:root {
  --paper: #f6f1e8;
  --ink: #1c1916;
  --mute: #5c564e;
  --rule: #d4cbbd;
  --accent: #6b3f32;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.5 "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", serif;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
.private { padding: 0.6rem 1rem 0; font-size: 0.72rem; color: var(--mute); letter-spacing: 0.04em; }
.top, main, footer { width: 100%; max-width: 40rem; margin: 0 auto; padding: 0 1rem; }
.top { display: flex; justify-content: space-between; align-items: baseline; padding-top: 0.4rem; }
.mark { font-size: 1.05rem; margin: 0; }
.url { margin: 0; color: var(--mute); font-size: 0.85rem; }
.hero { padding: 1rem 0 0.8rem; }
.kicker { color: var(--accent); font-size: 0.85rem; margin: 0 0 0.4rem; }
h1 { font-size: 1.35rem; line-height: 1.25; font-weight: 500; margin: 0 0 0.4rem; }
.lead { font-size: 0.95rem; color: var(--mute); margin: 0; }
main { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.talk { flex: 1; display: flex; flex-direction: column; min-height: 0; border-top: 1px solid var(--rule); padding-top: 0.6rem; }
.talk h2, .hint { display: none; }
.log { flex: 1; overflow: auto; padding: 0.4rem 0 1rem; -webkit-overflow-scrolling: touch; }
.bubble { margin: 0 0 0.7rem; padding: 0.65rem 0.85rem; max-width: 88%; border-radius: 1rem; }
.bubble.angiel { background: #efe8dc; border-bottom-left-radius: 0.2rem; }
.bubble.you { margin-left: auto; background: #1c1916; color: #f6f1e8; border-bottom-right-radius: 0.2rem; }
.bubble.stop { background: #eadcd4; color: var(--ink); }
form {
  position: sticky; bottom: 0;
  display: flex; gap: 0.5rem; align-items: flex-end;
  padding: 0.5rem 0 calc(0.8rem + env(safe-area-inset-bottom));
  background: var(--paper);
}
textarea {
  flex: 1; font: inherit; font-size: 16px;
  padding: 0.65rem 0.75rem; border: 1px solid var(--rule);
  background: #fffaf3; color: var(--ink); resize: none; min-height: 2.6rem;
  border-radius: 1rem;
}
button {
  font: inherit; font-size: 0.95rem;
  background: var(--ink); color: var(--paper); border: 0;
  padding: 0.6rem 0.9rem; border-radius: 1rem; min-height: 2.6rem;
}
.sr { position: absolute; left: -9999px; }
footer { display: none; }
@media (min-width: 720px) {
  h1 { font-size: 1.7rem; }
  .talk h2, .hint, footer { display: block; }
  footer { padding: 1rem 1rem 2rem; color: var(--mute); font-size: 0.9rem; }
}

.open { font-size: 1.15rem; line-height: 1.55; margin: 0; max-width: 36rem; }
.hero { padding: 1.2rem 0 0.4rem; }
.private, .url, footer { display: none; }