:root{
  --blue:#2563eb;--blue-d:#1e40af;--blue-l:#eff6ff;--ink:#0f172a;--slate:#64748b;
  --line:#e2e8f0;--bg:#f1f5f9;--card:#ffffff;--ok:#16a34a;--red:#dc2626;--amber:#f59e0b;
  --radius:16px;--shadow:0 8px 30px rgba(15,23,42,.08);
}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Sarabun",Tahoma,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55;}
.wrap{max-width:1120px;margin:0 auto;padding:16px;}
a{color:var(--blue);}
button{font-family:inherit;cursor:pointer;}

/* ---------- navbar ---------- */
.nav{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px;}
.nav .brand{display:flex;align-items:center;gap:12px;}
.nav .logo{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--blue-d));display:flex;align-items:center;justify-content:center;font-size:22px;}
.nav .brand h1{font-size:17px;font-weight:800;line-height:1.2;}
.nav .brand p{font-size:11.5px;color:var(--slate);}
.nav .right{display:flex;align-items:center;gap:10px;}
.clock{font-size:13px;font-weight:700;color:var(--blue-d);background:var(--blue-l);padding:8px 12px;border-radius:10px;display:flex;align-items:center;gap:6px;}
.btn{padding:9px 15px;border:none;border-radius:10px;background:var(--blue);color:#fff;font-weight:700;font-size:14px;}
.btn.ghost{background:#fff;color:var(--blue);border:1.5px solid var(--line);}
.btn.sm{padding:6px 11px;font-size:12.5px;border-radius:8px;}
.btn.ok{background:var(--ok);}.btn.red{background:var(--red);}.btn.amber{background:var(--amber);}
.btn.gray{background:#e2e8f0;color:#475569;}
.btn:disabled{opacity:.5;}

/* ---------- cards / sections ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:16px;}
.card h2{font-size:16px;font-weight:800;margin-bottom:4px;display:flex;align-items:center;gap:8px;}
.card .desc{font-size:12.5px;color:var(--slate);margin-bottom:14px;}
.section-title{font-size:13px;font-weight:800;color:var(--blue-d);text-transform:none;margin:18px 0 8px;}

/* ---------- room availability cards ---------- */
.rooms-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;}
.rc{border:1px solid var(--line);border-radius:13px;padding:14px;position:relative;background:#fff;transition:.15s;}
.rc .name{font-size:14px;font-weight:800;margin-bottom:6px;padding-right:60px;}
.rc .cap{font-size:12.5px;color:var(--slate);}
.rc .st{position:absolute;top:12px;right:12px;font-size:11px;font-weight:800;padding:4px 10px;border-radius:999px;}
.rc.free{border-color:#bbf7d0;background:#f0fdf4;}
.rc.busy{border-color:#fecaca;background:#fef2f2;}
.rc.locked{border-color:#e2e8f0;background:#f8fafc;}
.st.free{background:#dcfce7;color:#166534;}
.st.busy{background:#fee2e2;color:#991b1b;}
.st.locked{background:#e2e8f0;color:#475569;}
.rc .next{font-size:11.5px;color:#94a3b8;margin-top:7px;}

/* ---------- schedule embed ---------- */
.sched-frame{width:100%;border:none;border-radius:12px;min-height:420px;background:#fff;}

/* ---------- info / rules ---------- */
.rules-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px;}
.rule{display:flex;gap:10px;align-items:flex-start;background:#f8fafc;border:1px solid var(--line);border-radius:11px;padding:12px;}
.rule .ic{font-size:20px;}
.rule b{font-size:13px;}
.rule p{font-size:12px;color:var(--slate);}

/* ---------- admin tabs ---------- */
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px;border-bottom:2px solid var(--line);padding-bottom:0;}
.tab{padding:10px 16px;border:none;background:transparent;font-weight:700;font-size:14px;color:var(--slate);border-bottom:3px solid transparent;margin-bottom:-2px;}
.tab.active{color:var(--blue-d);border-bottom-color:var(--blue);}

/* ---------- filters ---------- */
.filters{display:flex;gap:9px;flex-wrap:wrap;align-items:end;margin-bottom:12px;}
.filters .f{display:flex;flex-direction:column;gap:4px;}
.filters label{font-size:11.5px;font-weight:700;color:#475569;}
.filters input,.filters select{padding:8px 10px;border:1.5px solid var(--line);border-radius:9px;font-size:13px;font-family:inherit;}
.filters input:focus,.filters select:focus{outline:none;border-color:var(--blue);}

/* ---------- stat cards ---------- */
.statbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px;}
.sb{flex:1;min-width:110px;background:linear-gradient(135deg,#fff,#f8fafc);border:1px solid var(--line);border-radius:12px;padding:12px 14px;}
.sb .n{font-size:23px;font-weight:800;}
.sb .l{font-size:11.5px;color:var(--slate);}
.sb.p .n{color:var(--amber);}.sb.a .n{color:var(--ok);}.sb.r .n{color:var(--red);}.sb.t .n{color:var(--blue-d);}

/* ---------- tables ---------- */
.table-scroll{max-height:620px;overflow:auto;border:1px solid var(--line);border-radius:12px;}
table.data{border-collapse:collapse;width:100%;font-size:13px;}
table.data th{position:sticky;top:0;background:var(--blue-d);color:#fff;padding:10px 11px;text-align:left;font-size:12px;font-weight:700;white-space:nowrap;z-index:2;}
table.data td{padding:9px 11px;border-bottom:1px solid var(--line);vertical-align:middle;}
table.data tr:hover td{background:#f8fafc;}
table.data .clickable{cursor:pointer;color:var(--blue-d);font-weight:700;text-decoration:underline dotted;}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11px;font-weight:800;white-space:nowrap;}
.b-pending{background:#fef3c7;color:#92400e;}
.b-approved{background:#dcfce7;color:#166534;}
.b-rejected{background:#fee2e2;color:#991b1b;}
.b-cancelled{background:#e2e8f0;color:#475569;}
.rowc-pending{border-left:4px solid var(--amber);}
.rowc-approved{border-left:4px solid var(--ok);}
.rowc-rejected{border-left:4px solid var(--red);}
.rowc-cancelled{border-left:4px solid #94a3b8;}
.empty{text-align:center;color:var(--slate);padding:34px;font-size:14px;}

/* ---------- room manager ---------- */
.room-form{display:flex;gap:9px;flex-wrap:wrap;align-items:end;background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:13px;margin-bottom:14px;}
.room-form .f{display:flex;flex-direction:column;gap:4px;}
.room-form label{font-size:11.5px;font-weight:700;color:#475569;}
.room-form input{padding:9px 11px;border:1.5px solid var(--line);border-radius:9px;font-size:14px;font-family:inherit;}

/* ---------- modal ---------- */
.overlay{position:fixed;inset:0;background:rgba(15,23,42,.5);display:none;align-items:center;justify-content:center;z-index:100;padding:16px;}
.overlay.show{display:flex;}
.modal{background:#fff;border-radius:16px;max-width:520px;width:100%;max-height:90vh;overflow:auto;box-shadow:0 20px 60px rgba(0,0,0,.3);}
.modal .mh{background:linear-gradient(135deg,var(--blue),var(--blue-d));color:#fff;padding:16px 18px;display:flex;justify-content:space-between;align-items:center;}
.modal .mh h3{font-size:16px;font-weight:800;}
.modal .mh .x{background:rgba(255,255,255,.2);border:none;color:#fff;width:30px;height:30px;border-radius:8px;font-size:18px;}
.modal .mb{padding:18px;}
.dl{display:grid;grid-template-columns:110px 1fr;gap:8px 12px;font-size:13.5px;}
.dl dt{font-weight:700;color:#475569;}
.modal .acts{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);}
.modal input,.modal textarea{width:100%;padding:10px;border:1.5px solid var(--line);border-radius:9px;font-family:inherit;font-size:14px;margin-top:6px;}

/* ---------- login ---------- */
.login-box{max-width:360px;margin:0 auto;}
.login-box label{display:block;font-size:13px;font-weight:700;margin:12px 0 5px;}
.login-box input{width:100%;padding:11px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;}
.login-box input:focus{outline:none;border-color:var(--blue);}

/* ---------- settings ---------- */
.setting-row{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid var(--line);gap:12px;}
.setting-row .info b{font-size:14px;}
.setting-row .info p{font-size:12px;color:var(--slate);}
.switch{position:relative;width:52px;height:30px;flex-shrink:0;}
.switch input{display:none;}
.switch .sl{position:absolute;inset:0;background:#cbd5e1;border-radius:999px;transition:.2s;}
.switch .sl:before{content:"";position:absolute;width:24px;height:24px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s;}
.switch input:checked + .sl{background:var(--ok);}
.switch input:checked + .sl:before{transform:translateX(22px);}
.diag{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px;}
.diag a{font-size:12.5px;padding:8px 12px;background:#f1f5f9;border-radius:9px;text-decoration:none;color:#475569;font-weight:600;}

.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:12px 20px;border-radius:11px;font-size:14px;opacity:0;transition:.25s;z-index:200;pointer-events:none;box-shadow:0 8px 24px rgba(0,0,0,.25);}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
.hidden{display:none!important;}

@media(max-width:640px){
  .dl{grid-template-columns:1fr;gap:2px 0;}
  .dl dt{margin-top:8px;}
  .nav .brand h1{font-size:15px;}
}
@media print{
  body{background:#fff;}
  .nav,.tabs,.filters,.no-print,.btn{display:none!important;}
  .card{box-shadow:none;border:none;page-break-inside:avoid;}
  #reportArea{display:block!important;}
}