/* Roundtable — slim top bar; landing, auth card, three-pane chat (groups | conversation | members & me), admin tables. */
:root {
  --bg: #F1F4F1; --panel: #FBFCFA; --fg: #14201C; --muted: #5B6B65; --line: #D5DDD8;
  --accent: #0E7C74; --accent-fg: #FFFFFF; --accent-soft: #DDEFEB;
  --agent: #8A5A0C; --agent-bg: #F6E7C8; --danger: #B3261E;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0D1513; --panel: #131D1A; --fg: #E6EEEA; --muted: #8FA39B; --line: #25342F;
    --accent: #3FC4B8; --accent-fg: #062421; --accent-soft: #173630;
    --agent: #E7B35A; --agent-bg: #3A2D12; --danger: #F2837C;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.6 var(--font); padding: 0 16px; display: flex; flex-direction: column; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.bar { display: flex; align-items: center; gap: 12px; padding: 12px 0; flex: none; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--fg); text-decoration: none; }
.logo svg { width: 26px; height: 26px; }
.logo small { font: 500 12px var(--mono); color: var(--muted); }
.l-top { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 2; }
.l-human { fill: var(--accent); }
.l-agent { fill: var(--agent-bg); stroke: var(--agent); stroke-width: 1.8; }
.bar nav { margin-left: auto; display: flex; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.navlink { padding: 6px 10px; border-radius: 8px; color: var(--muted); text-decoration: none; font-weight: 500; }
.navlink[aria-current="page"] { color: var(--fg); background: var(--accent-soft); }
.lang { border: 1px solid var(--line); background: var(--panel); border-radius: 8px; padding: 5px 10px; font: 500 12px var(--mono); }

.btn { background: var(--accent); color: var(--accent-fg); border: 0; border-radius: 10px; padding: 9px 16px; font-weight: 700; text-decoration: none; display: inline-block; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); font-weight: 500; }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn.danger { color: var(--danger); border-color: var(--danger); }
.push { margin-left: auto; }
.linkbtn { border: 0; background: transparent; color: var(--muted); font-size: 12px; text-decoration: underline; padding: 0; }
.linkbtn.danger { color: var(--danger); }

.page { flex: 1; overflow-y: auto; padding: 8px 0 48px; }
.wrap { max-width: 1080px; margin: 0 auto; }
.hero { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 32px; align-items: center; padding: 24px 0 40px; }
.eyebrow { font: 500 12px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.hero h1 { font-size: clamp(32px, 5.4vw, 56px); line-height: 1.1; margin: 10px 0 16px; text-wrap: balance; letter-spacing: -.01em; }
.hero p { color: var(--muted); font-size: 17px; max-width: 34em; margin: 0 0 24px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.table-art { width: 100%; max-width: 400px; justify-self: center; }
.table-art .ring { fill: none; stroke: var(--line); stroke-width: 1.5; }
.table-art .spoke { stroke: var(--line); stroke-width: 1.2; stroke-dasharray: 3 5; }
.table-art .top { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 2; }
.table-art .human { fill: var(--accent); }
.table-art .agentseat { fill: var(--agent-bg); stroke: var(--agent); stroke-width: 2; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; padding: 8px 0 40px; }
.feature { padding: 18px 20px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.feature h3 { font-size: 18px; margin: 0 0 6px; }
.feature p { margin: 0; color: var(--muted); }
.how { border-top: 1px solid var(--line); padding-top: 28px; }
.how h2 { font-size: 24px; margin: 0 0 16px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; counter-reset: s; }
.steps li { counter-increment: s; padding-left: 44px; position: relative; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--accent-fg); display: grid; place-items: center; font: 700 14px var(--mono); }
.steps b { display: block; }
.steps span { color: var(--muted); }

.auth { max-width: 380px; margin: 40px auto; padding: 28px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; }
.auth h1 { font-size: 24px; margin: 0 0 16px; }
.form { display: grid; gap: 10px; margin-top: 10px; }
.form label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input, textarea, select { width: 100%; border: 1px solid var(--line); background: var(--bg); border-radius: 10px; padding: 8px 10px; }
textarea { resize: vertical; }
.errline { color: var(--danger); margin: 0; font-size: 13px; }
.hint { color: var(--muted); font-size: 12px; }

#v-app { flex: 1; min-height: 0; display: grid; grid-template-columns: 260px minmax(0, 1fr) 320px; gap: 12px; padding-bottom: 12px; }
.pane { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; min-height: 0; min-width: 0; display: flex; flex-direction: column; overflow: hidden; }
.pane > header { padding: 12px 14px; border-bottom: 1px solid var(--line); flex: none; }
.pane h2 { font-size: 14px; margin: 0; }
.scroll { overflow-y: auto; min-height: 0; flex: 1; }
.glist, .dlist, .alist { list-style: none; margin: 0; padding: 6px; display: flex; flex-direction: column; gap: 2px; }
.gitem { width: 100%; text-align: left; border: 0; background: transparent; padding: 9px 10px; border-radius: 10px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.gitem:hover { background: var(--bg); }
.gitem[aria-current="true"] { background: var(--accent-soft); }
.gitem b, .gitem small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gitem small { color: var(--muted); }
.badge { background: var(--accent); color: var(--accent-fg); border-radius: 999px; font: 700 11px var(--mono); padding: 2px 7px; }
.badge.at { background: var(--agent-bg); color: var(--agent); }
.fold { border-top: 1px solid var(--line); padding: 10px 14px; flex: none; }
.fold.inner { border-top: 0; padding-top: 4px; }
.fold summary { cursor: pointer; font-weight: 500; color: var(--accent); }
.dlist { padding: 8px 0 0; gap: 8px; }
.ditem { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.ditem small { color: var(--muted); display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.empty { padding: 28px 18px; color: var(--muted); text-align: center; }
.empty b { display: block; color: var(--fg); font-size: 16px; margin-bottom: 4px; }

.chat-head { display: flex; flex-direction: column; gap: 2px; }
.chat-head h2 { font-size: 16px; }
.chat-head p { margin: 0; color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-head .who { font: 400 12px var(--mono); color: var(--muted); }
.more { text-align: center; padding: 10px 0 0; }
.msgs { padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.msg { display: grid; grid-template-columns: 32px minmax(0, 1fr); gap: 10px; }
.av { width: 32px; height: 32px; border-radius: 50%; background: hsl(var(--h, 170) 40% 42%); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 14px; flex: none; }
.av.agent { border-radius: 9px; background: var(--agent-bg); color: var(--agent); }
.meta { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.tag { font: 500 11px var(--mono); padding: 1px 6px; border-radius: 6px; background: var(--agent-bg); color: var(--agent); }
.time { font: 400 12px var(--mono); color: var(--muted); }
.msg .linkbtn { visibility: hidden; }
.msg:hover .linkbtn, .msg:focus-within .linkbtn { visibility: visible; }
.quote { border-left: 3px solid var(--line); padding-left: 8px; color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.body { white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.own .body { background: var(--accent-soft); padding: 7px 10px; border-radius: 4px 12px 12px 12px; display: inline-block; max-width: 100%; }
.msg.mention .body { box-shadow: inset 3px 0 0 var(--agent); padding-left: 10px; }
.composer { border-top: 1px solid var(--line); padding: 10px 12px; display: grid; gap: 8px; flex: none; }
.composer textarea { min-height: 64px; max-height: 200px; }
.line { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.replychip { display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--muted); background: var(--bg); border-radius: 8px; padding: 4px 8px; }
.replychip span { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.sect { padding: 12px 14px 4px; font: 500 12px var(--mono); color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.pad { padding: 4px 14px 10px; }
.copyrow { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.me { display: grid; grid-template-columns: 36px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 6px 14px 10px; }
.me small { color: var(--muted); display: block; overflow: hidden; text-overflow: ellipsis; }
.alist { padding: 4px 14px 8px; gap: 10px; }
.aitem { display: grid; grid-template-columns: 32px minmax(0, 1fr) auto; gap: 10px; align-items: center; }
.aitem b, .aitem small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.aitem small { color: var(--muted); }
.aitem .acts { display: flex; flex-direction: column; gap: 2px; align-items: flex-end; }
.auto { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; font-size: 12px; margin-top: 4px; cursor: pointer; }
.auto input { width: auto; }
.aitem .auto small { display: inline; white-space: normal; }
.tokenbox { border: 1px solid var(--agent); background: var(--agent-bg); color: var(--agent); border-radius: 12px; padding: 10px; display: grid; gap: 8px; }
.tokenbox textarea { font: 12px/1.5 var(--mono); color: var(--fg); background: var(--panel); }
.tokenbox .hint { color: var(--agent); }

.h-admin { font-size: 26px; margin: 12px 0 16px; }
.h-sub { font-size: 18px; margin: 28px 0 10px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.stat b { display: block; font-size: 26px; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: 13px; }
.tablewrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font: 500 12px var(--mono); color: var(--muted); letter-spacing: .06em; text-transform: uppercase; }
tr:last-child td { border-bottom: 0; }
td.num { font-variant-numeric: tabular-nums; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--fg); color: var(--bg); padding: 10px 16px; border-radius: 10px; max-width: calc(100% - 32px); z-index: 20; }
.tabs { display: none; }
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .table-art { max-width: 280px; order: -1; }
  #v-app { grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) auto; }
  #v-app .pane { display: none; }
  #v-app[data-pane="groups"] #p-groups, #v-app[data-pane="chat"] #p-chat, #v-app[data-pane="info"] #p-info { display: flex; }
  .tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; padding-top: 4px; }
  .tabs button { border: 1px solid var(--line); background: var(--panel); border-radius: 10px; padding: 9px 4px; font-weight: 500; }
  .tabs button[aria-pressed="true"] { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
  .msg .linkbtn { visibility: visible; }
}