:root{
  --bg:#f4f6fa; --surface:#ffffff; --surface2:#f8fafc; --border:#e3e8ef;
  --text:#1a2233; --muted:#6b7688; --primary:#2f6bff; --primary-d:#1f4fd6;
  --green:#12a150; --green-bg:#e7f7ee; --red:#e02424; --red-bg:#fdeaea;
  --amber:#b7791f; --amber-bg:#fdf3e2; --grey:#94a3b8; --grey-bg:#eef1f6;
  --radius:12px; --shadow:0 1px 3px rgba(20,30,60,.08),0 1px 2px rgba(20,30,60,.04);
  --nav-w:224px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.45;-webkit-text-size-adjust:100%}
a{color:var(--primary);text-decoration:none}
h1,h2,h3{margin:0 0 .4em}
h1{font-size:22px}h2{font-size:18px}h3{font-size:15px}
.muted{color:var(--muted)}
.small{font-size:13px}
.mono{font-variant-numeric:tabular-nums}

/* ---------- Login ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(135deg,#eef2fb,#e8f0ff)}
.login-card{background:var(--surface);border-radius:16px;box-shadow:var(--shadow);padding:28px;width:100%;max-width:380px}
.login-card h1{font-size:20px}
.login-logo{font-weight:800;font-size:20px;color:var(--primary);margin-bottom:2px}
.login-demo{margin-top:16px;font-size:12.5px;background:var(--surface2);border:1px solid var(--border);border-radius:10px;padding:10px}
.login-demo b{color:var(--text)}
.login-demo button{margin:2px 3px 0 0;font-size:12px;padding:3px 8px}

/* ---------- Shell ---------- */
.shell{display:flex;min-height:100vh}
.nav{width:var(--nav-w);background:#101828;color:#c7d0de;flex-shrink:0;position:fixed;top:0;bottom:0;left:0;display:flex;flex-direction:column;padding:14px 10px;z-index:20}
.nav .brand{font-weight:800;color:#fff;font-size:16px;padding:6px 10px 14px}
.nav .brand small{display:block;font-weight:500;color:#8b97ab;font-size:11px;margin-top:2px}
.nav a{display:flex;align-items:center;gap:10px;color:#c7d0de;padding:9px 11px;border-radius:9px;font-size:14px;margin-bottom:2px;cursor:pointer}
.nav a .ic{width:18px;text-align:center;opacity:.9}
.nav a:hover{background:#1c2739;color:#fff}
.nav a.active{background:var(--primary);color:#fff}
.nav .spacer{flex:1}
.nav .who{font-size:12px;color:#8b97ab;padding:8px 11px;border-top:1px solid #1f2a3d;margin-top:6px}
.main{flex:1;margin-left:var(--nav-w);min-width:0}
.topbar{display:none}
.content{padding:20px;max-width:1180px;margin:0 auto}

/* ---------- Components ---------- */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:16px}
.card h2,.card h3{margin-top:0}
.row{display:flex;gap:14px;flex-wrap:wrap}
.grid{display:grid;gap:14px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.kpi{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 16px}
.kpi .v{font-size:24px;font-weight:750;letter-spacing:-.5px}
.kpi .l{font-size:12.5px;color:var(--muted);margin-top:2px}
.kpi.good .v{color:var(--green)}.kpi.bad .v{color:var(--red)}.kpi.warn .v{color:var(--amber)}

.btn{display:inline-flex;align-items:center;gap:6px;background:var(--primary);color:#fff;border:none;border-radius:9px;padding:9px 14px;font-size:14px;font-weight:600;cursor:pointer}
.btn:hover{background:var(--primary-d)}
.btn.sec{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn.sec:hover{background:var(--surface2)}
.btn.gh{background:transparent;color:var(--primary);padding:6px 8px}
.btn.sm{padding:5px 10px;font-size:13px}
.btn.danger{background:var(--red)}
.btn:disabled{opacity:.5;cursor:not-allowed}

.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;font-weight:600;white-space:nowrap}
.b-green{background:var(--green-bg);color:var(--green)}
.b-red{background:var(--red-bg);color:var(--red)}
.b-amber{background:var(--amber-bg);color:var(--amber)}
.b-grey{background:var(--grey-bg);color:var(--muted)}
.b-blue{background:#e8effe;color:var(--primary)}

table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--border)}
th{font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);font-weight:600}
tbody tr:hover{background:var(--surface2)}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.table-wrap{overflow-x:auto}

label{display:block;font-size:13px;color:var(--muted);margin:10px 0 4px}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:9px;font-size:14px;font-family:inherit;background:#fff;color:var(--text)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,107,255,.12)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}

.pagehead{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.pagehead h1{margin:0}
.crumb{cursor:pointer;color:var(--primary);font-size:13px;margin-bottom:8px;display:inline-block}

/* places grid */
.rooms{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.room{border:1px solid var(--border);border-radius:10px;padding:12px;background:var(--surface2)}
.room .rh{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.place{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:7px 9px;border-radius:8px;margin-bottom:6px;font-size:13.5px;border:1px solid var(--border);background:#fff}
.place.free{border-style:dashed;color:var(--muted)}
.place.occupied{border-left:3px solid var(--green)}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block;margin-right:6px}
.dot.free{background:var(--grey)}.dot.occupied{background:var(--green)}

/* matrix */
.matrix td,.matrix th{text-align:center;padding:7px 6px;font-size:13px}
.matrix td.addr,.matrix th.addr{text-align:left;position:sticky;left:0;background:var(--surface)}
.cell{border-radius:6px;padding:5px 4px;font-size:12px;font-weight:600}
.cell.paid{background:var(--green-bg);color:var(--green)}
.cell.unpaid{background:var(--grey-bg);color:var(--muted)}
.cell.overdue{background:var(--red-bg);color:var(--red)}
.cell.empty{color:#cbd3e0}

/* modal */
.modal-bg{position:fixed;inset:0;background:rgba(16,24,40,.5);display:flex;align-items:flex-start;justify-content:center;padding:24px;z-index:50;overflow:auto}
.modal{background:var(--surface);border-radius:14px;box-shadow:0 12px 40px rgba(16,24,40,.25);width:100%;max-width:520px;padding:20px;margin-top:20px}
.modal h2{margin-top:0}
.modal .actions{display:flex;gap:10px;justify-content:flex-end;margin-top:18px}

.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#101828;color:#fff;padding:11px 18px;border-radius:10px;font-size:14px;z-index:100;box-shadow:var(--shadow);max-width:90vw}
.toast.err{background:var(--red)}

.taskitem{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-bottom:1px solid var(--border)}
.taskitem .tt{flex:1}
.empty{text-align:center;color:var(--muted);padding:26px}

/* ---------- Mobile ---------- */
@media(max-width:900px){
  .nav{display:none}
  .main{margin-left:0;padding-bottom:64px}
  .topbar{display:flex;align-items:center;justify-content:space-between;background:#101828;color:#fff;padding:12px 16px;position:sticky;top:0;z-index:20}
  .topbar .brand{font-weight:800;font-size:16px}
  .topbar .who{font-size:12px;color:#9fb0c9}
  .content{padding:14px}
  .form-row{grid-template-columns:1fr}
  .tabbar{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--border);z-index:30}
  .tabbar a{flex:1;text-align:center;padding:8px 2px;font-size:11px;color:var(--muted);cursor:pointer}
  .tabbar a.active{color:var(--primary)}
  .tabbar a .ic{display:block;font-size:18px;margin-bottom:2px}
  .kpi .v{font-size:20px}
}
@media(min-width:901px){.tabbar{display:none}}