:root {
  --paper: #f6f4ef;
  --ink: #1f1f1f;
  --muted: rgba(31, 31, 31, 0.48);
  --quiet: rgba(31, 31, 31, 0.42);
  --faint: rgba(31, 31, 31, 0.13);
  --screen-height: 100svh;
  --lane-height: var(--screen-height);
}

* {
  box-sizing: border-box;
}

html {
  height: 100%;
  background: var(--paper);
}

body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, Manrope, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  opacity: 0;
  animation: pageFade 700ms ease forwards;
}

button,
img {
  display: block;
}

button {
  font: inherit;
}

.lane {
  width: min(100%, 430px);
  height: var(--lane-height);
  margin: 0 auto;
  overflow-y: auto;
  overscroll-behavior-y: contain;
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.lane::-webkit-scrollbar {
  display: none;
}

.tanzaku {
  min-height: var(--lane-height);
  padding: 28px 26px 24px;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.tanzaku.is-first {
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.site-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding-top: 2px;
}

.site-name,
.site-concept,
.jp-poem,
.en-poem,
.position-indicator,
.upload-link {
  margin: 0;
}

.site-name {
  color: rgba(31, 31, 31, 0.86);
  font-size: 15px;
  font-weight: 500;
}

.site-concept {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
  text-align: right;
}

.memory {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content;
  grid-template-rows: minmax(0, 1fr) auto;
  column-gap: 16px;
  padding-top: 46px;
}

.tanzaku:not(.is-first) .memory {
  padding-top: 74px;
  padding-bottom: 74px;
}

.memory-photo {
  align-self: start;
  width: min(100%, 226px);
  margin: 0;
}

.memory-photo img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid rgba(31, 31, 31, 0.08);
  border-radius: 2px;
  backface-visibility: hidden;
  transition: none;
}

.jp-poem {
  align-self: center;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  color: var(--ink);
  font-family: "Shippori Mincho", "Noto Serif JP", "Yu Mincho",
    "Hiragino Mincho ProN", "Times New Roman", serif;
  font-size: 25px;
  font-weight: 400;
  line-height: 2.05;
}

.en-poem {
  grid-column: 1 / -1;
  width: min(270px, 76%);
  padding-top: 40px;
  color: var(--quiet);
  font-size: 11px;
  line-height: 1.75;
}

.site-foot {
  position: relative;
  padding-top: 26px;
}

.upload-link {
  display: block;
  width: fit-content;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--faint);
  background: transparent;
  color: rgba(31, 31, 31, 0.48);
  cursor: default;
  font-size: 11px;
  line-height: 1.8;
}

.upload-link:focus-within {
  outline: 1px solid rgba(31, 31, 31, 0.4);
  outline-offset: 5px;
}

.quiet-file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  border: 0;
  white-space: nowrap;
}

.position-indicator {
  position: fixed;
  right: max(18px, calc((100vw - 430px) / 2 + 18px));
  bottom: max(18px, calc((100vh - var(--lane-height)) / 2 + 18px));
  z-index: 2;
  color: rgba(31, 31, 31, 0.2);
  font-size: 11px;
  line-height: 1;
  pointer-events: none;
}

body.js-ready .jp-poem,
body.js-ready .en-poem {
  opacity: 0;
  transition: opacity 720ms ease;
}

body.js-ready .tanzaku.has-been-seen .jp-poem,
body.js-ready .tanzaku.has-been-seen .en-poem {
  opacity: 1;
}

body.js-ready .tanzaku.has-been-seen .en-poem {
  transition-delay: 90ms;
}

body.js-ready .tanzaku.is-poem-waiting .jp-poem,
body.js-ready .tanzaku.is-poem-waiting .en-poem {
  opacity: 0;
  transition: none;
}

body.js-ready .tanzaku.is-poem-waiting.show-japanese-poem .jp-poem,
body.js-ready .tanzaku.is-poem-waiting.show-english-poem .en-poem {
  opacity: 1;
  transition: opacity 760ms ease;
}

@media (min-width: 720px) {
  body {
    display: grid;
    place-items: center;
  }

  :root {
    --lane-height: min(812px, var(--screen-height));
  }

  .lane {
    border-right: 1px solid rgba(31, 31, 31, 0.06);
    border-left: 1px solid rgba(31, 31, 31, 0.06);
  }
}

@media (max-width: 360px) {
  .tanzaku {
    padding-right: 22px;
    padding-left: 22px;
  }

  .site-head {
    gap: 12px;
  }

  .memory {
    column-gap: 14px;
  }

  .jp-poem {
    font-size: 23px;
    line-height: 1.92;
  }
}

@media (max-height: 700px) {
  .tanzaku {
    padding-top: 22px;
    padding-bottom: 20px;
  }

  .memory {
    padding-top: 30px;
  }

  .tanzaku:not(.is-first) .memory {
    padding-top: 44px;
    padding-bottom: 50px;
  }

  .memory-photo {
    width: min(100%, 190px);
  }

  .en-poem {
    padding-top: 26px;
  }

  .site-foot {
    padding-top: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  body {
    opacity: 1;
    animation: none;
  }

  .lane {
    scroll-behavior: auto;
  }

  body.js-ready .jp-poem,
  body.js-ready .en-poem,
  body.js-ready .tanzaku.is-poem-waiting .jp-poem,
  body.js-ready .tanzaku.is-poem-waiting .en-poem {
    opacity: 1;
    transition: none;
  }
}

@keyframes pageFade {
  to {
    opacity: 1;
  }
}