/* ===== QLTC - giao diện ===== */
:root{
  --bg:#f1f5f9; --card:#fff; --ink:#0f172a; --muted:#64748b; --line:#e2e8f0;
  --brand:#1d4ed8; --brand-dark:#1e3a8a; --ok:#16a34a; --warn:#f59e0b;
  --danger:#dc2626; --info:#0891b2; --radius:12px;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--ink);font-size:14.5px;line-height:1.5}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0 0 .5rem}

.app{display:flex;min-height:100vh}

/* ---- Sidebar ---- */
.sidebar{width:236px;background:#0f172a;color:#cbd5e1;flex:0 0 236px;
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{padding:16px 14px;font-size:15px;color:#fff;display:flex;align-items:center;gap:8px;
  border-bottom:1px solid #1e293b}
.logo{display:inline-flex;width:28px;height:28px;border-radius:8px;background:var(--brand);
  color:#fff;align-items:center;justify-content:center;font-weight:700}
.sidebar nav{flex:1;padding:8px 0}
.nav-group{padding:14px 16px 6px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#64748b}
.nav-link{display:flex;align-items:center;gap:10px;padding:9px 16px;color:#cbd5e1;font-size:14px}
.nav-link:hover{background:#1e293b;color:#fff;text-decoration:none}
.nav-link.active{background:var(--brand);color:#fff;font-weight:600}
.nav-link .ic{width:20px;text-align:center}
.side-foot{padding:12px 14px;border-top:1px solid #1e293b;display:flex;
  align-items:center;justify-content:space-between;gap:8px}
.who{font-size:13px;color:#e2e8f0}
.who small{display:block;color:#64748b;font-size:11px;text-transform:uppercase}

/* ---- Main ---- */
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{background:#fff;border-bottom:1px solid var(--line);padding:12px 20px;
  display:flex;align-items:center;gap:12px;position:sticky;top:0;z-index:20}
.topbar h1{font-size:19px;margin:0;flex:1}
.top-actions{display:flex;gap:8px;flex-wrap:wrap}
.burger{display:none;background:none;border:0;font-size:20px;cursor:pointer}
.content{padding:20px;flex:1}
.foot{padding:14px 20px;color:var(--muted);font-size:12px;border-top:1px solid var(--line)}

/* ---- Card / grid ---- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;margin-bottom:16px}
.card h2{font-size:16px;margin-bottom:12px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.card-head h2{margin:0}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g23{grid-template-columns:2fr 1fr}

/* ---- Stat ---- */
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.stat-label{font-size:12.5px;color:var(--muted);margin-bottom:4px}
.stat-value{font-size:22px;font-weight:700;letter-spacing:-.02em}
.stat-sub{font-size:12px;color:var(--muted);margin-top:4px}
.stat.ok .stat-value{color:var(--ok)}
.stat.danger .stat-value{color:var(--danger)}
.stat.brand .stat-value{color:var(--brand)}
.stat.warn .stat-value{color:var(--warn)}

/* ---- Bảng ---- */
.table-wrap{overflow-x:auto}
table.tb{width:100%;border-collapse:collapse;background:#fff}
table.tb th,table.tb td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;
  vertical-align:middle}
table.tb th{background:#f8fafc;font-size:12.5px;color:#475569;font-weight:600;white-space:nowrap}
table.tb tbody tr:hover{background:#f8fafc}
table.tb td.num,table.tb th.num{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
.empty{padding:28px;text-align:center;color:var(--muted)}

/* ---- Form ---- */
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.field{display:flex;flex-direction:column;gap:4px}
.field.full{grid-column:1/-1}
label{font-size:12.5px;color:#475569;font-weight:600}
input[type=text],input[type=number],input[type=date],input[type=password],input[type=email],
input[type=search],select,textarea{
  width:100%;padding:8px 10px;border:1px solid #cbd5e1;border-radius:8px;font-size:14px;
  font-family:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid #bfdbfe;border-color:var(--brand)}
textarea{min-height:70px;resize:vertical}
.hint{font-size:11.5px;color:var(--muted)}
.form-actions{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}

/* ---- Nút ---- */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;
  border:1px solid transparent;background:var(--brand);color:#fff;font-size:13.5px;
  cursor:pointer;font-family:inherit;font-weight:600}
.btn:hover{background:var(--brand-dark);text-decoration:none;color:#fff}
.btn-sm{padding:4px 9px;font-size:12.5px}
.btn-ghost{background:#fff;color:#334155;border-color:#cbd5e1}
.btn-ghost:hover{background:#f1f5f9;color:#0f172a}
.btn-danger{background:var(--danger)}
.btn-danger:hover{background:#991b1b}
.btn-ok{background:var(--ok)}
.btn-ok:hover{background:#15803d}
.side-foot .btn-ghost{background:#1e293b;color:#cbd5e1;border-color:#334155}

/* ---- Badge / alert ---- */
.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11.5px;font-weight:600;
  background:#e2e8f0;color:#334155}
.badge.in{background:#dcfce7;color:#166534}
.badge.out{background:#fee2e2;color:#991b1b}
.badge.tf{background:#e0e7ff;color:#3730a3}
.badge.warn{background:#fef3c7;color:#92400e}
.alert{padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:14px;border:1px solid}
.alert-success{background:#dcfce7;border-color:#86efac;color:#14532d}
.alert-danger{background:#fee2e2;border-color:#fca5a5;color:#7f1d1d}
.alert-warning{background:#fef3c7;border-color:#fcd34d;color:#78350f}
.alert-info{background:#e0f2fe;border-color:#7dd3fc;color:#075985}

.pos{color:var(--ok);font-weight:600}
.neg{color:var(--danger);font-weight:600}
.muted{color:var(--muted)}

/* ---- Thanh tiến độ ---- */
.bar{display:inline-block;width:130px;height:9px;background:#e2e8f0;border-radius:999px;
  overflow:hidden;vertical-align:middle}
.bar-fill{display:block;height:100%;border-radius:999px;background:var(--ok)}
.bar-fill.warn{background:var(--warn)}
.bar-fill.danger{background:var(--danger)}
.bar-txt{font-size:12px;margin-left:6px;font-weight:600;color:var(--ok)}
.bar-txt.warn{color:var(--warn)}
.bar-txt.danger{color:var(--danger)}

/* ---- Biểu đồ thuần CSS/SVG ---- */
.chart-bars{display:flex;align-items:flex-end;gap:10px;height:180px;padding-top:10px}
.cb{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:4px;height:100%}
.cb .pair{display:flex;gap:3px;align-items:flex-end;height:100%;width:100%;justify-content:center}
.cb .b{width:14px;border-radius:4px 4px 0 0;min-height:2px}
.cb .b.i{background:#22c55e}
.cb .b.e{background:#ef4444}
.cb small{font-size:11px;color:var(--muted)}
.legend{display:flex;gap:14px;font-size:12px;color:var(--muted);margin-top:8px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:5px}

.hbar-row{display:grid;grid-template-columns:150px 1fr 110px;gap:10px;align-items:center;
  padding:6px 0;font-size:13px}
.hbar{height:14px;background:#e2e8f0;border-radius:6px;overflow:hidden}
.hbar span{display:block;height:100%;background:var(--brand);border-radius:6px}

/* ---- Bộ lọc ---- */
.filters{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end;margin-bottom:14px}
.filters .field{min-width:135px}

/* ---- Đính kèm ---- */
.att-list{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.att-thumb img{width:46px;height:46px;object-fit:cover;border-radius:6px;border:1px solid var(--line)}
.att-file{font-size:12px;background:#f1f5f9;padding:4px 8px;border-radius:6px}

/* ---- Phân trang ---- */
.pager{display:flex;gap:4px;margin-top:14px;align-items:center;flex-wrap:wrap}
.pager a{padding:5px 10px;border:1px solid var(--line);border-radius:7px;background:#fff;font-size:13px}
.pager a.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.pager span{color:var(--muted);padding:0 3px}

/* ---- Nhập nhanh ---- */
.quick{display:flex;gap:8px}
.quick input{flex:1;font-size:15px;padding:11px 14px}

/* ---- Đăng nhập ---- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#1e3a8a,#0f172a);padding:20px}
.login-box{background:#fff;border-radius:16px;padding:30px;width:100%;max-width:380px;
  box-shadow:0 20px 50px rgba(0,0,0,.3)}
.login-box h1{font-size:20px;text-align:center;margin-bottom:4px}
.login-box p.sub{text-align:center;color:var(--muted);font-size:13px;margin:0 0 20px}

/* ---- Tabs ---- */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;flex-wrap:wrap}
.tabs a{padding:8px 14px;border-radius:8px 8px 0 0;font-size:13.5px;color:#475569}
.tabs a.active{background:#fff;border:1px solid var(--line);border-bottom-color:#fff;
  margin-bottom:-1px;font-weight:600;color:var(--brand)}

/* ---- Đáp ứng màn hình nhỏ ---- */
@media(max-width:1000px){.g4{grid-template-columns:repeat(2,1fr)}.g23,.g3{grid-template-columns:1fr}}
@media(max-width:760px){
  .sidebar{position:fixed;left:-240px;z-index:50;transition:left .2s}
  .sidebar.open{left:0}
  .burger{display:block}
  .g2,.g4,.form-grid{grid-template-columns:1fr}
  .content{padding:14px}
  .hbar-row{grid-template-columns:110px 1fr 90px;font-size:12px}
}
@media print{.sidebar,.topbar,.foot,.btn,.filters{display:none!important}.content{padding:0}}