:root{
--bg:#0b1020;--panel:#121a2d;--panel2:#17223a;--line:#263452;
--text:#eef3ff;--muted:#93a4c5;--accent:#5b8cff;--green:#25d695;--red:#ff6577;
}
*{box-sizing:border-box}
body{margin:0;background:#0b1020;color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit;text-decoration:none}
.layout{display:flex;min-height:100vh}
.sidebar{width:245px;background:#0e1527;border-right:1px solid var(--line);padding:24px 16px;position:fixed;top:0;bottom:0}
.logo{display:flex;gap:12px;align-items:center;font-weight:700;margin-bottom:35px}
.logo span,.brand-mark{display:grid;place-items:center;width:46px;height:46px;border-radius:13px;background:var(--accent);font-weight:900}
.logo div{font-size:14px;line-height:1.25}
nav{display:grid;gap:7px}
nav a{padding:12px 14px;border-radius:10px;color:var(--muted)}
nav a:hover{background:var(--panel2);color:var(--text)}
.sidebar-foot{position:absolute;bottom:20px;left:18px;right:18px;color:#657594;font-size:11px}
.main{margin-left:245px;width:calc(100% - 245px);padding:30px;max-width:1500px}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:25px}
h1{font-size:28px;margin:0 0 5px}h2{font-size:17px;margin:0 0 18px}
.muted{color:var(--muted);font-size:13px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:18px}
.stat span{display:block;color:var(--muted);font-size:12px;margin-bottom:9px}
.stat strong{font-size:24px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:20px;margin-bottom:18px}
.panel-head{display:flex;justify-content:space-between;align-items:center}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:14px 10px;border-bottom:1px solid var(--line);text-align:left;font-size:13px;white-space:nowrap}
th{color:var(--muted);font-weight:600}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background:var(--panel2);color:var(--text);padding:9px 13px;border-radius:9px;font-size:13px;cursor:pointer}
.btn.primary{background:var(--accent);border-color:var(--accent)}
.btn.small{padding:6px 9px;font-size:12px}
.btn.full{width:100%;margin-top:15px}
.badge{display:inline-block;padding:5px 8px;border-radius:999px;font-size:10px;font-weight:800}
.badge.online{background:rgba(37,214,149,.13);color:var(--green)}
.badge.offline{background:rgba(255,101,119,.13);color:var(--red)}
.alert,.success{padding:12px 14px;border-radius:10px;margin-bottom:15px;font-size:13px}
.alert{background:rgba(255,101,119,.1);border:1px solid rgba(255,101,119,.25);color:#ff9aa8}
.success{background:rgba(37,214,149,.1);border:1px solid rgba(37,214,149,.25);color:#6af0bd}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.form-grid .wide{grid-column:1/-1}
label{display:block;color:var(--muted);font-size:12px;margin-bottom:7px}
input{width:100%;padding:11px 12px;border-radius:9px;border:1px solid var(--line);background:#0d1527;color:var(--text);outline:none}
input:focus{border-color:var(--accent)}
.chart-box{height:390px}
.period-tabs{display:flex;gap:8px;margin-bottom:18px}
.period-tabs a{padding:8px 13px;border:1px solid var(--line);border-radius:9px;color:var(--muted);font-size:12px}
.period-tabs a.active{background:var(--accent);border-color:var(--accent);color:#fff}
.empty{text-align:center;color:var(--muted);padding:30px}
.login-body{min-height:100vh;display:grid;place-items:center;padding:20px}
.login-card{width:min(410px,100%);background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:30px}
.login-card h1{font-size:22px;margin-top:16px}
.login-card form{margin-top:25px;display:grid;gap:10px}
.login-card label{margin-top:6px}
@media(max-width:900px){
.sidebar{position:static;width:100%;height:auto}.layout{display:block}.main{margin:0;width:100%;padding:18px}.sidebar-foot{display:none}.cards{grid-template-columns:1fr 1fr}.sidebar nav{display:flex}.logo{margin-bottom:15px}
}
@media(max-width:550px){.cards{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.form-grid .wide{grid-column:auto}.topbar{gap:10px}}