:root{--navy:#14243b;--blue:#3269d7;--bg:#f4f6fa;--ink:#18263a;--muted:#748198;--line:#e7ebf2;--white:#fff;--green:#16845b}*{box-sizing:border-box}body{margin:0;font:14px Inter,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--ink)}.sidebar{position:fixed;inset:0 auto 0 0;width:252px;background:var(--navy);color:white;display:flex;flex-direction:column;padding:22px 14px;z-index:3}.brand{display:flex;align-items:center;gap:11px;padding:0 8px 25px}.brand b{display:block;font-size:15px;max-width:165px}.brand small{font-size:9px;color:#a8b7cf;letter-spacing:1.4px}.logo{width:37px;height:37px;border-radius:11px;background:#4c80e8;display:grid;place-items:center;font-weight:800}.sidebar nav{overflow:auto}.navgroup{font-size:10px;color:#889bb8;padding:17px 10px 7px;letter-spacing:1.2px}.navitem{width:100%;border:0;color:#ced8e7;background:transparent;text-align:left;border-radius:8px;padding:10px;cursor:pointer;font:inherit;display:flex;gap:12px;align-items:center}.navitem:hover,.navitem.active{background:#263b59;color:#fff}.ico{width:18px;text-align:center;color:#9cb8ed}.sidefoot{margin-top:auto;color:#8192ab;font-size:11px;padding:15px 8px}main{margin-left:252px}header{height:84px;background:white;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 34px;position:sticky;top:0;z-index:2}header small{font-size:10px;color:var(--muted);letter-spacing:1.2px}h1{font-size:22px;margin:5px 0 0}.topright{display:flex;align-items:center;gap:20px}.badge{padding:8px 12px;border-radius:20px;background:#e9f7f0;color:var(--green);font-size:12px}.avatar{border:0;background:#e8eefb;color:var(--blue);font-weight:700;border-radius:50%;width:36px;height:36px}#app{padding:28px 34px;max-width:1500px;margin:auto}.welcome{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.welcome h2{margin:0 0 5px;font-size:19px}.muted{color:var(--muted)}.btn{background:#fff;color:#34445c;border:1px solid var(--line);padding:9px 13px;border-radius:7px;cursor:pointer;font-weight:600}.btn:hover{border-color:#9bb3e7}.primary{background:var(--blue);color:#fff;border-color:var(--blue)}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin:18px 0}.card,.panel{background:#fff;border:1px solid var(--line);border-radius:11px;padding:18px}.cardtop{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.card strong{font-size:26px;display:block;margin:13px 0 7px}.trend{font-size:11px;color:var(--green)}.grid2{display:grid;grid-template-columns:1.5fr 1fr;gap:16px}.panel h3{margin:0 0 15px;font-size:15px}.toolbar{display:flex;gap:9px;align-items:center;margin:16px 0}.search{flex:1;max-width:360px;border:1px solid var(--line);border-radius:7px;padding:10px 12px;font:inherit}.tablewrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:10px}table{width:100%;border-collapse:collapse;min-width:720px}th,td{text-align:left;padding:13px 15px;border-bottom:1px solid #edf0f5;white-space:nowrap}th{font-size:10px;letter-spacing:.8px;color:#7a879b;background:#fafbfc}td{font-size:12px}.status{border-radius:20px;padding:5px 9px;background:#e9f7f0;color:#16845b;font-size:10px}.status.Unpaid,.status.Open{background:#fff2dc;color:#a76700}.status.Inactive,.status.Overdue{background:#ffebeb;color:#c44444}.actions{display:flex;gap:8px}.linkbtn{background:none;border:0;color:var(--blue);cursor:pointer;font-weight:600}.empty{padding:35px;text-align:center;color:var(--muted)}.settings{max-width:760px}.settings label,.fields label{display:grid;gap:6px;margin:12px 0;font-size:12px;color:#58677d}.settings input,.fields input,.fields select,.fields textarea{padding:10px;border:1px solid var(--line);border-radius:6px;font:inherit;color:var(--ink)}.fields{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}.fields label.full{grid-column:1/-1}.quick{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.quick button{background:#f7f9fc;border:1px solid var(--line);border-radius:8px;padding:14px;text-align:left;cursor:pointer;color:var(--ink)}.quick span{display:block;color:var(--muted);font-size:11px;margin-top:7px}.mobile{display:none}#toast{position:fixed;bottom:22px;right:22px;background:#16283e;color:white;border-radius:8px;padding:12px 17px;display:none;z-index:5}dialog{border:0;border-radius:12px;width:min(600px,95vw);padding:0;box-shadow:0 20px 70px #13253a40}dialog::backdrop{background:#14243b77}.modalhead,.modalfoot{padding:17px 21px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.modalhead h2{font-size:17px;margin:0}.modalhead .x{border:0;background:none;font-size:23px;color:var(--muted);cursor:pointer}.fields{padding:12px 21px}.modalfoot{border-top:1px solid var(--line);border-bottom:0;justify-content:flex-end;gap:8px}.chart{height:160px;display:flex;align-items:end;gap:12px;padding:12px 3px}.bar{flex:1;background:#dce7fc;border-radius:5px 5px 0 0;position:relative}.bar:nth-child(3n){background:#7ea1eb}.bar small{position:absolute;bottom:-21px;left:0;right:0;text-align:center;color:var(--muted);font-size:9px}@media(max-width:1000px){.cards{grid-template-columns:repeat(2,1fr)}.grid2{grid-template-columns:1fr}}@media(max-width:700px){.sidebar{transform:translateX(-100%);transition:.2s}.sidebar.open{transform:none}main{margin:0}header{padding:0 16px;height:72px}.mobile{display:block;border:0;background:none;font-size:20px}#app{padding:20px 15px}.cards{gap:9px}.card{padding:13px}.card strong{font-size:21px}.topright .badge{display:none}.quick{grid-template-columns:repeat(2,1fr)}.welcome{align-items:start;gap:10px}.fields{grid-template-columns:1fr}}
/* Network inspired visual finish */
:root{--navy:#102c46;--blue:#1687cf;--bg:#f1f7fb;--green:#16a779}body{background:radial-gradient(ellipse at 95% 0%,#dff3fb 0,transparent 30%),var(--bg)}.sidebar{background:linear-gradient(165deg,#0c263d,#123d5a 72%,#126b83)}.logo{background:linear-gradient(135deg,#22b6cf,#2d79e4);box-shadow:0 5px 18px #1687cf55}.navitem.active{background:linear-gradient(90deg,#1478b4,#175b83);box-shadow:inset 3px 0 #45d5d1}.card,.panel{box-shadow:0 5px 20px #163b5810}.card{border-top:3px solid #37acd0}.card:nth-child(2){border-top-color:#5b83e8}.card:nth-child(3){border-top-color:#27b58c}.card:nth-child(4){border-top-color:#f0ae4d}.primary{background:linear-gradient(110deg,#1687cf,#2468d2);box-shadow:0 4px 12px #1687cf30}.bar{background:linear-gradient(0deg,#c7e7f2,#e5f1ff)}.bar:nth-child(3n){background:linear-gradient(0deg,#1687cf,#68c6d4)}.developer{font-size:10px;color:#93aec5;padding:5px 8px 0}.settings hr{border:0;border-top:1px solid var(--line);margin:20px 0}
.loginbox{max-width:440px;margin:10vh auto;padding:28px}.loginbox form{display:flex;gap:8px}.loginbox input{flex:1;min-width:0;border:1px solid var(--line);border-radius:7px;padding:11px}

/* Expandable source-style navigation */
.nav-section{margin:2px 0}.nav-section>summary{list-style:none;display:flex;align-items:center;justify-content:space-between;cursor:pointer;user-select:none}.nav-section>summary::-webkit-details-marker{display:none}.nav-section[open]>summary{color:#fff}.nav-chevron{transition:transform .16s ease}.nav-section[open] .nav-chevron{transform:rotate(180deg)}.navchildren{padding:3px 0 7px 8px}.navchildren .navitem{font-size:13px;padding:9px 10px}.navchildren .ico{flex:0 0 18px}.nav-dashboard{margin-bottom:5px}.badge.amber{background:#fff3da;color:#986300}.preview-notice{margin:0 0 16px;padding:12px 15px;border:1px solid #f0d28c;border-radius:9px;background:#fff8e8;color:#735317;font-size:12px}.preview-notice strong{font-weight:750}.navgroup{width:100%;border:0;background:transparent;font:inherit;text-align:left}.nav-section>summary:hover{color:#fff;background:#1a3a56;border-radius:8px}
.integration-panel{margin:14px 0}.integration-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 16px}.integration-form label{display:grid;gap:6px;color:#58677d;font-size:12px}.integration-form input,.integration-form select{width:100%;min-width:0;padding:10px 11px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--ink);font:inherit}.integration-form input:focus,.integration-form select:focus{outline:2px solid #3269d733;border-color:var(--blue)}.integration-form .checkline{display:flex;align-items:center;gap:9px}.integration-form .checkline input{width:auto}.integration-form .row{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:8px}.integration-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.olt-profile{min-width:0}.olt-profile>.row{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:14px}.olt-profile>.row>strong{overflow-wrap:anywhere}.integration-note{margin:12px 0 0;padding:10px 12px;border-radius:7px;background:#f5f7fb;color:#52627a;font-size:12px;overflow-wrap:anywhere}.integration-note.error{background:#fff0f0;color:#a12b2b}.integration-panel code{overflow-wrap:anywhere}
@media(max-width:900px){.integration-list{grid-template-columns:1fr}}
@media(max-width:700px){.integration-form{grid-template-columns:1fr}.integration-form .row .btn{flex:1 1 100%}.olt-profile>.row{align-items:flex-start;flex-direction:column}.integration-list{gap:10px}}
@media(max-width:700px){.navchildren{padding-left:4px}.navchildren .navitem{padding:10px}.navgroup{padding:15px 10px 8px}}
.view-select{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:12px}.view-select select{max-width:240px;padding:9px 12px;background:#fff;border:1px solid var(--line);border-radius:7px;color:var(--ink);font:inherit}.loginbox{width:min(430px,100%);margin:8vh auto;padding:25px}.loginbrand{display:flex;align-items:center;gap:12px;margin-bottom:18px}.loginbrand h2{margin:0 0 4px}.loginbrand p{margin:0}.loginbox form{display:grid;gap:13px}.loginbox label{display:grid;gap:7px;color:#58677d;font-size:12px}.loginbox input{padding:12px;border:1px solid var(--line);border-radius:7px;font:inherit}.loginbox .primary{width:100%;padding:11px}.loginbox button:disabled{opacity:.65;cursor:wait}.login-message{min-height:18px;color:#a13e34;font-size:12px}.login-foot{font-size:11px;line-height:1.5}.signout{white-space:nowrap}@media(max-width:700px){.view-select{align-items:flex-start;flex-direction:column}.view-select select{max-width:100%;width:100%}.loginbox{margin:4vh auto;padding:20px}.signout{font-size:11px;padding:7px 9px}}
.signout{display:none}
/* Authentication gate: the app shell stays inaccessible until a server session exists. */
.auth-locked>.sidebar,.auth-locked>main{visibility:hidden;pointer-events:none}
.auth-gate{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:20px;background:var(--bg);overflow:auto}
.auth-wait{color:var(--muted);background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px}
.auth-gate .loginbox{width:min(430px,100%);margin:0;box-shadow:0 18px 55px #13253a1f}
.auth-gate[hidden]{display:none}

/* Customer navigation and collector portal polish */
.nav-section>summary.navgroup{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:42px;padding:12px 11px;margin:4px 0;border-radius:9px;color:#c4d2e4;cursor:pointer;list-style:none;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;transition:background .16s,color .16s}.nav-section>summary.navgroup::-webkit-details-marker{display:none}.nav-section>summary.navgroup:hover,.nav-section[open]>summary.navgroup{background:#ffffff12;color:#fff}.nav-chevron{font-size:15px;transition:transform .16s}.nav-section[open] .nav-chevron{transform:rotate(180deg)}.navchildren{padding:2px 0 8px 8px}.navchildren .navitem{min-height:39px;padding:9px 10px;font-size:13px}.navchildren .navitem.active{box-shadow:inset 3px 0 #37c3d1;background:#ffffff18}.collector-customer{display:flex;flex-direction:column;gap:3px}.integration-form button{align-self:end}.panel>.row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.integration-list>.panel{margin:0}.tablewrap td{vertical-align:middle}.tablewrap td .muted{font-size:11px;margin-top:3px}.tablewrap .btn{white-space:nowrap}
@media(max-width:700px){.nav-section>summary.navgroup{min-height:46px;font-size:12px}.tablewrap table{min-width:780px}.panel{padding:14px}.welcome{flex-wrap:wrap}.integration-form button{width:100%}}