:root{--sidebar-w:245px}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f4f7fb;color:#172033}
a{text-decoration:none;color:inherit}
img{max-width:100%}
.app{min-height:100vh}

/* Sidebar */
.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar-w);background:#111827;color:#fff;padding:22px 14px;display:flex;flex-direction:column;z-index:30;overflow-y:auto}
.brand{font-size:20px;padding:10px 12px 28px}
.sidebar nav{display:grid;gap:6px}
.sidebar nav a,.logout{padding:12px;border-radius:9px;color:#d1d5db}
.sidebar nav a:hover,.logout:hover{background:#1f2937;color:#fff}
.sidebar nav a.active{background:#2563eb;color:#fff}
.logout{margin-top:auto}
.backdrop{display:none;position:fixed;inset:0;background:#0006;z-index:25}
.backdrop.show{display:block}

/* Layout */
.main{margin-left:var(--sidebar-w);min-width:0}
.topbar{height:64px;background:#fff;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;gap:16px;padding:0 20px;position:sticky;top:0;z-index:10}
.topbar b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topuser{margin-left:auto;color:#6b7280;white-space:nowrap;display:flex;align-items:center;gap:6px}
.menu{display:none;border:0;background:none;font-size:22px;cursor:pointer;padding:4px 8px}
.content{padding:25px;max-width:1400px;margin:auto}

/* Hero & stat grid */
.hero{background:linear-gradient(135deg,#1d4ed8,#3b82f6);color:white;padding:28px;border-radius:16px;margin-bottom:20px}
.hero h1{margin:0 0 8px;font-size:clamp(20px,4vw,28px)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
.stat,.card{background:white;border:1px solid #e5e7eb;border-radius:14px;padding:20px}
.stat{font-size:22px}
.stat strong{font-size:28px;display:block;margin:8px 0}
.muted{color:#6b7280;font-size:13px}
.card{margin-top:20px}
.cardhead{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.cardhead h2{margin:0}

/* Forms */
.toolbar{display:flex;gap:10px;flex-wrap:wrap}
.input,.select,.textarea{padding:11px;border:1px solid #d1d5db;border-radius:8px;font:inherit;width:100%;background:#fff}
.select-sm{padding:6px 8px;font-size:13px}
.toolbar .input{flex:1;min-width:220px}
.btn{display:inline-block;border:0;background:#2563eb;color:#fff;padding:10px 14px;border-radius:8px;font-weight:bold;cursor:pointer;font-size:14px}
.btn.secondary{background:#eef2ff;color:#1d4ed8}
.btn.danger{background:#fee2e2;color:#991b1b}
.btn-sm{padding:7px 10px;font-size:12px}
.inline-form{display:inline-block;margin:0}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.field label{display:block;font-weight:bold;font-size:14px;margin-bottom:6px}
.full{grid-column:1/-1}

/* Tables (responsive: convert to stacked cards on small screens) */
.table-wrap{overflow:auto}
.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:12px 9px;border-bottom:1px solid #e5e7eb;text-align:left;white-space:nowrap}

/* Badges / alerts */
.badge{background:#eff6ff;color:#1d4ed8;padding:5px 8px;border-radius:99px;font-size:12px}
.alert{padding:12px;border-radius:8px;margin-bottom:15px}
.success{background:#dcfce7;color:#166534}
.error{background:#fee2e2;color:#991b1b}
.empty{text-align:center;padding:35px;color:#6b7280}
.pdf{width:100%;height:75vh;border:1px solid #ddd;border-radius:8px}

/* Auth pages */
.auth{min-height:100vh;display:grid;place-items:center;background:#eff6ff;padding:20px}
.authbox{width:min(430px,100%);background:#fff;padding:30px;border-radius:16px;box-shadow:0 15px 40px #0001}
.authbox .field{margin-bottom:14px}
.center{text-align:center}

/* Statistics bar charts */
.statsrow{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:20px}
.statsrow .card{margin-top:0}
.barchart{display:grid;gap:12px;margin-top:14px}
.barrow{display:grid;grid-template-columns:130px 1fr auto;align-items:center;gap:10px}
.barlabel{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.barwrap{background:#f1f5f9;border-radius:99px;height:12px;overflow:hidden}
.bar{display:block;height:100%;background:#2563eb;border-radius:99px;min-width:4px;transition:width .3s}
.bar.alt{background:#0ea5e9}
.barvalue{font-size:12px;color:#6b7280;white-space:nowrap;text-align:right;min-width:70px}

/* ===== Responsive breakpoints ===== */
@media(max-width:1000px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .statsrow{grid-template-columns:1fr}
}
@media(max-width:850px){
  .sidebar{transform:translateX(-100%);transition:.25s}
  .sidebar.open{transform:none;box-shadow:0 0 40px #0006}
  .main{margin-left:0}
  .menu{display:block}
}
@media(max-width:700px){
  .form-grid{grid-template-columns:1fr}
  .barrow{grid-template-columns:90px 1fr auto}
  .barlabel{font-size:12px}
}
@media(max-width:600px){
  .content{padding:14px}
  .grid{grid-template-columns:1fr 1fr;gap:10px}
  .stat{padding:14px}
  .stat strong{font-size:22px}
  .topuser span.badge{display:none}
  .hero{padding:20px}
  .cardhead{flex-direction:column;align-items:flex-start}

  /* Stacked-card tables on mobile */
  .table thead{display:none}
  .table tr{display:block;border:1px solid #e5e7eb;border-radius:10px;margin-bottom:12px;padding:8px 12px}
  .table tr:first-child{display:none} /* header row (no <thead> used in markup) */
  .table td{display:flex;justify-content:space-between;gap:10px;white-space:normal;border-bottom:1px solid #f1f5f9;padding:8px 2px;text-align:right}
  .table td:last-child{border-bottom:0}
  .table td::before{content:attr(data-label);font-weight:bold;color:#374151;text-align:left}
  .table td:not([data-label])::before{content:''}
}
@media(max-width:420px){
  .grid{grid-template-columns:1fr}
}