:root {
  --ink: #3d2c24;
  --paper: rgba(247, 241, 228, 0.86);
  --quiet: rgba(61, 44, 36, 0.72);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #1c1410;
  color: var(--ink);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Hiragino Mincho", Georgia, serif;
}

.room-shell {
  --chat-space: 8.75rem;
  width: min(720px, calc(100vw - 24px), calc((100dvh - 24px - var(--chat-space)) * 960 / 720));
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
}

.stage {
  width: 100%;
  aspect-ratio: 960 / 720;
  flex: none;
  position: relative;
  overflow: hidden;
}

.name-gate {
  position: absolute;
  inset: 0;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(28, 20, 16, 0.72);
}

.name-gate[hidden] {
  display: none;
}

.name-gate form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: min(280px, calc(100% - 48px));
  padding: 1.1rem 1.2rem;
  background: var(--paper);
  border-radius: 16px;
  pointer-events: auto;
}

.name-gate-label {
  font-size: 13px;
  color: var(--quiet);
}

.name-gate-error {
  margin: 0;
  font-size: 12px;
  color: #8a4030;
}

.name-gate-error[hidden] {
  display: none;
}

#visitor-name {
  border: 0;
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

.stage svg {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

#character {
  opacity: 1;
  pointer-events: none;
  transition: opacity 480ms ease;
}

#character.absent {
  opacity: 0;
}

.character-upper {
  transform-box: fill-box;
  transform-origin: 50% 49%;
  animation: character-breath 5.4s ease-in-out infinite;
}

.character-lower {
  transform: none;
}

#character-write-hands {
  display: none;
  pointer-events: none;
}

#character-write-hands.on {
  display: inline;
}

.character-write-hands-sprite {
  transform: none;
}

.character-upper,
.character-lower,
.character-reply {
  transition: opacity 560ms ease-in-out;
}

.character-reply {
  opacity: 0;
  pointer-events: none;
}

.character-blink {
  opacity: 0;
  pointer-events: none;
  transition: opacity 60ms ease-in-out;
}

#character.blinking .character-blink {
  opacity: 1;
}

#character.has-reply .character-upper,
#character.has-reply .character-lower {
  opacity: 0;
}

#character.has-reply .character-reply {
  opacity: 1;
}

#character.asleep .character-upper {
  clip-path: none;
  animation: none;
}

#character.asleep .character-lower {
  display: none;
}

#character.asleep.asleep-covered .character-upper {
  transform-box: fill-box;
  transform-origin: 50% 90%;
  animation: blanket-breath 5.6s ease-in-out infinite;
}

#character.book-transition .character-upper {
  animation: none;
}

#character.whole-body-pose .character-upper {
  clip-path: none;
  animation: none;
}

#character.whole-body-pose .character-lower {
  display: none;
}

html.preview-lock .character-upper {
  animation: none;
}

html.preview-lock .chat {
  display: none;
}

#door-panel {
  transform-box: fill-box;
  transform-origin: left center;
  transition: transform 680ms ease-in-out;
}

.pose-window_clean #door-panel,
.pose-window_clean_reach #door-panel {
  transform: translateX(-4px) skewY(-3deg) scaleX(0.24);
}

#bookshelf-red-book {
  transform-box: fill-box;
  transform-origin: 50% 50%;
  transition: opacity 420ms ease, transform 520ms ease;
}

#bookshelf-red-book.book-out {
  opacity: 0;
  transform: translateX(-8px);
}

#character.noticing:not(.asleep):not(.replying):not(.whole-body-pose) .character-upper,
#character.ambient-glance:not(.whole-body-pose) .character-upper {
  animation: character-glance 1.4s ease-in-out;
}

@keyframes character-breath {
  0%,
  100% {
    transform: translateX(-0.45px);
  }
  50% {
    transform: translateX(0.45px);
  }
}

@keyframes blanket-breath {
  0%,
  100% {
    transform: scaleY(1);
  }
  50% {
    transform: scaleY(1.014);
  }
}

@keyframes character-glance {
  0%, 100% { transform: translateX(0); }
  45% { transform: translateX(-2px); }
}

#curtain-left,
#curtain-right {
  transform-box: fill-box;
  transform-origin: 50% 0;
  animation: curtain-drift 13s ease-in-out infinite alternate;
}

#curtain-right {
  animation-delay: -5s;
}

#rain line {
  stroke-dasharray: 28 18;
  animation: rain-fall 1.8s linear infinite;
}

@keyframes curtain-drift {
  from { transform: skewX(-0.35deg); }
  to { transform: skewX(0.55deg); }
}

@keyframes rain-fall {
  to { stroke-dashoffset: -46; }
}

#lamp-glow-shape {
  opacity: 0.25;
  transition: opacity 400ms ease;
}

.period-evening #lamp-glow-shape,
.period-night #lamp-glow-shape,
.period-late_night #lamp-glow-shape {
  opacity: 1;
}

.weather-rain #rain {
  opacity: 0.7;
}

.weather-snow #snow {
  opacity: 0.9;
}

.season-winter #plant {
  filter: saturate(0.55) brightness(0.92);
}

.season-spring #plant {
  filter: saturate(1.12);
}

[data-trace],
[data-room-object] {
  opacity: 0;
  pointer-events: none;
  transition: opacity 420ms ease;
}

[data-trace].on,
[data-room-object].on {
  opacity: 1;
}

[data-trace].on.in-use,
[data-room-object].on.in-use {
  opacity: 0;
  pointer-events: none;
}

[data-paper] {
  cursor: pointer;
}

[data-paper="letter"],
[data-paper="diary"],
[data-trace].on[data-paper],
[data-paper="last_year"].on {
  animation: notice 7s ease-in-out infinite;
}

@keyframes notice {
  0%,
  100% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.1);
  }
}

[data-paper]:hover {
  animation: none;
  filter: brightness(1.16) drop-shadow(0 0 8px rgba(255, 236, 200, 0.4));
}

[data-trace].on[data-paper] {
  pointer-events: auto;
}

[data-paper="letter"],
[data-paper="diary"] {
  pointer-events: auto;
}

[data-paper="last_year"] {
  opacity: 0;
  pointer-events: none;
  transition: opacity 420ms ease;
}

[data-paper="last_year"].on {
  opacity: 0.82;
  pointer-events: auto;
}

.paper-layer {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(28, 20, 16, 0.28);
  z-index: 4;
}

.paper-layer[hidden] {
  display: none;
}

.paper {
  width: min(280px, calc(100% - 48px));
  max-height: min(72vh, 28rem);
  background: #f4ead8;
  color: var(--ink);
  padding: 1.4rem 1.3rem 1rem;
  box-shadow: 0 18px 40px rgba(28, 20, 16, 0.28);
  transform: rotate(-1.2deg);
  display: flex;
  flex-direction: column;
}

.paper-body {
  min-height: 4.5rem;
  max-height: 16rem;
  margin: 0 0 0.8rem;
  font-size: 15px;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-y: auto;
}

.paper-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin: 0 0 0.6rem;
}

.paper-nav[hidden] {
  display: none;
}

.paper-nav button {
  border: 0;
  background: transparent;
  color: var(--quiet);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  padding: 0.2rem 0;
}

.paper-nav button:disabled {
  opacity: 0.35;
  cursor: default;
}

.paper-pos {
  font-size: 12px;
  color: var(--quiet);
}

.paper-close {
  align-self: flex-end;
  border: 0;
  background: transparent;
  color: var(--quiet);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  padding: 0.2rem 0;
}

.chat {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  z-index: 3;
}

body:has(#name-gate:not([hidden])) .chat {
  visibility: hidden;
}

.transcript {
  min-height: 0;
  max-height: 8.5rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  gap: 6px;
  font-size: 15px;
  line-height: 1.5;
}

.line {
  max-width: 100%;
  padding: 0.4rem 0.85rem;
  background: var(--paper);
  color: var(--ink);
  border-radius: 16px 16px 16px 6px;
  box-shadow: 0 8px 20px rgba(28, 20, 16, 0.22);
}

.line.me {
  align-self: flex-end;
  max-width: 90%;
  padding: 0.28rem 0.75rem;
  background: rgba(247, 241, 228, 0.72);
  color: var(--quiet);
  font-size: 13px;
  text-align: right;
  border-radius: 16px 16px 6px 16px;
  box-shadow: 0 4px 12px rgba(28, 20, 16, 0.14);
}

.line.me.letter::before {
  content: "手紙";
  margin-right: 0.55rem;
  color: rgba(61, 44, 36, 0.52);
  font-size: 11px;
}

.line.system {
  align-self: center;
  padding: 0.2rem 0.65rem;
  background: rgba(247, 241, 228, 0.55);
  color: rgba(61, 44, 36, 0.6);
  font-size: 12px;
  box-shadow: none;
}

.line.pending {
  min-width: 44px;
  color: rgba(61, 44, 36, 0.55);
  animation: pending-pulse 1.1s ease-in-out infinite;
}

@keyframes pending-pulse {
  50% { opacity: 0.45; }
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  gap: 6px;
  pointer-events: auto;
}

.chat input {
  pointer-events: auto;
  width: 100%;
  border: 0;
  outline: none;
  background: var(--paper);
  color: var(--quiet);
  border-radius: 999px;
  padding: 0.65rem 1rem;
  font: inherit;
  font-size: 14px;
  box-shadow: 0 10px 28px rgba(28, 20, 16, 0.22);
}

.chat input::placeholder {
  color: rgba(61, 44, 36, 0.48);
}

.composer-button {
  border: 0;
  border-radius: 999px;
  padding: 0 0.85rem;
  background: rgba(247, 241, 228, 0.86);
  color: var(--quiet);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(28, 20, 16, 0.18);
}

.composer-button:hover,
.composer-button:focus-visible {
  background: rgba(255, 249, 237, 0.96);
}

.composer-button:disabled {
  cursor: default;
  opacity: 0.42;
}

.letter-read {
  color: #8a4e35;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 720px) {
  .room-shell {
    --chat-space: 6.5rem;
    gap: 8px;
  }

  .chat {
    gap: 4px;
  }

  .transcript {
    max-height: 4.2rem;
    font-size: 13px;
    gap: 4px;
  }

  .chat input {
    padding: 0.45rem 0.8rem;
    font-size: 13px;
  }

  .composer {
    grid-template-columns: minmax(0, 1fr) auto auto;
  }

  .composer-button {
    padding: 0 0.55rem;
    font-size: 11px;
  }

  .letter-read:not([hidden]) {
    grid-column: 2 / 4;
    min-height: 28px;
  }

  .name-gate form {
    width: min(240px, calc(100% - 24px));
    padding: 0.85rem 0.9rem;
    gap: 8px;
  }
}