:root{
  --bg:#f3f4f7; --card:#fff; --ink:#1c1f26; --muted:#6b7280; --line:#e5e7eb;
  --brand:#c0171d; --brand-d:#8f1013; --brand-l:#fdecec;
  --side:#15171c; --side-ink:#c7cbd3;
  --green:#15803d; --green-l:#e7f6ec; --amber:#b45309; --amber-l:#fef3c7;
  --red:#b91c1c; --red-l:#fee2e2; --blue:#1d4ed8; --blue-l:#e0ebff; --gray-l:#eceef2;
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hind Siliguri","Noto Sans Bengali",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.5}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.ico{vertical-align:middle;flex:none}
.muted{color:var(--muted)} .small{font-size:12px} .right{text-align:right} .center{text-align:center}
.nowrap{white-space:nowrap} .bold{font-weight:600} .mt{margin-top:16px} .mb{margin-bottom:16px} .mt0{margin-top:0}
.red{color:var(--red)} .green{color:var(--green)} .amber{color:var(--amber)}

/* layout */
.app{display:flex;min-height:100vh}
.sidebar{width:240px;background:var(--side);color:var(--side-ink);display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:50;overflow-y:auto}
.brand{background:#fff;margin:14px;border-radius:10px;padding:8px 10px;text-align:center}
.brand img{max-width:100%;height:46px;object-fit:contain}
.sidebar nav{padding:6px 10px;flex:1}
.nav-link{display:flex;align-items:center;gap:10px;color:var(--side-ink);padding:10px 12px;border-radius:9px;margin-bottom:2px;font-weight:500}
.nav-link:hover{background:#23262e;color:#fff;text-decoration:none}
.nav-link.active{background:var(--brand);color:#fff}
.side-foot{padding:12px 10px;border-top:1px solid #262a33}
.side-foot .muted{color:#8b91a0;padding:0 12px 8px}
.main{flex:1;margin-left:240px;min-width:0}
.topbar{display:flex;align-items:center;gap:12px;background:#fff;border-bottom:1px solid var(--line);padding:12px 24px;position:sticky;top:0;z-index:20}
.topbar h1{font-size:18px;margin:0;flex:1}
.top-actions{display:flex;gap:8px;flex-wrap:wrap}
.menu-btn{display:none;background:none;border:0;cursor:pointer;color:var(--ink);padding:4px}
.content{padding:24px;max-width:1280px}
.side-backdrop{display:none}

/* cards & grids */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:18px}
.card h2{font-size:15px;margin:0 0 12px;display:flex;align-items:center;gap:8px}
.card h2 .spacer{flex:1}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(3,1fr)} .g4{grid-template-columns:repeat(4,1fr)}
.g21{grid-template-columns:2fr 1fr}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;gap:14px;align-items:center}
.stat .ico-box{width:44px;height:44px;border-radius:11px;display:flex;align-items:center;justify-content:center;background:var(--brand-l);color:var(--brand)}
.stat.green .ico-box{background:var(--green-l);color:var(--green)}
.stat.amber .ico-box{background:var(--amber-l);color:var(--amber)}
.stat.blue .ico-box{background:var(--blue-l);color:var(--blue)}
.stat .num{font-size:22px;font-weight:700;line-height:1.1}
.stat .lbl{color:var(--muted);font-size:12px}

/* tables */
.table-wrap{overflow-x:auto}
table.t{width:100%;border-collapse:collapse}
table.t th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:9px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
table.t td{padding:10px;border-bottom:1px solid #f0f1f4;vertical-align:middle}
table.t tr:hover td{background:#fafafb}
table.t td.num,table.t th.num{text-align:right;white-space:nowrap}
.cell-person{display:flex;align-items:center;gap:10px;min-width:180px}
.cell-person .nm{font-weight:600;color:var(--ink)}
.avatar{border-radius:50%;object-fit:cover;background:var(--gray-l);flex:none}
.avatar-txt{display:inline-flex;align-items:center;justify-content:center;font-weight:700;color:var(--brand);background:var(--brand-l);font-size:13px}
.empty{padding:26px;text-align:center;color:var(--muted)}

/* forms */
label{display:block;font-weight:600;font-size:12px;margin-bottom:4px;color:#374151}
input[type=text],input[type=number],input[type=date],input[type=password],input[type=email],input[type=tel],input[type=url],select,textarea{
  width:100%;padding:9px 11px;border:1px solid #d1d5db;border-radius:8px;font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid #f3b9bb;border-color:var(--brand)}
textarea{min-height:80px;resize:vertical}
.field{margin-bottom:14px}
.row{display:grid;gap:14px}
.r2{grid-template-columns:repeat(2,1fr)} .r3{grid-template-columns:repeat(3,1fr)} .r4{grid-template-columns:repeat(4,1fr)}
.checks{display:flex;flex-wrap:wrap;gap:6px 14px}
.checks label{font-weight:500;font-size:13px;margin:0;display:flex;align-items:center;gap:6px;cursor:pointer}
.checks input{width:auto}
.hint{font-size:12px;color:var(--muted);margin-top:3px}
.section-title{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--brand);font-weight:700;margin:6px 0 12px;padding-bottom:6px;border-bottom:1px solid var(--line)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:7px;padding:9px 15px;border-radius:9px;border:1px solid transparent;background:var(--brand);color:#fff;font:inherit;font-weight:600;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn:hover{background:var(--brand-d);text-decoration:none;color:#fff}
.btn-light{background:#fff;color:var(--ink);border-color:#d1d5db}
.btn-light:hover{background:#f3f4f6;color:var(--ink)}
.btn-green{background:var(--green)} .btn-green:hover{background:#116530}
.btn-wa{background:#1faa59} .btn-wa:hover{background:#17874a}
.btn-danger{background:#fff;color:var(--red);border-color:#f3b4b4} .btn-danger:hover{background:var(--red-l);color:var(--red)}
.btn-sm{padding:5px 10px;font-size:12px;border-radius:7px}
.btn-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}

/* badges / alerts / progress */
.badge{display:inline-block;padding:2px 9px;border-radius:99px;font-size:11px;font-weight:700}
.badge-green{background:var(--green-l);color:var(--green)} .badge-red{background:var(--red-l);color:var(--red)}
.badge-amber{background:var(--amber-l);color:var(--amber)} .badge-blue{background:var(--blue-l);color:var(--blue)}
.badge-gray{background:var(--gray-l);color:#4b5563}
.alert{padding:11px 14px;border-radius:9px;margin-bottom:14px;border:1px solid}
.alert-ok{background:var(--green-l);border-color:#b7e3c6;color:#14532d}
.alert-err{background:var(--red-l);border-color:#f3b4b4;color:#7f1d1d}
.alert-warn{background:var(--amber-l);border-color:#f6d98a;color:#78350f}
.alert-info{background:var(--blue-l);border-color:#b9cdfa;color:#1e3a8a}
.progress{height:7px;background:#e9ebf0;border-radius:9px;overflow:hidden;min-width:110px;margin-bottom:3px}
.progress-bar{height:100%;border-radius:9px}
.bar-green{background:#22a559} .bar-amber{background:#f59e0b} .bar-red{background:#dc2626}

/* tabs / filters */
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}
.tab{padding:7px 14px;border-radius:99px;background:#fff;border:1px solid var(--line);color:var(--ink);font-weight:600;font-size:13px}
.tab:hover{text-decoration:none;background:#f7f7f9}
.tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;margin-bottom:16px}
.filters .field{margin:0}
.pager{display:flex;gap:6px;flex-wrap:wrap;margin-top:14px}
.pager a,.pager span{padding:5px 11px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--ink)}
.pager span.cur{background:var(--ink);color:#fff;border-color:var(--ink)}

/* detail lists */
dl.kv{display:grid;grid-template-columns:150px 1fr;gap:7px 12px;margin:0}
dl.kv dt{color:var(--muted);font-size:12px;padding-top:2px}
dl.kv dd{margin:0;font-weight:500;word-break:break-word}
.profile-head{display:flex;gap:16px;align-items:center;margin-bottom:14px}
.profile-head .nm{font-size:20px;font-weight:700}

/* bar chart */
.bars{display:flex;align-items:flex-end;gap:14px;height:170px;padding-top:10px}
.bars .b{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%}
.bars .b .col{width:100%;max-width:56px;background:linear-gradient(180deg,#e0484e,#c0171d);border-radius:7px 7px 0 0;min-height:3px}
.bars .b .v{font-size:11px;font-weight:700;margin-bottom:4px}
.bars .b .m{font-size:11px;color:var(--muted);margin-top:6px}

/* attendance radios */
.att-opt{display:inline-flex;gap:0;border:1px solid #d1d5db;border-radius:8px;overflow:hidden}
.att-opt label{margin:0;padding:6px 14px;cursor:pointer;font-weight:700;font-size:13px;border-right:1px solid #d1d5db;background:#fff;color:#4b5563}
.att-opt label:last-child{border-right:0}
.att-opt input{display:none}
.att-opt input:checked + span{display:block}
.att-opt label.p:has(input:checked){background:var(--green);color:#fff}
.att-opt label.a:has(input:checked){background:var(--red);color:#fff}
.att-opt label.l:has(input:checked){background:var(--amber);color:#fff}
.att-opt label.on-p{background:var(--green);color:#fff}
.att-opt label.on-a{background:var(--red);color:#fff}
.att-opt label.on-l{background:var(--amber);color:#fff}

/* login */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#15171c 0%,#2a0f11 100%);padding:20px}
.login-card{background:#fff;border-radius:16px;padding:30px;width:100%;max-width:400px;box-shadow:0 20px 50px rgba(0,0,0,.4)}
.login-card img{display:block;margin:0 auto 14px;height:60px}
.login-card h1{text-align:center;font-size:18px;margin:0 0 18px}

/* responsive */
@media (max-width:1000px){
  .g4{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(2,1fr)} .g21{grid-template-columns:1fr}
}
@media (max-width:820px){
  .sidebar{transform:translateX(-100%);transition:transform .2s}
  body.nav-open .sidebar{transform:none}
  body.nav-open .side-backdrop{display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:40}
  .main{margin-left:0}
  .menu-btn{display:block}
  .content{padding:14px}
  .topbar{padding:10px 14px}
  .g2,.g3,.g4,.r2,.r3,.r4{grid-template-columns:1fr}
  dl.kv{grid-template-columns:120px 1fr}
}
@media print{.sidebar,.topbar,.no-print{display:none!important}.main{margin:0}.content{padding:0}}