:root {
  --bg: #0b0d10;
  --panel: #14171c;
  --panel2: #1b1f26;
  --line: #262b33;
  --text: #e8eaee;
  --muted: #9aa1ad;
  --accent: #6ee7a8;
  --accent-dim: #2b6b4a;
  --mine: #1f4d38;
  --danger: #ff7b72;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 18px 64px;
}
.brand {
  display: flex; align-items: center; gap: 8px;
  font-weight: 600; letter-spacing: .3px; color: var(--muted);
  margin-bottom: 28px;
}
.brand.small { margin-bottom: 14px; }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); display: inline-block; }
.brand.small #notify { margin-left: auto; }
h1 { font-size: 26px; line-height: 1.25; margin: 0 0 12px; font-weight: 650; }
h2 { font-size: 14px; text-transform: uppercase; letter-spacing: .8px; color: var(--muted); margin: 22px 0 8px; }
.lede { color: var(--muted); font-size: 17px; margin: 0 0 22px; }
.fine { color: #6f7681; font-size: 13px; margin-top: 14px; }
button { font: inherit; cursor: pointer; }
.primary {
  background: var(--accent); color: #06110b; border: 0;
  padding: 13px 20px; border-radius: 12px; font-weight: 650;
}
.primary.small { padding: 10px 16px; border-radius: 10px; }
.primary:disabled { opacity: .6; }
.primary.linkbtn { display: inline-block; text-decoration: none; margin-top: 10px; }
.ghost {
  background: transparent; color: var(--text);
  border: 1px solid var(--line); padding: 8px 12px; border-radius: 10px;
}
.ghost.on { border-color: var(--accent-dim); color: var(--accent); }
.banner {
  color: var(--muted); font-size: 13px; border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 12px; margin: 0 0 14px; background: var(--panel);
}
.shares { margin-bottom: 16px; }
.share { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.sharelabel { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .6px; min-width: 118px; }
.copied { color: var(--accent); font-size: 13px; }
.messages { display: flex; flex-direction: column; gap: 8px; min-height: 80px; margin-bottom: 8px; }
.msg { max-width: 84%; }
.msg .bubble {
  padding: 9px 12px; border-radius: 14px; background: var(--panel2);
  white-space: pre-wrap; word-wrap: break-word; overflow-wrap: anywhere;
}
.msg.mine { align-self: flex-end; }
.msg.mine .bubble { background: var(--mine); }
.msg .meta { font-size: 11px; color: var(--muted); margin: 3px 6px 0; }
.msg.mine .meta { text-align: right; }
.msg.gone { opacity: .55; }
.msg .bubble.vanish { font-style: italic; color: var(--muted); }
.msg.fading { opacity: 0; transform: translateY(-4px); transition: opacity .5s ease, transform .5s ease; }
.emptyhint { color: #6f7681; font-size: 13px; text-align: center; padding: 18px 8px; }
.sys { color: var(--danger); font-size: 13px; min-height: 18px; }
.composer { border-top: 1px solid var(--line); padding-top: 12px; margin-top: 10px; }
.composer textarea {
  width: 100%; background: var(--panel); color: var(--text);
  border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px;
  resize: none; font: inherit;
}
.composer-row { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; gap: 10px; }
.burn { color: var(--muted); font-size: 13px; display: flex; align-items: center; gap: 7px; }
.burn input { accent-color: var(--accent); width: 16px; height: 16px; }
.expiry { color: #6f7681; font-size: 12px; margin: 14px 0 0; }
.explain { border-top: 1px solid var(--line); margin-top: 28px; padding-top: 6px; }
.explain ul { margin: 0 0 6px; padding-left: 18px; color: var(--muted); }
.explain li { margin: 6px 0; }
@media (max-width: 480px) {
  h1 { font-size: 22px; }
  .wrap { padding: 18px 14px 48px; }
}