* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: #0f172a;
  font-family: Arial, Helvetica, sans-serif;
  overflow: hidden;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background: rgba(15, 23, 42, 0.92);
  color: white;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 34px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.brand {
  font-size: 24px;
  font-weight: bold;
  letter-spacing: 0.3px;
}

.subtitle {
  font-size: 14px;
  color: #cbd5e1;
}

#slideshow {
  width: 100vw;
  height: 100vh;
  scroll-snap-type: y mandatory;
}

.slide {
  width: 100vw;
  height: 100vh;
  padding: 84px 28px 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  scroll-snap-align: start;
}

.slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: white;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  border-radius: 6px;
}

.controls {
  position: fixed;
  bottom: 18px;
  right: 28px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
  background: rgba(15, 23, 42, 0.82);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 14px;
}

.controls button {
  border: none;
  background: #1e40af;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 22px;
  cursor: pointer;
  line-height: 28px;
}

.controls button:hover {
  background: #2563eb;
}