:root{
  --bg:#eef1fa;
  --surface:#ffffff;
  --ink:#161a2e;
  --muted:#6b7086;
  --line:#e4e7f2;
  --primary:#4453f0;
  --primary-deep:#3140c9;
  --primary-soft:#eceeff;
  --amber:#f5a524;
  --amber-soft:#fff4e0;
  --good:#17a672;
  --good-soft:#e6f8f1;
  --bad:#e5484d;
  --bad-soft:#fdecec;
  --radius:16px;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI','Inter',Helvetica,Arial,sans-serif;
  --mono:'SFMono-Regular',Menlo,Consolas,monospace;
  --shadow: 0 1px 2px rgba(22,26,46,.04), 0 8px 24px -12px rgba(22,26,46,.15);
}
*{box-sizing:border-box;}
body{
  margin:0;font-family:var(--sans);background:var(--bg);color:var(--ink);
  -webkit-font-smoothing:antialiased;
}
button{font-family:var(--sans);cursor:pointer;}
input,select,textarea{font-family:var(--sans);}
a{text-decoration:none;}

/* ---------- LOGIN ---------- */
.login-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:
    radial-gradient(circle at 15% 20%, rgba(68,83,240,.16), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(245,165,36,.14), transparent 40%),
    var(--bg);
  padding:20px;
}
.login-card{
  width:100%;max-width:380px;background:var(--surface);border-radius:20px;
  box-shadow:var(--shadow);padding:36px 32px;
}
.login-logo{
  width:52px;height:52px;border-radius:14px;
  background:linear-gradient(135deg,var(--primary),#7b6bf5);
  display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px;
  box-shadow:0 8px 20px -8px rgba(68,83,240,.6);
}
.login-card h1{font-size:19px;margin:0 0 4px;letter-spacing:-0.01em;}
.login-card p.sub{color:var(--muted);font-size:13px;margin:0 0 24px;}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px;}
.field label{font-size:12px;font-weight:600;color:var(--muted);}
.field input, .field select{
  border:1.5px solid var(--line);border-radius:10px;padding:11px 13px;font-size:14px;
  background:#fbfbfe;transition:border-color .15s;
}
.field input:focus, .field select:focus{outline:none;border-color:var(--primary);background:#fff;}
.btn{
  border:none;border-radius:10px;padding:11px 18px;font-size:14px;font-weight:700;
  background:var(--primary);color:#fff;transition:background .15s, transform .1s;
  display:inline-flex;align-items:center;gap:6px;
}
.btn:hover{background:var(--primary-deep);}
.btn:active{transform:scale(.98);}
.btn.block{width:100%;justify-content:center;}
.btn.amber{background:var(--amber);color:#402c00;}
.btn.amber:hover{background:#e0940f;}
.btn.ghost{background:transparent;color:var(--bad);border:1.5px solid var(--bad);}
.btn.ghost:hover{background:var(--bad-soft);}
.btn.subtle{background:var(--primary-soft);color:var(--primary-deep);}
.btn.subtle:hover{background:#dfe2ff;}
.btn.sm{padding:7px 12px;font-size:12.5px;border-radius:8px;}
.login-error{
  background:var(--bad-soft);color:var(--bad);font-size:12.5px;padding:9px 12px;
  border-radius:8px;margin-bottom:14px;
}
.login-hint{
  margin-top:20px;padding-top:16px;border-top:1px dashed var(--line);
  font-size:11.5px;color:var(--muted);line-height:1.6;
}
.login-hint code{background:var(--primary-soft);padding:1px 5px;border-radius:4px;color:var(--primary-deep);}

/* ---------- APP SHELL ---------- */
.shell{min-height:100vh;}
header.topbar{
  background:var(--surface);border-bottom:1px solid var(--line);
  padding:14px 24px;display:flex;align-items:center;justify-content:space-between;
  position:sticky;top:0;z-index:20;flex-wrap:wrap;gap:10px;
}
.brand{display:flex;align-items:center;gap:10px;}
.brand .mark{
  width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--primary),#7b6bf5);
  display:flex;align-items:center;justify-content:center;font-size:16px;
}
.brand h1{font-size:15.5px;margin:0;letter-spacing:-0.01em;}
.brand .period-chip{font-family:var(--mono);font-size:11px;color:var(--muted);}
.user-chip{display:flex;align-items:center;gap:10px;}
.user-chip .avatar{
  width:30px;height:30px;border-radius:50%;background:var(--amber-soft);color:#8a5a00;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:12px;
}
.user-chip .info{display:flex;flex-direction:column;line-height:1.25;}
.user-chip .info b{font-size:12.5px;}
.role-pill{font-size:10.5px;font-weight:700;padding:2px 9px;border-radius:20px;text-transform:uppercase;letter-spacing:.03em;}
.role-pill.admin{background:var(--primary-soft);color:var(--primary-deep);}
.role-pill.petugas{background:var(--amber-soft);color:#8a5a00;}

nav.tabs{max-width:1100px;margin:0 auto;padding:16px 24px 0;display:flex;gap:6px;flex-wrap:wrap;}
nav.tabs a{
  background:transparent;border:none;padding:9px 16px;font-size:13.5px;font-weight:600;
  color:var(--muted);border-radius:10px 10px 0 0;
}
nav.tabs a.active{background:var(--surface);color:var(--primary-deep);}
nav.tabs a:hover{color:var(--ink);}

main{max-width:1100px;margin:0 auto;padding:20px 24px 60px;}

.alert{padding:12px 16px;border-radius:10px;font-size:13px;margin-bottom:16px;font-weight:600;}
.alert.success{background:var(--good-soft);color:var(--good);}
.alert.error{background:var(--bad-soft);color:var(--bad);}

.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:18px;}
.stat-card{
  background:var(--surface);border-radius:14px;box-shadow:var(--shadow);
  padding:16px 18px;text-align:center;border-top:3px solid var(--primary);
}
.stat-card.good{border-top-color:var(--good);}
.stat-card.warn{border-top-color:var(--bad);}
.stat-card .stat-num{font-family:var(--mono);font-size:22px;font-weight:800;color:var(--ink);}
.stat-card .stat-lbl{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.03em;margin-top:2px;}

.card{
  background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:22px 24px;margin-bottom:18px;
}
.card h2{margin:0 0 4px;font-size:15px;letter-spacing:-0.01em;}
.card p.hint{margin:0 0 16px;color:var(--muted);font-size:12.5px;}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;}

table{width:100%;border-collapse:collapse;font-size:13.5px;}
th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);
   border-bottom:1.5px solid var(--line);padding:9px 8px;}
td{padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:middle;}
td.num, th.num{text-align:right;font-family:var(--mono);}
tr:last-child td{border-bottom:none;}
tfoot td{font-weight:800;border-top:2px solid var(--ink);font-family:var(--mono);}
td input{width:100%;}
.row-actions{display:flex;gap:6px;align-items:center;}
.row-actions form{margin:0;}

.empty{text-align:center;padding:34px 10px;color:var(--muted);font-size:13.5px;
       border:1.5px dashed var(--line);border-radius:12px;}

/* house grid cards */
.house-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;}
.house-card{
  background:var(--surface);border:1.5px solid var(--line);border-radius:14px;
  padding:16px;cursor:pointer;transition:transform .12s, box-shadow .12s, border-color .12s;
  position:relative;
}
.house-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--primary);}
.house-card .no{font-size:16px;font-weight:800;letter-spacing:-0.01em;}
.house-card .nama{font-size:12.5px;color:var(--muted);margin-top:2px;}
.house-card .status{
  position:absolute;top:14px;right:14px;font-size:10px;font-weight:700;padding:3px 8px;
  border-radius:20px;background:var(--bad-soft);color:var(--bad);
}
.house-card.done .status{background:var(--good-soft);color:var(--good);}
.house-card .kwh-preview{margin-top:10px;font-family:var(--mono);font-size:12px;color:var(--primary-deep);font-weight:700;}

/* modal */
.overlay{
  position:fixed;inset:0;background:rgba(20,22,40,.45);display:flex;align-items:center;justify-content:center;
  z-index:100;padding:20px;
}
.modal{
  background:var(--surface);border-radius:18px;padding:26px 26px 22px;width:100%;max-width:380px;
  box-shadow:0 30px 60px -20px rgba(0,0,0,.4);
}
.modal h3{margin:0 0 2px;font-size:16px;}
.modal p.sub{margin:0 0 18px;color:var(--muted);font-size:12.5px;}
.modal .field input[type=number]{font-family:var(--mono);}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:18px;}
.locked-note{font-size:11.5px;color:var(--muted);margin-top:-8px;margin-bottom:14px;}
.locked-note button{background:none;border:none;color:var(--primary);font-weight:700;font-size:11.5px;padding:0;text-decoration:underline;cursor:pointer;}

.total-strip{
  display:flex;justify-content:space-between;align-items:center;
  background:linear-gradient(135deg,var(--ink),#2a2f52);color:#fff;padding:16px 20px;border-radius:14px;
  margin-top:14px;flex-wrap:wrap;gap:8px;
}
.total-strip .lbl{font-size:11.5px;letter-spacing:.04em;text-transform:uppercase;color:#b9bcd6;}
.total-strip .amt{font-family:var(--mono);font-size:21px;font-weight:800;color:var(--amber);}

.badge{font-family:var(--mono);font-size:11px;padding:2px 8px;border-radius:20px;background:var(--good-soft);color:var(--good);}
.badge.warn{background:var(--bad-soft);color:var(--bad);}

.toast{
  position:fixed;bottom:22px;left:50%;transform:translateX(-50%);
  background:var(--ink);color:#fff;padding:10px 20px;border-radius:24px;
  font-size:13px;opacity:0;pointer-events:none;transition:opacity .25s;box-shadow:var(--shadow);
  z-index:200;
}
.toast.show{opacity:1;}

@media (max-width:640px){
  header.topbar{padding:12px 16px;}
  main{padding:16px 16px 50px;}
  nav.tabs{padding:12px 16px 0;}
  .card{padding:18px 16px;}
}