:root {
  --bg: #f6f3ee; --panel: #ffffff; --sunk: #efebe4; --line: #e3ddd3; --line-strong: #d3cbbd;
  --ink: #1d1c1a; --ink-2: #5d5951; --ink-3: #8b867c;
  --accent: #1f5f5b; --accent-ink: #ffffff; --accent-soft: #e2efed; --accent-line: #b9d6d2;
  --ai: #6a4fb0; --ai-soft: #efeafa; --warn: #a3501b; --warn-soft: #fbeee3; --bad: #b3261e; --good: #2e7d4f;
  --radius: 12px; --radius-sm: 8px; --shadow: 0 1px 2px rgba(30,25,15,.05), 0 4px 16px rgba(30,25,15,.05);
  --font: ui-sans-serif, -apple-system, "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151614; --panel: #1d1f1c; --sunk: #232622; --line: #2e322d; --line-strong: #3d423b;
    --ink: #ecebe6; --ink-2: #b2b0a8; --ink-3: #85837b;
    --accent: #6cc0b6; --accent-ink: #0f1f1d; --accent-soft: #1d3330; --accent-line: #2f5551;
    --ai: #b59cf2; --ai-soft: #2a2440; --warn: #e3a06f; --warn-soft: #3a2a1d; --bad: #f2867e; --good: #7fcf9c;
    --shadow: 0 1px 2px rgba(0,0,0,.3); color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink); font: 15px/1.5 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.hidden { display: none !important; }

/* buttons */
.btn, .card button { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid transparent; background: var(--accent); color: var(--accent-ink); padding: 8px 14px; border-radius: 999px; font-weight: 600; font-size: 14px; }
.btn:hover { filter: brightness(1.06); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.ghost, .card button.ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn.quiet { background: transparent; color: var(--ink-2); border-color: transparent; padding: 4px 8px; font-weight: 500; }
.btn.quiet:hover { background: var(--sunk); color: var(--ink); }
.btn.danger { background: transparent; color: var(--bad); border-color: var(--line-strong); }

/* single-card pages (join, sign in, consent) */
body.solo { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.card { width: 100%; max-width: 440px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 28px; box-shadow: var(--shadow); }
.card h1 { font-size: 22px; margin: 14px 0 10px; letter-spacing: -.01em; }
.card p { margin: 0 0 12px; }
.card ul { padding-left: 18px; margin: 0 0 18px; }
.card label { display: block; font-weight: 600; font-size: 14px; margin: 14px 0; }
.card input { display: block; width: 100%; margin-top: 6px; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--panel); font-weight: 400; }
.card .row { display: flex; gap: 10px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; letter-spacing: -.01em; }
.quiet { color: var(--ink-2); }
.err { color: var(--bad); }

/* app shell */
.app { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.side { position: sticky; top: 0; height: 100vh; overflow-y: auto; border-right: 1px solid var(--line); background: var(--panel); padding: 18px 12px; display: flex; flex-direction: column; gap: 18px; }
.side .brand { padding: 0 8px; }
.nav-group h6 { margin: 0 0 6px; padding: 0 10px; font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); font-weight: 650; }
.nav-item { display: flex; align-items: center; gap: 10px; width: 100%; text-align: left; border: 0; background: transparent; padding: 7px 10px; border-radius: var(--radius-sm); color: var(--ink-2); font-size: 14.5px; }
.nav-item:hover { background: var(--sunk); color: var(--ink); }
.nav-item.on { background: var(--accent-soft); color: var(--ink); font-weight: 600; }
.nav-item .count { margin-left: auto; font-size: 12px; color: var(--ink-3); font-weight: 500; }
.nav-item .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.nav-item.child { padding-left: 28px; }
.side .spacer { flex: 1; }
.side .who { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-top: 1px solid var(--line); padding-top: 14px; font-size: 14px; }
.main { min-width: 0; }
.top { display: none; }
.wrap { max-width: 760px; margin: 0 auto; padding: 28px 24px 80px; }
.head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.head h1 { margin: 0; font-size: 26px; letter-spacing: -.02em; line-height: 1.2; }
.head .sub { color: var(--ink-2); font-size: 14px; margin-top: 4px; }
.search { position: relative; flex: 1; max-width: 300px; min-width: 180px; }
.search input { width: 100%; padding: 8px 12px 8px 34px; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--panel); }
.search svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--ink-3); }

/* composer */
.composer { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 12px; margin-bottom: 22px; }
.composer textarea { width: 100%; border: 0; resize: vertical; min-height: 64px; background: transparent; padding: 6px; outline: none; }
.composer .title-in { width: 100%; border: 0; background: transparent; padding: 6px; font-weight: 650; outline: none; }
.composer .bar { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 10px; margin-top: 6px; }
.composer .bar .grow { flex: 1; }
.chip { border: 1px solid var(--line-strong); background: transparent; border-radius: 999px; padding: 3px 10px; font-size: 13px; color: var(--ink-2); }
.chip.on { background: var(--ink); color: var(--panel); border-color: var(--ink); }
.composer .extra { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.composer .extra input { flex: 1; min-width: 180px; padding: 7px 10px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--panel); }
.notice { padding: 10px 14px; border-radius: var(--radius-sm); background: var(--sunk); color: var(--ink-2); font-size: 14px; margin-bottom: 16px; }
.notice.warn { background: var(--warn-soft); color: var(--warn); }

/* entries */
.feed { display: flex; flex-direction: column; gap: 12px; }
.entry { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.entry .meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; color: var(--ink-3); }
.entry .meta b { color: var(--ink); font-weight: 600; font-size: 14px; }
.avatar { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-size: 12px; font-weight: 700; color: #fff; flex: none; }
.avatar.ai { border-radius: 8px; }
.tag { font-size: 11.5px; font-weight: 600; padding: 1px 8px; border-radius: 999px; background: var(--sunk); color: var(--ink-2); text-transform: capitalize; }
.tag.ai { background: var(--ai-soft); color: var(--ai); text-transform: none; }
.tag.decision { background: var(--accent-soft); color: var(--accent); }
.tag.question { background: var(--warn-soft); color: var(--warn); }
.entry h3 { margin: 10px 0 2px; font-size: 16px; letter-spacing: -.01em; }
.entry .body { margin-top: 8px; white-space: pre-wrap; word-wrap: break-word; }
.entry .body.clamp { max-height: 9.6em; overflow: hidden; -webkit-mask-image: linear-gradient(#000 60%, transparent); mask-image: linear-gradient(#000 60%, transparent); }
.entry .more-btn { margin-top: 4px; padding-left: 0; }
.entry .link { display: block; margin-top: 8px; font-size: 14px; word-break: break-all; }
.entry .file { display: inline-flex; gap: 8px; align-items: center; margin-top: 10px; padding: 6px 10px; border: 1px solid var(--line); border-radius: var(--radius-sm); font-size: 14px; text-decoration: none; color: var(--ink); }
.entry .file img { max-width: 100%; border-radius: 6px; display: block; }
.entry .acts { display: flex; gap: 2px; margin-left: auto; }
.entry .where { font-size: 12.5px; color: var(--ink-3); margin-top: 10px; }
.entry textarea, .entry input { width: 100%; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 8px; background: var(--panel); margin-top: 8px; }
.empty { text-align: center; padding: 48px 16px; color: var(--ink-2); border: 1px dashed var(--line-strong); border-radius: var(--radius); }
.empty b { color: var(--ink); display: block; font-size: 16px; margin-bottom: 4px; }
.more { display: flex; justify-content: center; margin-top: 16px; }

/* chat */
.chat { display: flex; flex-direction: column; gap: 12px; }
.abilities { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.bubble { padding: 12px 14px; border-radius: var(--radius); max-width: 92%; white-space: pre-wrap; word-wrap: break-word; }
.bubble.me { align-self: flex-end; background: var(--accent); color: var(--accent-ink); border-bottom-right-radius: 4px; }
.bubble.bot { align-self: flex-start; background: var(--panel); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.bubble .cite { display: inline; font-size: 12px; font-weight: 600; color: var(--accent); background: var(--accent-soft); border-radius: 6px; padding: 0 5px; border: 0; }
.bubble .foot { margin-top: 10px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 12.5px; color: var(--ink-3); white-space: normal; }
.chatbox { position: sticky; bottom: 0; display: flex; gap: 8px; padding: 12px 0 4px; background: linear-gradient(transparent, var(--bg) 30%); }
.chatbox textarea { flex: 1; resize: none; min-height: 46px; max-height: 160px; padding: 11px 14px; border: 1px solid var(--line-strong); border-radius: 22px; background: var(--panel); }
.typing { color: var(--ink-3); font-size: 14px; }

/* panels: members, history, settings */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.panel h2 { margin: 0 0 4px; font-size: 17px; letter-spacing: -.01em; }
.panel > p { margin: 0 0 14px; color: var(--ink-2); font-size: 14px; }
.rowline { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.rowline:first-of-type { border-top: 0; }
.rowline .grow { flex: 1; min-width: 0; }
.rowline .small { font-size: 13px; color: var(--ink-3); }
.ais { margin-left: 38px; }
.copy { display: flex; gap: 8px; align-items: center; background: var(--sunk); border-radius: var(--radius-sm); padding: 8px 10px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px; word-break: break-all; }
.copy span { flex: 1; }
ol.steps { margin: 10px 0 0; padding-left: 20px; color: var(--ink-2); font-size: 14px; }
ol.steps li { margin: 4px 0; }
.toggle { position: relative; width: 40px; height: 24px; flex: none; }
.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle span { position: absolute; inset: 0; background: var(--line-strong); border-radius: 999px; transition: background .15s; cursor: pointer; }
.toggle span::after { content: ""; position: absolute; width: 18px; height: 18px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: transform .15s; }
.toggle input:checked + span { background: var(--accent); }
.toggle input:checked + span::after { transform: translateX(16px); }
.toggle input:disabled + span { opacity: .5; cursor: default; }
.hist .action { font-weight: 600; }
.hist .undone { text-decoration: line-through; color: var(--ink-3); }
select.inline { padding: 6px 10px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--panel); }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--ink); color: var(--panel); padding: 10px 16px; border-radius: 999px; font-size: 14px; box-shadow: var(--shadow); z-index: 50; max-width: calc(100% - 32px); }
.toast.bad { background: var(--bad); color: #fff; }

/* landing (signed out) */
.landing { max-width: 520px; margin: 12vh auto; padding: 0 16px; }
.landing h1 { font-size: 34px; letter-spacing: -.025em; margin: 18px 0 8px; line-height: 1.15; }
.landing p { color: var(--ink-2); font-size: 16.5px; }

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .side { position: fixed; inset: 0 auto 0 0; width: 280px; z-index: 30; transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow); }
  .app.menu .side { transform: none; }
  .app.menu::after { content: ""; position: fixed; inset: 0; background: rgba(0,0,0,.3); z-index: 20; }
  .top { display: flex; align-items: center; gap: 10px; position: sticky; top: 0; z-index: 10; background: var(--panel); border-bottom: 1px solid var(--line); padding: 10px 16px; }
  .wrap { padding: 20px 16px 80px; }
  .head h1 { font-size: 22px; }
  .search { max-width: none; }
}