[hidden] { display: none !important; }
:root {
  --canvas: #ffffff;
  --rail: #f8f8f8;
  --ink: #0d0d0d;
  --ink-soft: #34322d;
  --muted: #5d5d5d;
  --line: rgba(0, 0, 0, 0.08);
  --veil: rgba(0, 0, 0, 0.04);
  --veil-strong: rgba(0, 0, 0, 0.08);
  --danger: #7f1d1d;
  --radius: 10px;
  --font-ui: "DM Sans", "Avenir Next", "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { color: var(--ink); font-family: var(--font-ui); font-size: 15px; line-height: 1.5; background: var(--canvas); }
a { color: var(--ink); }
h1 { font-size: 1.75rem; font-weight: 600; letter-spacing: -0.03em; margin: 0.25rem 0; }
h2 { font-size: 1rem; font-weight: 600; margin: 2rem 0 0.75rem; }
h3 { font-size: 1rem; margin: 0 0 0.5rem; }
code { font-family: var(--font-mono); font-size: 0.85rem; word-break: break-all; }

button, input, select { font: inherit; }
button {
  border: 0; border-radius: var(--radius); background: var(--ink); color: #fff;
  padding: 0.6rem 1rem; font-weight: 500; cursor: pointer; transition: background 160ms ease, transform 160ms ease;
}
button:hover { background: #1a1a1a; }
button:active { transform: translateY(1px); }
button.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }
button.ghost:hover { background: var(--veil); }
button.danger { background: transparent; color: var(--danger); box-shadow: inset 0 0 0 1px rgba(127, 29, 29, 0.25); }
button.small { padding: 0.35rem 0.7rem; font-size: 0.85rem; }
input, select {
  border: 0; border-radius: var(--radius); background: var(--canvas); box-shadow: inset 0 0 0 1px var(--line);
  padding: 0.55rem 0.75rem; color: var(--ink); min-width: 0;
}
input:focus, select:focus, button:focus-visible, a:focus-visible { outline: 2px solid rgba(13, 13, 13, 0.3); outline-offset: 1px; }
label { font-size: 0.85rem; font-weight: 500; color: var(--ink-soft); }

.welcome { min-height: 100vh; display: grid; place-items: center; padding: 2rem 1.25rem; }
.welcome-card { width: min(440px, 100%); display: grid; gap: 0.75rem; }
.welcome-card form { display: grid; gap: 0.6rem; }
.brand { font-size: clamp(2.6rem, 7vw, 3.6rem); letter-spacing: -0.045em; line-height: 1.02; margin: 0; }
.lead { color: var(--muted); font-size: 1.02rem; margin: 0 0 0.75rem; max-width: 38ch; }
.hint { color: var(--muted); font-size: 0.85rem; margin: 0.25rem 0 0; }

.app { display: grid; grid-template-columns: 232px 1fr; min-height: 100vh; }
.rail { background: var(--rail); border-right: 1px solid var(--line); padding: 1.25rem 0.8rem; display: flex; flex-direction: column; gap: 0.25rem; }
.mark { font-size: 1.1rem; font-weight: 600; letter-spacing: -0.03em; padding: 0.3rem 0.6rem 1rem; }
.nav-item { display: flex; justify-content: space-between; align-items: center; padding: 0.55rem 0.7rem; border-radius: var(--radius); text-decoration: none; color: var(--ink-soft); }
.nav-item:hover { background: var(--veil); }
.nav-item.active { background: var(--veil-strong); color: var(--ink); font-weight: 600; }
.count { background: var(--ink); color: #fff; border-radius: 999px; font-size: 0.75rem; padding: 0 0.45rem; min-width: 1.3rem; text-align: center; }
.rail-foot { margin-top: auto; display: grid; gap: 0.5rem; padding: 0.5rem; }
.me { display: flex; align-items: center; gap: 0.5rem; font-weight: 500; }
.main { padding: 2rem clamp(1rem, 3vw, 2.75rem) 3rem; max-width: 920px; width: 100%; }
.head { margin-bottom: 1.25rem; }
.head .sub { color: var(--muted); margin: 0; }

.card { background: var(--canvas); border-radius: 14px; box-shadow: inset 0 0 0 1px var(--line); padding: 1rem 1.1rem; margin: 0 0 0.75rem; }
.card.reveal { background: var(--rail); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0.75rem; }
.row { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.grow { flex: 1 1 12rem; min-width: 0; }
.stack { display: grid; gap: 0.6rem; margin-top: 0.75rem; }
.inline { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.75rem; }
.meta { color: var(--muted); font-size: 0.85rem; }
.empty { color: var(--muted); }
.avatar { width: 2rem; height: 2rem; border-radius: 50%; background: var(--veil-strong); display: inline-grid; place-items: center; font-weight: 600; flex: none; }
.pill { display: inline-block; border-radius: 999px; padding: 0.05rem 0.55rem; font-size: 0.75rem; background: var(--veil-strong); color: var(--ink); margin-left: 0.35rem; text-decoration: none; }
.pill.muted { background: var(--veil); color: var(--muted); }
.links { list-style: none; padding: 0; margin: 0.6rem 0 0; display: grid; gap: 0.4rem; }
.links li { display: flex; align-items: center; gap: 0.35rem; flex-wrap: wrap; }
details summary { cursor: pointer; color: var(--muted); font-size: 0.85rem; margin-top: 0.5rem; }
blockquote { margin: 0.75rem 0 0; padding: 0.6rem 0.8rem; background: var(--rail); border-radius: var(--radius); white-space: pre-wrap; overflow-wrap: anywhere; }
.flash { padding: 0.6rem 0.9rem; border-radius: var(--radius); background: var(--veil-strong); margin-bottom: 1rem; }
.flash.error { background: rgba(127, 29, 29, 0.08); color: var(--danger); }
.secret { display: grid; grid-template-columns: 1fr auto; gap: 0.4rem 0.75rem; align-items: center; background: var(--canvas); border-radius: var(--radius); box-shadow: inset 0 0 0 1px var(--line); padding: 0.6rem 0.8rem; margin: 0.4rem 0 0.6rem; }
.secret-label { grid-column: 1 / -1; font-size: 0.75rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.secret .hint { grid-column: 1 / -1; }
.steps { padding-left: 1.2rem; margin: 0.5rem 0; }
.feed, .thread { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.75rem; }
.feed .preview { white-space: pre-wrap; overflow-wrap: anywhere; }
.thread li { display: grid; gap: 0.25rem; max-width: 80%; }
.thread li.mine { justify-self: end; text-align: right; }
.bubble { background: var(--rail); border-radius: 14px; padding: 0.6rem 0.85rem; white-space: pre-wrap; overflow-wrap: anywhere; text-align: left; }
.thread li.mine .bubble { background: var(--ink); color: #fff; }
.policy-row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 0.6rem 0; border-top: 1px solid var(--line); }

@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .rail { flex-direction: row; flex-wrap: wrap; align-items: center; border-right: 0; border-bottom: 1px solid var(--line); }
  .mark { padding-bottom: 0.3rem; }
  .rail-foot { margin: 0 0 0 auto; grid-auto-flow: column; padding: 0; }
  .thread li { max-width: 100%; }
}