/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

:root {
  --bg: #050508;
  --neon-cyan: #00f0ff;
  --neon-magenta: #ff00aa;
}

html {
  font-size: 16px;
}
body {
  font-family:
    "Zen Kaku Gothic New",
    Noto Sans JP,
    Arial,
    sans-serif;
  font-size: 1.25rem;
  font-weight: 300;
  color: #fff;
  overflow: hidden;
  display: flex;
  min-height: 100vh;
  background: var(--bg);
  line-height: 1.6;
  cursor: default;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 0, transparent, rgba(5, 5, 8, 0.4) 100%),
    radial-gradient(ellipse at 80% 80%, rgba(0, 240, 255, 0.03), transparent 40%),
    radial-gradient(ellipse at 20% 60%, rgba(255, 0, 170, 0.02), transparent 30%);
  pointer-events: none;
  z-index: 100;
}

.columns {
  display: flex;
  flex: 1;
  min-height: 100vh;
  overflow: hidden;
  gap: 1px;
}

.column {
  flex: 3 1 0%;
  display: flex;
  flex-direction: column;
  background-size: cover;
  background-position: center;
  position: relative;
  box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.7);
  transition: flex 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: flex;
  overflow: hidden;
}
.column::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(5, 5, 8, 0.3),
    rgba(5, 5, 8, 0.6) 50%,
    rgba(5, 5, 8, 0.85)
  );
  z-index: 1;
  pointer-events: none;
}
.column::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.02) 2px,
    rgba(0, 0, 0, 0.02) 4px
  );
  z-index: 2;
  pointer-events: none;
}

.column1 {
  background-image: url(https://cdn.pixabay.com/photo/2017/01/28/02/24/japan-2014618_960_720.jpg);
}
.column2 {
  background-image: url(https://cdn.pixabay.com/photo/2020/01/30/21/24/shop-4806610_960_720.jpg);
}
.column3 {
  background-image: url(https://cdn.pixabay.com/photo/2020/06/17/17/07/downtown-5310440_960_720.jpg);
}
.column4 {
  background-image: url(https://cdn.pixabay.com/photo/2017/01/28/02/24/japan-2014617_960_720.jpg);
}
.column5 {
  background-image: url(https://cdn.pixabay.com/photo/2017/01/28/02/24/japan-2014619_960_720.jpg);
}

.column p {
  flex: 1 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-shadow:
    0 0 30px rgba(0, 0, 0, 1),
    0 0 60px rgba(0, 0, 0, 0.8),
    0 3px 4px rgba(0, 0, 0, 1);
  font-size: 1.35em;
  font-weight: 300;
  transition:
    transform 0.5s,
    text-shadow 0.3s,
    opacity 0.3s;
  position: relative;
  z-index: 3;
  user-select: none;
  animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 0.85;
  }
  50% {
    opacity: 1;
  }
}
.column p:nth-child(2) {
  font-size: 1.6em;
  font-weight: 400;
  letter-spacing: 0.2em;
}
.column p:first-child,
.column p:last-child {
  transition:
    transform 0.5s,
    opacity 0.5s;
}
.column p:first-child {
  transform: translateY(-200%);
  opacity: 0;
}
.column p:last-child {
  transform: translateY(200%);
  opacity: 0;
}
.column.open-active p:first-child,
.column.open-active p:last-child {
  transform: translateY(0);
  opacity: 0.7;
}
.column.open-active p:first-child {
  opacity: 1;
}

.column.open {
  flex: 5;
  font-size: 1.12em;
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.5);
}
.column.open p {
  text-shadow:
    0 0 20px rgba(255, 255, 255, 0.1),
    0 0 40px rgba(0, 0, 0, 0.9),
    0 3px 4px rgba(0, 0, 0, 1);
  animation: none;
  opacity: 1;
}
.column:hover:not(.open) {
  box-shadow: inset 0 0 35px rgba(0, 0, 0, 0.55);
}
.column:hover:not(.open) p {
  opacity: 1;
}
.column:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: -2px;
}

@media (max-width: 1024px) {
  .columns {
    flex-direction: column;
  }
  .column {
    flex: 1 1;
    min-height: 20vh;
    flex-direction: row;
    align-items: center;
    background-position: center 30%;
  }
  .column::before {
    background: linear-gradient(
      90deg,
      rgba(5, 5, 8, 0.8),
      rgba(5, 5, 8, 0.4) 50%,
      rgba(5, 5, 8, 0.8)
    );
  }
  .column p {
    flex: 1;
    font-size: 1em;
    writing-mode: horizontal-tb;
    text-align: center;
    transform: none !important;
    opacity: 1 !important;
    padding: 0.6rem;
  }
  .column.open {
    flex: 4;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 1rem;
  }
  .column p {
    font-size: 0.9em;
  }
  .column p:nth-child(2) {
    font-size: 1.05em;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 0.9rem;
  }
  .column {
    min-height: 18vh;
  }
  .column p {
    font-size: 0.8em;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
  }
  .column p {
    transform: none !important;
    opacity: 1 !important;
  }
}