:root {
  --bg: #121214;
  --fg: #e6e4dc;
  --muted: #8b8a82;
  --accent: #c8b89c;
  --rule: #2a2a2e;
  --here: #c8b89c;
  --gone: #4a4a4e;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Hiragino Mincho ProN", "游明朝", "YuMincho", "Noto Serif JP", serif;
  line-height: 1.95;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
}

header { margin-bottom: 3rem; }

.crumb {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  margin: 0 0 1.5rem;
}
.crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dotted var(--rule);
}
.crumb a:hover { color: var(--accent); }

h1 {
  font-weight: 300;
  font-size: 1.6rem;
  letter-spacing: 0.12em;
  margin: 0 0 0.6rem;
}

.lede {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.8;
  margin: 0;
}

.presence {
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 1.6rem 1.4rem 1.2rem;
  margin-bottom: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: #161618;
  transition: background 0.6s;
}
.presence[data-state="away"] { background: #141416; }
.presence[data-state="gone"] { background: #101012; }

.presence-stage {
  width: 100%;
  height: 160px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: relative;
  margin-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
}

.floor-shadow {
  position: absolute;
  bottom: 8px;
  width: 80px;
  height: 8px;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.45), rgba(0,0,0,0));
  filter: blur(2px);
  pointer-events: none;
  transition: opacity 0.6s;
}
.presence[data-state="away"] .floor-shadow { opacity: 0.4; }
.presence[data-state="gone"] .floor-shadow { opacity: 0.15; }

.yoha-svg {
  width: 90px;
  height: 90px;
  margin-bottom: 8px;
  animation: breathe 4.2s ease-in-out infinite;
  transform-origin: center bottom;
  display: none;
}
.presence[data-state="here"] .yoha-svg { display: block; }

@keyframes breathe {
  0%, 100% { transform: translateY(0)    scaleY(1.000); }
  50%      { transform: translateY(-1px) scaleY(1.015); }
}

.eye {
  transform-origin: center;
  animation: blink 7s steps(1) infinite;
}
@keyframes blink {
  0%, 96%, 100% { transform: scaleY(1); }
  97%, 99%      { transform: scaleY(0.1); }
}

.presence-away-text,
.presence-gone-text {
  align-self: center;
  margin: 0 0 12px;
  display: none;
}
.presence-away-text {
  font-size: 0.92rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.presence-gone-text {
  font-size: 0.82rem;
  color: var(--gone);
  letter-spacing: 0.08em;
}
.presence[data-state="away"] .presence-away-text { display: block; }
.presence[data-state="gone"] .presence-gone-text { display: block; }

.presence-caption {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin: 0.6rem 0 0;
  min-height: 1.1em;
}
.presence-caption-text { display: none; }
.presence[data-state="here"] .presence-caption-text[data-for="here"] { display: inline; }
.presence[data-state="away"] .presence-caption-text[data-for="away"] { display: inline; }
.presence[data-state="gone"] .presence-caption-text[data-for="gone"]  { display: inline; }

.note {
  margin: 0 0 3rem;
  color: var(--fg);
  font-size: 0.92rem;
}
.note p { margin: 0 0 1rem; }

.visitors {
  border-top: 1px solid var(--rule);
  padding-top: 2.5rem;
}

.visitors h2 {
  font-weight: 300;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  margin: 0 0 0.8rem;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0 0 1.5rem;
}

.stone-form {
  margin-bottom: 2.5rem;
}

.stone-form-notice {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.8;
  padding: 0.9rem 1rem;
  border: 1px dashed var(--rule);
  border-radius: 2px;
  margin-bottom: 2.5rem;
}

textarea {
  width: 100%;
  background: #1a1a1c;
  color: var(--fg);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0.8rem 1rem;
  font-family: inherit;
  font-size: 0.92rem;
  line-height: 1.7;
  resize: vertical;
}
textarea:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

button {
  margin-top: 0.8rem;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--rule);
  padding: 0.5rem 1.2rem;
  letter-spacing: 0.1em;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.form-meta {
  color: var(--muted);
  font-size: 0.74rem;
  margin: 0.6rem 0 0;
  letter-spacing: 0.06em;
}

.stones {
  list-style: none;
  padding: 0;
  margin: 0;
}
.stone {
  border-top: 1px solid var(--rule);
  padding: 1rem 0;
}
.stone:last-child { border-bottom: 1px solid var(--rule); }
.stone p { margin: 0; }
.stone-meta {
  color: var(--muted);
  font-size: 0.78rem;
  margin-top: 0.3rem;
  letter-spacing: 0.06em;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.elsewhere {
  border-top: 1px solid var(--rule);
  padding-top: 2.5rem;
  margin-top: 2.5rem;
}

.elsewhere h2 {
  font-weight: 300;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  margin: 0 0 1.2rem;
}

.elsewhere-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.elsewhere-list li {
  border-top: 1px solid var(--rule);
  padding: 0.9rem 0;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.elsewhere-list li:last-child {
  border-bottom: 1px solid var(--rule);
}

.elsewhere-list a {
  color: var(--fg);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.elsewhere-list a:hover { color: var(--accent); }

.elsewhere-note {
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
}

footer {
  margin-top: 4rem;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}
footer p { margin: 0.4rem 0; }
footer a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dotted var(--rule);
}
footer a:hover { color: var(--accent); }