  font-size: clamp(3.4rem, 12vw, 9.5rem);
  line-height: 0.94;
  letter-spacing: 0.005em;
  text-transform: uppercase;
  max-width: 14ch;
  margin-top: 0.3em;
}

.foot {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  font-size: clamp(0.65rem, 1.1vw, 0.78rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-shadow: var(--halo);
}
.hint {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
}
.hint .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink);
  opacity: 0.7;
}

@media (prefers-reduced-motion: reduce) {
  .slide {
    will-change: auto;
  }
}