:root{
  --navy:#0f2742; --navy-light:#16385c; --accent:#2563eb; --accent2:#0ea5e9;
  --bg:#f4f6f9; --card:#ffffff; --text:#1e293b; --muted:#64748b;
  --border:#e2e8f0; --ok:#16a34a; --warn:#d97706; --late:#dc2626;
}
*{box-sizing:border-box;}
body{margin:0;font-family:'Segoe UI',Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);}
a{text-decoration:none;color:inherit;}
.layout{display:flex;min-height:100vh;}

/* Sidebar */
.sidebar{width:230px;background:linear-gradient(180deg,var(--navy),var(--navy-light));color:#fff;flex-shrink:0;}
.sidebar .brand{padding:20px 18px;font-weight:700;font-size:17px;border-bottom:1px solid rgba(255,255,255,.1);}
.sidebar nav{padding:14px 0;}
.sidebar nav a{display:flex;align-items:center;gap:10px;padding:11px 20px;color:#cbd5e1;font-size:14px;border-left:3px solid transparent;}
.sidebar nav a:hover, .sidebar nav a.active{background:rgba(255,255,255,.08);color:#fff;border-left-color:var(--accent2);}
.sidebar .section-label{padding:14px 20px 6px;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:#7f93ab;}

/* Main */
.main{flex:1;display:flex;flex-direction:column;min-width:0;}
.topbar{background:#fff;border-bottom:1px solid var(--border);padding:12px 24px;display:flex;justify-content:space-between;align-items:center;}
.topbar .title{font-size:18px;font-weight:600;}
.topbar .user-chip{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted);}
.content{padding:24px;flex:1;}

/* Cards / tables */
.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:20px;}
.card h3{margin-top:0;}
.grid{display:grid;gap:16px;}
.grid-4{grid-template-columns:repeat(4,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
@media(max-width:900px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr 1fr;}}

.stat{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:18px;}
.stat .num{font-size:28px;font-weight:700;}
.stat .lbl{color:var(--muted);font-size:13px;margin-top:4px;}

table{width:100%;border-collapse:collapse;font-size:13.5px;}
table th, table td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left;}
table th{background:#f8fafc;color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em;}
table tr:hover{background:#f8fafc;}

.badge{color:#fff;padding:3px 9px;border-radius:20px;font-size:11.5px;font-weight:600;}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:6px;}
.dot.ok{background:var(--ok);} .dot.warn{background:var(--warn);} .dot.late{background:var(--late);} .dot.none{background:#cbd5e1;}

.btn{display:inline-block;padding:9px 16px;border-radius:7px;border:none;background:var(--accent);color:#fff;font-size:14px;cursor:pointer;}
.btn:hover{background:#1d4ed8;}
.btn.secondary{background:#fff;border:1px solid var(--border);color:var(--text);}
.btn.secondary:hover{background:#f1f5f9;}
.btn.danger{background:var(--late);}
.btn.sm{padding:5px 11px;font-size:12.5px;}

form .field{margin-bottom:14px;}
form label{display:block;font-size:13px;font-weight:600;margin-bottom:5px;color:#334155;}
form input, form select, form textarea{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:7px;font-size:14px;font-family:inherit;}
form input:focus, form select:focus, form textarea:focus{outline:2px solid #93c5fd;border-color:var(--accent);}

.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:20px;}
.tabs a{padding:10px 16px;font-size:14px;color:var(--muted);border-bottom:2px solid transparent;}
.tabs a.active{color:var(--accent);border-color:var(--accent);font-weight:600;}

.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px;}
.alert.success{background:#dcfce7;color:#166534;}
.alert.error{background:#fee2e2;color:#991b1b;}

.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--navy),var(--navy-light));}
.login-box{background:#fff;padding:36px;border-radius:12px;width:360px;box-shadow:0 20px 50px rgba(0,0,0,.25);}
.login-box h2{margin-top:0;text-align:center;color:var(--navy);}
.muted{color:var(--muted);font-size:13px;}
.section-title{font-size:13px;text-transform:uppercase;color:var(--muted);letter-spacing:.05em;margin:24px 0 10px;font-weight:700;}