:root{
  /* Avgerinos brand */
  --green:#7fb539; --green-d:#688f2d; --lime:#b1d659;
  --brown:#9e7b4f; --brown-d:#856538;
  --ink:#2e3020; --muted:#7c826d;
  --bg:#f6f3ec; --panel:#fffefb; --line:#e9e2d4;
  --ok:#1a9d54; --red:#cf2e2e;
  --font:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --head:'Lexend',var(--font);
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.55 var(--font)}
h1,h2{font-family:var(--head)}
a{color:var(--green-d);text-decoration:none}
a:hover{text-decoration:underline}
.mono,.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* header */
.topbar{display:flex;align-items:center;gap:24px;background:var(--panel);
  border-bottom:1px solid var(--line);padding:11px 24px;position:sticky;top:0;z-index:10;
  box-shadow:0 1px 0 rgba(46,48,32,.02)}
.brand{display:flex;align-items:center;gap:11px}
.brand .mark{height:30px;width:auto;display:block}
.brand-name{font-family:var(--head);font-weight:600;font-size:18px;color:var(--ink);letter-spacing:.01em}
.brand-name b{font:600 10.5px/1 var(--font);color:#fff;background:var(--green);
  padding:3px 7px;border-radius:6px;margin-left:9px;letter-spacing:.08em;vertical-align:2px}
.topbar nav{margin-left:auto;display:flex;gap:20px}
.topbar nav a{color:var(--muted);font-weight:500}
.topbar nav a:hover{color:var(--green-d)}

main{max-width:1280px;margin:0 auto;padding:26px 24px 60px}
h1{font-size:25px;margin:0 0 4px;font-weight:600}
h2{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin:28px 0 10px;font-weight:600}
.sub{color:var(--muted);margin:0 0 4px}
.muted{color:var(--muted);font-weight:400;font-size:12px}
.back{display:inline-block;color:var(--muted);margin-bottom:10px}
.back:hover{color:var(--green-d)}

/* hero */
.hero{display:flex;align-items:center;justify-content:space-between;gap:24px;
  background:linear-gradient(120deg,#fffefb,#f3f6ea);border:1px solid var(--line);
  border-radius:16px;padding:22px 26px;margin-bottom:24px}
.hero-logo{height:62px;width:auto;opacity:.96}

/* stat cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:26px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px;
  position:relative;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--green)}
.card:nth-child(2)::before{background:var(--brown)}
.card:nth-child(3)::before{background:var(--lime)}
.card.warn::before{background:var(--brown-d)}
.card.warn{background:#faf4ea}
.card .num{font-size:27px;font-weight:700;font-family:var(--head)}
.card .lbl{color:var(--muted);font-size:12px;margin-top:2px}

/* tables */
table.grid{width:100%;border-collapse:collapse;background:var(--panel);
  border:1px solid var(--line);border-radius:14px;overflow:hidden}
.grid th,.grid td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.grid tbody tr:last-child td{border-bottom:0}
.grid thead th{background:#faf7f0;color:var(--muted);font-weight:600;font-size:11.5px;
  text-transform:uppercase;letter-spacing:.03em;position:sticky;top:0}
.grid tbody tr:hover{background:#f4f7ec}
.grid .r{text-align:right}
.grid.data tbody tr{cursor:pointer}
.grid.data td{max-width:280px;overflow:hidden;text-overflow:ellipsis}

.scroll{overflow:auto;max-height:70vh;border-radius:14px;border:1px solid var(--line)}
.scroll .grid{border:0}

/* badges & source colours (mirror the logo: BC=green, Calculus=brown) */
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:11px;font-weight:600}
.badge.green{background:#eaf3da;color:var(--green-d)}
.badge.red{background:#fbe8e8;color:var(--red)}
.badge.blue{background:#eaf3da;color:var(--green-d)}
.badge.brown{background:#f1e7d6;color:var(--brown-d)}
.src-BC{color:var(--green-d);font-weight:600}
.src-CALCULUS{color:var(--brown-d);font-weight:600}

.btn{display:inline-block;background:var(--green);color:#fff;padding:6px 13px;border-radius:9px;
  font-weight:600;font-size:13px;border:0;cursor:pointer}
.btn:hover{text-decoration:none;background:var(--green-d)}
.btn.ghost{background:#eee8db;color:var(--ink)}
.btn.ghost:hover{background:#e4ddcc}

.filters{display:flex;gap:10px;align-items:center;margin:6px 0 16px;flex-wrap:wrap}
.filters input[type=search]{flex:1;min-width:240px;padding:8px 12px;border:1px solid var(--line);border-radius:9px;background:#fff;font:inherit}
.filters select{padding:8px 12px;border:1px solid var(--line);border-radius:9px;background:#fff;font:inherit}
.filters button{padding:8px 14px;border:0;border-radius:9px;background:var(--green);color:#fff;font-weight:600;cursor:pointer}
.filters button:hover{background:var(--green-d)}
.filters .count{margin-left:auto;color:var(--muted)}

.pager{display:flex;align-items:center;gap:14px;justify-content:center;margin-top:16px;color:var(--muted)}
.kv th{width:280px;color:var(--muted);font-weight:600}
.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:920px;margin-top:8px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px 22px}
.panel h2{margin-top:0}
.panel label{font-weight:600;color:var(--ink);font-size:13px;display:block;margin-bottom:6px}
.panel select{display:block;margin-bottom:16px;padding:9px 12px;border:1px solid var(--line);border-radius:9px;background:#fff;font:inherit;min-width:260px}
.panel .grid.kv{margin-bottom:16px}
@media(max-width:760px){.settings-grid{grid-template-columns:1fr}}
.json{background:#262a1c;color:#e6ecd6;padding:18px;border-radius:14px;overflow:auto;font-size:12.5px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;max-height:60vh}
.empty{background:var(--panel);border:1px dashed var(--line);border-radius:14px;padding:30px;color:var(--muted);text-align:center}

footer{max-width:1280px;margin:0 auto;padding:18px 24px;color:var(--muted);font-size:12px;
  border-top:1px solid var(--line);display:flex;align-items:center;gap:10px}
footer .footmark{height:20px;width:auto;opacity:.7}

/* --- auth --- */
.login-wrap { display: flex; justify-content: center; padding: 8vh 16px; }
.login-panel { max-width: 360px; width: 100%; display: flex; flex-direction: column; gap: 10px; text-align: center; }
.login-panel .mark { width: 56px; margin: 0 auto; }
.login-panel label { text-align: left; font-size: 13px; color: var(--muted, #666); }
.login-panel input { padding: 10px 12px; border: 1px solid #ccc; border-radius: 8px; font: inherit; }
.logout { display: inline-flex; align-items: center; gap: 10px; margin-left: 12px; }
.whoami { font-size: 13px; opacity: .75; }

/* --- chat --- */
.chat-layout { display: grid; grid-template-columns: 220px 1fr; gap: 16px; min-height: 70vh; }
.chat-side { display: flex; flex-direction: column; gap: 10px; }
.conv-list { list-style: none; padding: 0; margin: 0; overflow-y: auto; max-height: 65vh; }
.conv-list li { margin: 2px 0; }
.conv-list a { display: block; padding: 6px 10px; border-radius: 8px; text-decoration: none;
               font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-list li.active a { background: rgba(0,0,0,.07); font-weight: 600; }
.chat-main { display: flex; flex-direction: column; gap: 10px; }
.transcript { flex: 1; overflow-y: auto; padding: 8px; display: flex; flex-direction: column;
              gap: 10px; max-height: 65vh; border: 1px solid rgba(0,0,0,.08); border-radius: 12px; }
.msg.user { align-self: flex-end; max-width: 80%; }
.msg.user .bubble { background: rgba(0,0,0,.06); padding: 8px 12px; border-radius: 12px;
                    white-space: pre-wrap; }
.msg.assistant { align-self: stretch; max-width: 100%; }
.msg.assistant .md { line-height: 1.5; }
.msg.assistant .md table { border-collapse: collapse; margin: 8px 0; font-size: 13px; }
.msg.assistant .md th, .msg.assistant .md td { border: 1px solid rgba(0,0,0,.15); padding: 4px 8px; }
.msg.assistant .md code { background: rgba(0,0,0,.05); padding: 1px 4px; border-radius: 4px; }
.msg.assistant .md pre { background: rgba(0,0,0,.05); padding: 10px; border-radius: 8px; overflow-x: auto; }
.chip { align-self: flex-start; font-size: 12px; padding: 4px 10px; border-radius: 999px;
        background: rgba(0,0,0,.05); font-family: ui-monospace, monospace; max-width: 100%;
        overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip.ok { background: rgba(0,128,0,.10); }
.chip.err { background: rgba(200,0,0,.10); }
.chat-input { display: grid; grid-template-columns: auto 1fr auto auto; gap: 8px; align-items: end; }
.chat-input select { padding: 8px; border-radius: 8px; border: 1px solid #ccc; font: inherit; font-size: 13px; }
.chat-input textarea { padding: 10px 12px; border: 1px solid #ccc; border-radius: 10px;
                       font: inherit; resize: vertical; }
@media (max-width: 800px) {
  .chat-layout { grid-template-columns: 1fr; }
  .chat-side { order: 2; }
  .chat-input { grid-template-columns: 1fr; }
}