/* CRM webtui.vn - layout chung. Don gian, ro, nhanh. */
* { box-sizing: border-box; }
:root{
  --bg:#0f172a; --panel:#fff; --ink:#1e293b; --muted:#64748b; --line:#e2e8f0;
  --side:#111827; --side-ink:#cbd5e1; --side-active:#2563eb;
  --ok:#16a34a; --warn:#d97706; --bad:#dc2626; --info:#2563eb; --gray:#94a3b8; --purple:#7c3aed;
}
html,body{margin:0;height:100%;font-family:-apple-system,Segoe UI,Roboto,Arial,"Helvetica Neue",sans-serif;
  font-size:14px;color:var(--ink);background:#f1f5f9;}
.app{display:flex;min-height:100vh;}

/* Sidebar */
.sidebar{width:230px;background:var(--side);color:var(--side-ink);flex-shrink:0;display:flex;flex-direction:column;}
.brand{padding:18px 18px;font-size:18px;font-weight:700;color:#fff;border-bottom:1px solid #1f2937;}
.brand span{color:#60a5fa;font-weight:400;}
.sidebar nav{display:flex;flex-direction:column;padding:8px 0;flex:1;}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 18px;color:var(--side-ink);
  text-decoration:none;font-size:14px;border-left:3px solid transparent;}
.nav-item .ic{width:18px;text-align:center;}
.nav-item:hover{background:#1f2937;color:#fff;}
.nav-item.active{background:#0b1220;color:#fff;border-left-color:var(--side-active);font-weight:600;}
.nav-item.logout{margin-top:auto;border-top:1px solid #1f2937;color:#f87171;}

/* Content */
.content{flex:1;display:flex;flex-direction:column;min-width:0;}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;
  background:#fff;border-bottom:1px solid var(--line);}
.topbar h1{margin:0;font-size:18px;}
.topbar .user{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;}
.page{padding:24px;}

/* Cards / stats */
.grid{display:grid;gap:14px;}
.cols-4{grid-template-columns:repeat(4,1fr);}
.cols-3{grid-template-columns:repeat(3,1fr);}
.cols-2{grid-template-columns:repeat(2,1fr);}
@media(max-width:1100px){.cols-4{grid-template-columns:repeat(2,1fr);}}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;}
.stat .label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em;}
.stat .value{font-size:26px;font-weight:700;margin-top:6px;}
.stat .sub{font-size:12px;color:var(--muted);margin-top:4px;}

/* Tables */
table.tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;}
table.tbl th,table.tbl td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);font-size:13px;}
table.tbl th{background:#f8fafc;color:var(--muted);font-weight:600;text-transform:uppercase;font-size:11px;letter-spacing:.03em;}
table.tbl tr:last-child td{border-bottom:0;}
table.tbl tr:hover td{background:#f8fafc;}
.tbl-wrap{overflow-x:auto;}

/* Badge */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:11px;font-weight:600;line-height:18px;white-space:nowrap;}
.badge.ok{background:#dcfce7;color:var(--ok);}
.badge.warn{background:#fef3c7;color:var(--warn);}
.badge.bad{background:#fee2e2;color:var(--bad);}
.badge.info{background:#dbeafe;color:var(--info);}
.badge.muted{background:#e2e8f0;color:var(--muted);}

/* Forms */
.field{margin-bottom:14px;}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:5px;}
.field input,.field select,.field textarea{width:100%;padding:9px 11px;border:1px solid var(--line);
  border-radius:8px;font-size:14px;font-family:inherit;background:#fff;}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid #bfdbfe;border-color:#60a5fa;}
.field .hint{font-size:12px;color:var(--muted);margin-top:4px;}
.row{display:flex;gap:14px;flex-wrap:wrap;}
.row .field{flex:1;min-width:180px;}

/* Buttons */
.btn{display:inline-block;padding:8px 16px;border-radius:8px;border:1px solid transparent;font-size:13px;
  font-weight:600;cursor:pointer;text-decoration:none;background:#e2e8f0;color:var(--ink);}
.btn:hover{filter:brightness(.97);}
.btn.primary{background:var(--side-active);color:#fff;}
.btn.danger{background:var(--bad);color:#fff;}
.btn.ghost{background:#fff;border-color:var(--line);}
.btn.sm{padding:5px 10px;font-size:12px;}

/* Toolbar */
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap;}
.toolbar .search{display:flex;gap:8px;}
.toolbar .search input{padding:8px 11px;border:1px solid var(--line);border-radius:8px;min-width:240px;}

/* Flash */
.flash{padding:11px 16px;border-radius:8px;margin-bottom:16px;font-size:14px;border:1px solid;}
.flash.ok{background:#dcfce7;border-color:#bbf7d0;color:#166534;}
.flash.warn{background:#fef3c7;border-color:#fde68a;color:#92400e;}
.flash.bad{background:#fee2e2;border-color:#fecaca;color:#991b1b;}

/* Misc */
.muted{color:var(--muted);}
.right{text-align:right;}
.center{text-align:center;}
.nowrap{white-space:nowrap;}
.mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;}
.empty{padding:40px;text-align:center;color:var(--muted);}
.pager{display:flex;gap:6px;margin-top:16px;justify-content:flex-end;}
.pager a,.pager span{padding:6px 11px;border:1px solid var(--line);border-radius:7px;text-decoration:none;color:var(--ink);background:#fff;}
.pager .cur{background:var(--side-active);color:#fff;border-color:var(--side-active);}
h2.sec{font-size:15px;margin:24px 0 12px;}

/* Login */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);}
.login-box{background:#fff;padding:32px;border-radius:14px;width:340px;box-shadow:0 10px 40px rgba(0,0,0,.3);}
.login-box .brand{border:0;padding:0 0 18px;color:var(--ink);font-size:22px;}
.login-box .brand span{color:var(--side-active);}