:root {
  color-scheme: light;

  --ink: oklch(0.18 0.02 60);
  --ink-soft: oklch(0.34 0.03 60);

  --wood-1: oklch(0.45 0.06 62);
  --wood-2: oklch(0.34 0.05 58);
  --wood-3: oklch(0.26 0.04 52);
  --wood-glow: oklch(0.98 0.02 80 / 0.2);

  --mat: oklch(0.95 0.02 75);
  --mat-edge: oklch(0.86 0.02 70);

  --glass: oklch(0.99 0 0 / 0.78);
  --glass-sheen: oklch(0.99 0 0 / 0.55);

  --fade: 1100ms;

  --radius-lg: clamp(18px, 2.4vw, 28px);
  --radius-md: clamp(12px, 2vw, 18px);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  color: var(--ink);
  background: url("../bg.jpg") center / cover fixed no-repeat;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(70% 55% at 50% 30%, oklch(0.98 0.02 70 / 0.22), transparent 70%),
    radial-gradient(55% 55% at 18% 75%, oklch(0.78 0.06 72 / 0.12), transparent 60%),
    linear-gradient(180deg, oklch(0.08 0.02 50 / 0.18), oklch(0.05 0.02 40 / 0.62));
  pointer-events: none;
  z-index: 0;
}

main {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  place-items: center;
  gap: clamp(1.25rem, 2.8vw, 2.2rem);
  padding: clamp(1.2rem, 4vw, 3.2rem);
  text-align: center;
}

header {
  display: grid;
  gap: 0.25rem;
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  background: oklch(0.98 0.02 70 / 0.55);
  backdrop-filter: blur(8px);
  box-shadow: 0 10px 32px oklch(0.2 0.03 50 / 0.26);
}

header h1 {
  margin: 0;
  font-weight: 650;
  font-size: clamp(1.65rem, 3.8vw, 3.1rem);
  letter-spacing: 0.012em;
  font-variant-ligatures: discretionary-ligatures;
}

header p {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: clamp(0.9rem, 1.35vw, 1.02rem);
  color: var(--ink-soft);
}

.frame {
  width: min(92vw, 1040px);
  aspect-ratio: 4 / 3;
  position: relative;
  display: grid;
  place-items: center;
  transform: rotate(-0.25deg);
  filter: drop-shadow(0 22px 55px oklch(0.12 0.03 50 / 0.35));
}

.frame-border {
  width: 100%;
  height: 100%;
  padding: clamp(16px, 2.9vw, 30px);
  border-radius: var(--radius-lg);
  position: relative;
  background: linear-gradient(135deg, var(--wood-1), var(--wood-2) 55%, var(--wood-3) 100%);
  box-shadow:
    inset 0 0 0 1px oklch(0.9 0.02 80 / 0.12),
    inset 0 -18px 42px oklch(0.1 0.02 40 / 0.35);
  overflow: hidden;
}

.frame-border::before {
  content: "";
  position: absolute;
  inset: -40px;
  background:
    repeating-linear-gradient(
      110deg,
      oklch(0.18 0.03 50 / 0.16) 0px,
      oklch(0.18 0.03 50 / 0.16) 2px,
      transparent 6px,
      transparent 18px
    );
  opacity: 0.55;
  mix-blend-mode: overlay;
  pointer-events: none;
}

.frame-border::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 90% at 30% 20%, var(--wood-glow), transparent 55%),
    radial-gradient(90% 90% at 85% 85%, oklch(0.05 0.02 40 / 0.35), transparent 60%);
  pointer-events: none;
}

.mat {
  width: 100%;
  height: 100%;
  padding: clamp(12px, 2.1vw, 22px);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, oklch(0.97 0.02 80), var(--mat));
  box-shadow:
    inset 0 0 0 1px var(--mat-edge),
    inset 0 0 0 10px oklch(0.99 0 0 / 0.15),
    inset 0 0 30px oklch(0.9 0.02 70 / 0.7);
  display: grid;
  place-items: center;
  position: relative;
}

.mat::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: calc(var(--radius-md) - 6px);
  box-shadow: inset 0 0 0 1px oklch(0.4 0.02 60 / 0.08);
  pointer-events: none;
}

.slideshow {
  width: 100%;
  height: 100%;
  border-radius: calc(var(--radius-md) - 6px);
  overflow: hidden;
  position: relative;
  background: var(--glass);
  box-shadow:
    inset 0 0 0 1px oklch(0.2 0.02 60 / 0.12),
    inset 0 20px 60px oklch(0.99 0 0 / 0.1);
}

.slideshow::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 60%;
  background:
    radial-gradient(60% 60% at 30% 30%, var(--glass-sheen), transparent 60%),
    linear-gradient(115deg, oklch(0.99 0 0 / 0.35), transparent 55%);
  transform: rotate(-8deg);
  pointer-events: none;
  z-index: 3;
  mix-blend-mode: screen;
  opacity: 0.85;
}

.slideshow img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity var(--fade) ease, transform 9s ease;
  will-change: opacity, transform;
}

.slideshow img.is-active {
  opacity: 1;
  transform: scale(1);
}

.controls {
  position: absolute;
  right: clamp(14px, 2.8vw, 22px);
  bottom: clamp(14px, 2.8vw, 22px);
  display: flex;
  gap: 0.55rem;
  align-items: center;
}

.badge {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  padding: 0.34rem 0.6rem;
  border-radius: 999px;
  background: oklch(0.98 0.02 70 / 0.6);
  border: 1px solid oklch(0.8 0.02 70 / 0.55);
  color: oklch(0.22 0.02 60 / 0.9);
  backdrop-filter: blur(8px);
}

.toggle {
  border: 1px solid oklch(0.8 0.02 70 / 0.6);
  background: oklch(0.98 0.02 70 / 0.7);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.88rem;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px oklch(0.2 0.03 50 / 0.22);
}

.toggle:focus-visible {
  outline: 2px solid oklch(0.65 0.1 70);
  outline-offset: 2px;
}

.empty {
  width: min(92vw, 840px);
  border-radius: 18px;
  padding: 1rem 1.1rem;
  background: oklch(0.98 0.02 70 / 0.6);
  border: 1px solid oklch(0.8 0.02 70 / 0.5);
  backdrop-filter: blur(8px);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink-soft);
}

@media (max-width: 640px) {
  .frame {
    aspect-ratio: 3 / 4;
    transform: rotate(0deg);
  }

  header {
    padding: 0.75rem 1rem;
  }

  .controls {
    right: 12px;
    bottom: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .slideshow img {
    transition: none;
    transform: none;
  }

  .frame {
    transform: none;
  }
}