:root{--bg:#ffffff;--fg:#0f172a;--muted:#64748b;--card:#f8fafc;--bub:#f1f5f9;--brand:#10a37f;--border:#e2e8f0}
[data-theme=dark]{--bg:#0b1220;--fg:#e5e7eb;--muted:#94a3b8;--card:#111827;--bub:#1e293b;--brand:#10a37f;--border:#1f2937}
*{box-sizing:border-box}
body{margin:0;font-family:Tahoma,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--fg);height:100vh;display:flex;flex-direction:column}
#app{display:flex;flex-direction:column;height:100vh}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border);gap:8px}
.brand{font-weight:bold}
.controls{display:flex;gap:8px;align-items:center}
select,.icon-btn,.ghost{background:var(--card);border:1px solid var(--border);color:var(--fg);border-radius:10px;padding:8px;cursor:pointer}
.ghost{padding:8px 14px}
.chat{flex:1;overflow:auto;padding:18px;max-width:820px;width:100%;margin:0 auto}
.msg{margin:10px 0;padding:12px 16px;border-radius:16px;max-width:82%;line-height:1.7;white-space:pre-wrap;animation:fade .25s ease}
.msg.user{margin-inline-start:auto;background:var(--brand);color:#fff;border-bottom-right-radius:4px}
.msg.ai{background:var(--bub);border-bottom-left-radius:4px}
.msg .src{font-size:11px;color:var(--muted);margin-top:6px}
.composer{display:flex;gap:10px;padding:14px;max-width:820px;width:100%;margin:0 auto}
#q{flex:1;padding:13px 16px;border-radius:14px;border:1px solid var(--border);background:var(--card);color:var(--fg);font-size:15px}
#sendBtn{padding:13px 22px;border:0;border-radius:14px;background:var(--brand);color:#fff;font-weight:bold;cursor:pointer}
.typing{display:inline-block;width:40px}.typing span{animation:blink 1.2s infinite}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1}}
@keyframes blink{0%,100%{opacity:.2}50%{opacity:1}}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.55);display:flex;align-items:center;justify-content:center;z-index:50}
.modal.hidden{display:none}
.modal-card{background:var(--bg);border:1px solid var(--border);border-radius:18px;padding:26px;width:340px;max-width:92vw;display:flex;flex-direction:column;gap:10px}
.modal-card input{padding:12px;border-radius:10px;border:1px solid var(--border);background:var(--card);color:var(--fg)}
.modal-card button{padding:12px;border:0;border-radius:10px;background:var(--brand);color:#fff;font-weight:bold;cursor:pointer}
.tabs{display:flex;gap:8px}.tabs button{flex:1;background:var(--card);color:var(--fg)}.tabs button.active{background:var(--brand);color:#fff}
.err{color:#f87171;font-size:13px;margin:0}.hidden{display:none}
.admin-link{position:fixed;bottom:80px;inset-inline-end:18px;background:var(--card);border:1px solid var(--border);padding:8px 12px;border-radius:12px;text-decoration:none;color:var(--fg)}
/* admin */
body.admin{flex-direction:row}
.sidebar{width:230px;background:var(--card);border-inline-end:1px solid var(--border);padding:18px;display:flex;flex-direction:column;gap:6px}
.sidebar nav{display:flex;flex-direction:column;gap:4px;margin-top:14px}
.sidebar a{padding:10px 12px;border-radius:10px;color:var(--fg);text-decoration:none;cursor:pointer}
.sidebar a.active,.sidebar a:hover{background:var(--brand);color:#fff}
.admin-main{flex:1;padding:26px;overflow:auto}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;margin-bottom:24px}
.stat{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px}
.stat b{font-size:26px;display:block}
table{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden}
th,td{padding:10px 12px;text-align:start;border-bottom:1px solid var(--border);font-size:13px}
.field{margin:10px 0}.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.field input,.field select{width:100%;padding:10px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--fg)}
.btn{padding:10px 16px;border:0;border-radius:10px;background:var(--brand);color:#fff;font-weight:bold;cursor:pointer}