/* 加密聊天. No web fonts or third-party files: everything comes from this server. */
:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-2: #eef2f8;
  --text: #0f1b2d;
  --muted: #5b6b82;
  --line: #dde4ee;
  --accent: #0b5cff;
  --accent-ink: #ffffff;
  --accent-soft: #e6eeff;
  --warn: #a15c00;
  --warn-soft: #fff3df;
  --danger: #c8322b;
  --radius: 14px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans CJK SC", "Source Han Sans SC", "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #111a2c;
    --surface-2: #17223a;
    --text: #e8eef8;
    --muted: #93a3bb;
    --line: #22304b;
    --accent: #5b8cff;
    --accent-ink: #06122b;
    --accent-soft: #16244a;
    --warn: #f0b04a;
    --warn-soft: #2b2110;
    --danger: #ff6b63;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); line-height: 1.6; font-size: 16px; }
[hidden] { display: none !important; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
h1 { font-size: 1.5rem; margin: 20px 0 8px; line-height: 1.3; }
h2 { font-size: 1.05rem; margin: 0 0 6px; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.top { background: var(--surface); border-bottom: 1px solid var(--line); }
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 52px; }
.brand { font-size: 1.05rem; }
.burn-tag { color: var(--danger); background: color-mix(in srgb, var(--danger) 12%, transparent); }
.panic-armed, .btn.panic-armed { background: var(--danger); border-color: var(--danger); color: #fff; }
.tag { font-size: .7rem; font-weight: 600; color: var(--accent); background: var(--accent-soft); border-radius: 6px; padding: 1px 6px; vertical-align: middle; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 12px 0; }
.field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; font-size: .9rem; }
.input { font: inherit; color: inherit; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 9px 11px; width: 100%; }
.input:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.input-sm { width: auto; padding: 4px 8px; font-size: .875rem; }
textarea.input { resize: vertical; min-height: 46px; max-height: 40vh; }
.btn { font: inherit; font-weight: 600; border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 10px; padding: 8px 16px; cursor: pointer; text-decoration: none; display: inline-block; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: .6; cursor: default; }
.notice { background: var(--accent-soft); border-radius: 10px; padding: 10px 12px; margin: 12px 0; font-size: .9rem; }
.notice.warn { background: var(--warn-soft); color: var(--warn); }
.notice.error { background: var(--warn-soft); color: var(--danger); }
.tips { padding-left: 20px; }
.copy { display: flex; flex-direction: column; gap: 4px; width: 100%; text-align: left; font: inherit; color: inherit; background: var(--surface-2); border: 1px dashed var(--line); border-radius: 10px; padding: 10px 12px; cursor: pointer; }
.copy code { word-break: break-all; font-size: .8rem; }
.copy .hint { font-size: .75rem; color: var(--muted); }
.qr { max-width: 200px; margin-top: 12px; background: #fff; border-radius: 8px; }
.qr svg { display: block; width: 100%; height: auto; }

.room-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.room-head h1 { margin-bottom: 0; word-break: break-word; }
.room-actions { display: flex; gap: 8px; margin-top: 20px; }
.msgs { list-style: none; margin: 12px 0; padding: 0; display: flex; flex-direction: column; gap: 10px; min-height: 40vh; }
.msg { max-width: 85%; align-self: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 8px 12px; }
.msg.mine { align-self: flex-end; background: var(--accent-soft); border-color: transparent; }
.msg.bad { opacity: .7; font-style: italic; }
.msg-head { display: flex; flex-wrap: wrap; gap: 6px; align-items: baseline; font-size: .8rem; color: var(--muted); }
.msg-head .nick { font-weight: 600; color: var(--text); }
.msg-head .fp { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .75rem; }
.msg-head .fp.clash { color: var(--danger); font-weight: 600; }
.msg-text { white-space: pre-wrap; word-break: break-word; margin-top: 2px; }
.msg-foot { display: flex; gap: 10px; align-items: center; font-size: .75rem; color: var(--muted); margin-top: 2px; }
.msg-foot .burning { color: var(--danger); }
.linkish { font: inherit; background: none; border: 0; padding: 0; color: var(--accent); cursor: pointer; }
.composer { position: sticky; bottom: 0; background: var(--bg); padding: 8px 0 max(12px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); }
.composer-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 8px; }
.composer-row .btn { margin-left: auto; }

.top-me { display: flex; align-items: center; gap: 8px; }
.btn-sm { padding: 4px 12px; font-size: .875rem; }
.mt { margin-top: 12px; }
h3 { font-size: 1rem; margin: 16px 0 6px; }
.me { width: min(560px, calc(100vw - 32px)); max-height: calc(100vh - 32px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 16px 20px 20px; }
.me::backdrop { background: rgba(5, 10, 20, .55); }
.me-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.me-head h2 { margin: 0; }
.me form .btn { margin-right: 8px; }
.me-rooms { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.me-rooms li { background: var(--surface-2); border-radius: 10px; padding: 8px 12px; word-break: break-word; }
.me-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
details summary { cursor: pointer; color: var(--accent); font-size: .9rem; }
.backups { margin-top: 8px; }
.backups ul { list-style: none; padding: 0; margin: 4px 0 0; display: flex; flex-direction: column; gap: 4px; }
.backups li { font-size: .75rem; word-break: break-all; }
.backups li span { color: var(--muted); margin-right: 6px; }
.phrase code { display: block; font-size: 1.25rem; letter-spacing: .06em; padding: 10px 12px; background: var(--surface-2); border-radius: 10px; text-align: center; word-break: break-all; }
.dir-list { display: flex; flex-direction: column; gap: 10px; }
.dir-item { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.dir-item h3 { margin: 0 0 4px; }
.dir-item .desc { white-space: pre-wrap; word-break: break-word; font-size: .9rem; margin: 4px 0; }
.dir-item form { margin-top: 8px; }
.req-actions { display: flex; gap: 8px; margin-top: 6px; }