:root {
  --bg: #f6f7f8;
  --card: #ffffff;
  --ink: #1c1c1c;
  --muted: #6b6f74;
  --line: #e3e5e8;
  --accent: #ff4500;
  --down: #6a5cff;
  --link: #0b63c5;
  --chip: #eef0f2;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1113;
    --card: #1a1d1f;
    --ink: #e6e8ea;
    --muted: #8b9196;
    --line: #2b3034;
    --link: #6cb4ff;
    --chip: #262a2d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
button {
  font: inherit;
  color: inherit;
  background: var(--chip);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 12px;
  cursor: pointer;
}
button:hover { border-color: var(--muted); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button.link { background: none; border: none; padding: 0 4px; color: var(--muted); font-size: 13px; }
button.link:hover { color: var(--ink); }

#app { max-width: 820px; margin: 0 auto; padding: 0 16px 40px; }
.boot { color: var(--muted); padding: 40px 0; text-align: center; }

/* frame */
.bar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 14px 0 10px;
}
.bar .brand { font-weight: 800; font-size: 22px; color: var(--accent); letter-spacing: -0.5px; }
.bar .brand::before { content: "集 "; }
.bar .where { color: var(--muted); flex: 1; }
.bar .action { font-weight: 600; }
.subs { display: flex; gap: 6px; flex-wrap: wrap; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.subs a { background: var(--chip); border-radius: 999px; padding: 2px 10px; font-size: 13px; color: var(--ink); }
.subs a.on { background: var(--accent); color: #fff; }
.notice {
  margin: 12px 0; padding: 8px 12px; border-radius: 8px;
  background: color-mix(in srgb, var(--accent) 12%, var(--card));
  display: flex; justify-content: space-between; align-items: center;
}

/* feed */
.tabs { display: flex; gap: 6px; margin: 12px 0; }
.tab.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.post, .comment {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  column-gap: 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 12px 8px 4px;
  margin-bottom: 8px;
}
.post > *, .comment > * { grid-column: 2; }
.post > .up, .comment > .up { grid-column: 1; grid-row: 1; }
.post > .score, .comment > .score { grid-column: 1; grid-row: 2; text-align: center; font-weight: 700; font-size: 13px; }
.post > .down, .comment > .down { grid-column: 1; grid-row: 3; }
.up, .down {
  background: none; border: none; padding: 0; line-height: 1;
  color: var(--muted); font-size: 14px; justify-self: center;
}
.up.on, .up:hover { color: var(--accent); }
.down.on, .down:hover { color: var(--down); }
.post > .title { grid-row: 1; font-size: 17px; font-weight: 600; color: var(--ink); }
.post.full > .title { font-size: 21px; }
.post > .sub { grid-row: 2; font-size: 12px; font-weight: 700; color: var(--ink); justify-self: start; }
.post > .meta, .comment > .meta { font-size: 12px; color: var(--muted); }
.post > .meta { grid-row: 3; }
.post > .ncom { font-size: 12px; font-weight: 600; color: var(--muted); justify-self: start; }
.excerpt { font-size: 14px; color: var(--muted); white-space: pre-wrap; overflow-wrap: anywhere;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.excerpt:empty { display: none; }
.body { white-space: pre-wrap; overflow-wrap: anywhere; margin: 6px 0; }
.post.full .body { font-size: 15px; }
.post > .link, .comment > .link { justify-self: start; }
.empty { color: var(--muted); padding: 30px 0; text-align: center; }

/* thread */
.comment { border-radius: 0 10px 10px 0; border-left: 3px solid var(--line); }
.comment > .meta { grid-row: 1; }
.comment > .body { grid-row: 2; margin: 2px 0; }
.comment > .link { grid-row: 3; }
.d1 { margin-left: 18px; } .d2 { margin-left: 36px; } .d3 { margin-left: 54px; }
.d4 { margin-left: 72px; } .d5 { margin-left: 90px; } .d6 { margin-left: 108px; }
@media (max-width: 520px) {
  .d1 { margin-left: 8px; } .d2 { margin-left: 16px; } .d3 { margin-left: 24px; }
  .d4 { margin-left: 32px; } .d5 { margin-left: 40px; } .d6 { margin-left: 48px; }
}
.replybox { display: flex; flex-direction: column; gap: 6px; margin: 0 0 12px; align-items: flex-start; }
.replybox textarea { width: 100%; }

/* forms */
.form { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin-top: 14px; }
.form .row { display: flex; gap: 8px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
.form .label { color: var(--muted); }
.form .hint { color: var(--muted); font-size: 13px; }
.relay, .mono { font-family: ui-monospace, Menlo, monospace; font-size: 13px; overflow-wrap: anywhere; }
input, textarea {
  font: inherit; color: inherit; background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px;
  flex: 1; min-width: 0;
}
textarea { width: 100%; resize: vertical; }
input:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 50%, transparent); }

footer { max-width: 820px; margin: 0 auto; padding: 16px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); }
footer .who { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
footer code { overflow-wrap: anywhere; }
footer #nsec { flex-basis: 100%; font-family: ui-monospace, Menlo, monospace; }