*{box-sizing:border-box}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;background:#0f172a;color:#e5e7eb}
header{display:flex;gap:12px;align-items:center;justify-content:space-between;padding:16px 20px;background:#111827;border-bottom:1px solid #1f2937;position:sticky;top:0}
h1{font-size:20px;margin:0}
main{max-width:980px;margin:20px auto;padding:0 12px}
.card{background:#111827;border:1px solid #1f2937;border-radius:16px;padding:16px 16px;margin-bottom:16px;box-shadow:0 10px 30px rgba(0,0,0,0.25)}
.row{display:grid;grid-template-columns:140px 1fr;gap:12px;align-items:center;margin-bottom:12px}
label{font-weight:600}
input,textarea,select,button{font:inherit}
input,textarea,select{background:#0b1220;border:1px solid #25324a;color:#e5e7eb;border-radius:12px;padding:10px 12px;width:100%}
textarea{resize:vertical}
summary{cursor:pointer;font-weight:700;margin:12px 0}
.table-tools{display:flex;gap:8px;margin:8px 0}
table{width:100%;border-collapse:collapse}
th,td{border-bottom:1px solid #25324a;padding:8px}
tbody tr:hover{background:#0b1220}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
button{background:#2563eb;border:none;color:white;padding:10px 14px;border-radius:12px;cursor:pointer}
button.secondary{background:#334155}
button.danger{background:#b91c1c}
button:disabled{opacity:.6;cursor:not-allowed}
.status{min-height:20px;opacity:.9}
footer{padding:20px;text-align:center;color:#9ca3af}
.form-grid{display:grid;grid-template-columns:1fr;gap:24px}
.form-section{background:#0b1220;border-radius:12px;padding:16px;margin-bottom:16px}
.form-section h3{margin:0 0 16px;font-size:14px;color:#cbd5e1}
.form-section h4{margin:16px 0 8px;font-size:13px;color:#94a3b8}
.field-group{margin-bottom:12px}
.field-group label{display:block;margin-bottom:4px;font-size:12px;color:#94a3b8}
.meter-section{margin-bottom:20px}
.meter-readings{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
@media (min-width:768px){.form-grid{grid-template-columns:1fr 1fr}}
