:root{
  --green:#1f6f54; --green-d:#185941; --green-l:#ddede6;
  --ink:#1f2933; --muted:#6b7280; --line:#e5e7eb; --bg:#f4f6f8;
  --white:#fff; --danger:#c0392b; --warn:#b7791f; --radius:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:"Nirmala UI","Hind Siliguri","Noto Sans Bengali","Segoe UI",system-ui,sans-serif;
  background:var(--bg); color:var(--ink); font-size:15px; line-height:1.6;
}
a{color:inherit;text-decoration:none}

/* ---------- Layout ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{
  width:240px;background:var(--green);color:#eaf3ef;flex-shrink:0;
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
}
.brand{display:flex;align-items:center;gap:8px;padding:18px 18px;font-weight:700;
  font-size:16px;border-bottom:1px solid rgba(255,255,255,.12)}
.brand-mark{font-size:20px}
.nav{display:flex;flex-direction:column;padding:10px 0;overflow-y:auto}
.nav-link{padding:11px 20px;color:#d6e6df;border-left:3px solid transparent;transition:.15s}
.nav-link:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-link.is-active{background:rgba(255,255,255,.14);border-left-color:#fff;color:#fff;font-weight:600}

.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{
  display:flex;align-items:center;gap:14px;background:var(--white);
  padding:12px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;
}
.menu-btn{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:var(--ink)}
.page-title{font-size:18px;font-weight:700;flex:1}
.user-box{display:flex;align-items:center;gap:10px;font-size:13px}
.user-name{font-weight:600}
.user-role{background:var(--green-l);color:var(--green-d);padding:2px 8px;border-radius:20px;font-size:11px}
.logout{color:var(--danger);font-weight:600}
.content{padding:22px;flex:1}
.foot{padding:14px 22px;color:var(--muted);font-size:12px;border-top:1px solid var(--line)}

.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:30}

/* ---------- Cards / stats ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:22px}
.stat{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.stat .num{font-size:26px;font-weight:700;color:var(--green-d)}
.stat .lbl{color:var(--muted);font-size:13px;margin-top:4px}

.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:10px;flex-wrap:wrap}
.card-head h2{font-size:16px}

/* ---------- Buttons ---------- */
.btn{display:inline-block;background:var(--green);color:#fff;border:none;border-radius:8px;
  padding:9px 16px;font-size:14px;cursor:pointer;font-family:inherit;transition:.15s}
.btn:hover{background:var(--green-d)}
.btn-sm{padding:5px 11px;font-size:12.5px}
.btn-light{background:#eef1f3;color:var(--ink)}
.btn-light:hover{background:#e2e6ea}
.btn-danger{background:var(--danger)}
.btn-danger:hover{background:#962d22}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
th{background:#f8fafb;color:var(--muted);font-weight:600;font-size:12.5px;text-transform:uppercase;letter-spacing:.03em}
tbody tr:hover{background:#fafbfc}
.badge{padding:2px 9px;border-radius:20px;font-size:12px;font-weight:600}
.badge-on{background:#e3f6ec;color:#1f7a4d}
.badge-off{background:#fdecea;color:var(--danger)}
.actions{display:flex;gap:6px}

/* ---------- Forms ---------- */
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.field{display:flex;flex-direction:column;gap:5px}
.field label{font-size:13px;font-weight:600;color:#374151}
.field input,.field select,.field textarea{
  padding:9px 11px;border:1px solid #d1d5db;border-radius:8px;font-size:14px;font-family:inherit;background:#fff;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px var(--green-l)}
.form-actions{margin-top:16px;display:flex;gap:10px}

/* ---------- Alerts ---------- */
.alert{padding:11px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}
.alert-success{background:#e3f6ec;color:#1f7a4d;border:1px solid #b6e3c9}
.alert-error{background:#fdecea;color:var(--danger);border:1px solid #f5c6c0}
.alert-warn{background:#fef6e7;color:var(--warn);border:1px solid #f6e3bd}

.empty{text-align:center;color:var(--muted);padding:30px}

/* ---------- Login ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1f6f54,#123c2d);padding:20px}
.login-card{background:#fff;border-radius:14px;padding:34px;width:100%;max-width:380px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.login-card .brand{border:none;justify-content:center;color:var(--green-d);font-size:18px;padding:0 0 6px}
.login-sub{text-align:center;color:var(--muted);font-size:13px;margin-bottom:22px}
.login-card .field{margin-bottom:14px}
.login-card .btn{width:100%;padding:11px}

/* ---------- Mobile ---------- */
@media (max-width:860px){
  .sidebar{position:fixed;left:0;top:0;z-index:40;transform:translateX(-100%);transition:transform .25s}
  .sidebar.open{transform:translateX(0)}
  .menu-btn{display:block}
  .overlay.show{display:block}
  .user-role{display:none}
}