:root{
  --bg:#f5f6f8;--card:#fff;--ink:#1c2230;--muted:#667085;--line:#e3e6ec;
  --brand:#1f4fd8;--brand-ink:#fff;
  --free:#e9f7ee;--free-ink:#1a6b3a;--busy:#fde9e7;--busy-ink:#9a2a1f;--closed:#eceef2;
  --radius:10px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#12151c;--card:#1b2029;--ink:#e8ebf2;--muted:#9aa3b5;--line:#2c3340;
    --brand:#6b8cff;--brand-ink:#0b1020;--free:#16301f;--free-ink:#7fd9a1;--busy:#3a1b18;--busy-ink:#ff9d92;--closed:#242a35}
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
header{background:var(--card);border-bottom:1px solid var(--line);padding:14px 16px;display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between}
header h1{font-size:18px;margin:0}
header nav a{color:var(--muted);text-decoration:none;font-size:14px}
.wrap{max-width:1180px;margin:0 auto;padding:16px}
.layout{display:grid;grid-template-columns:1fr 340px;gap:16px;align-items:start}
@media(max-width:900px){.layout{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.card h2{font-size:16px;margin:0 0 10px}
.toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
button,.btn{font:inherit;cursor:pointer;border:1px solid var(--line);background:var(--card);color:var(--ink);padding:7px 12px;border-radius:8px}
button.primary,.btn.primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand);font-weight:600}
button.danger{background:#b3261e;color:#fff;border-color:#b3261e}
button:disabled{opacity:.5;cursor:default}
input,select,textarea{font:inherit;width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink)}
label{display:block;font-size:13px;color:var(--muted);margin:10px 0 3px}
.legend{display:flex;gap:12px;font-size:12px;color:var(--muted);margin:6px 0 0;flex-wrap:wrap}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:4px;vertical-align:-2px}
/* meeting grid */
.grid{display:grid;grid-template-columns:56px repeat(2,minmax(0,1fr));grid-auto-rows:34px;gap:2px;position:relative}
.grid .h{grid-row:1;font-weight:600;font-size:13px;display:flex;align-items:center;justify-content:center;background:none}
.grid .t{font-size:12px;color:var(--muted);text-align:right;padding-right:6px;transform:translateY(-8px)}
.cell{border-radius:6px;border:0;padding:0;background:var(--free);color:var(--free-ink);font-size:12px}
.cell:hover{outline:2px solid var(--brand)}
.cell.closed{background:var(--closed);color:var(--muted);cursor:default;outline:0;
  background-image:repeating-linear-gradient(45deg,transparent 0 6px,rgba(128,128,128,.12) 6px 12px)}
.busy{background:var(--busy);color:var(--busy-ink);border-radius:6px;padding:4px 8px;font-size:12px;overflow:hidden;z-index:1;border-left:4px solid var(--busy-ink)}
.busy b{display:block;font-size:13px}
.busy .tag{font-size:11px;opacity:.8}
/* hotel */
.days{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px}
@media(max-width:700px){.days{grid-template-columns:repeat(2,1fr)}}
.day{border-radius:8px;padding:8px;min-height:88px;font-size:12px;border:0;text-align:left;background:var(--free);color:var(--free-ink)}
.day .d{font-weight:700;font-size:13px;margin-bottom:3px;display:block}
.day.busy{background:var(--busy);color:var(--busy-ink);border:0}
.day.closed{background:var(--closed);color:var(--muted);cursor:default}
.day.past{opacity:.5;cursor:default}
.roomtitle{font-weight:600;margin:12px 0 6px}
/* form */
.msg{padding:9px 11px;border-radius:8px;margin:10px 0;font-size:14px}
.msg.err{background:var(--busy);color:var(--busy-ink)}
.msg.ok{background:var(--free);color:var(--free-ink)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:8px;align-items:end}
.row2>div{min-width:0}
.row2 label{min-height:2.7em;display:flex;align-items:flex-end}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
.rec{border:1px dashed var(--line);border-radius:8px;padding:8px 10px;margin-top:10px}
.rec .preview{font-size:12px;color:var(--muted);margin-top:6px;max-height:110px;overflow:auto}
.rec .preview .bad{color:var(--busy-ink)}
.hint{font-size:12px;color:var(--muted);margin-top:4px}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;color:var(--muted);font-weight:600}
.pill{font-size:11px;padding:2px 7px;border-radius:99px;background:var(--closed)}
.hidden{display:none}
.center{max-width:520px;margin:40px auto}