:root{
  --primary:#1d5c9e; --primary-dark:#164a80; --bg:#f4f6f9; --panel:#fff;
  --border:#e1e6ec; --text:#22282f; --muted:#6b7684; --warn:#c7861a; --danger:#c0392b; --ok:#1f8a4c;
  --radius:10px;
  --tap:44px; /* minimum comfortable touch target */
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:'Segoe UI',Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);
  -webkit-tap-highlight-color:transparent;}
a{color:var(--primary);text-decoration:none}
h1,h2,h3{margin:0 0 12px}

/* Auth pages */
.auth-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#1d5c9e,#123b63);padding:16px;}
.auth-card{background:#fff;padding:28px 22px;border-radius:var(--radius);width:100%;max-width:380px;box-shadow:0 10px 30px rgba(0,0,0,.2);}
.auth-card h1{font-size:20px;color:var(--primary-dark);text-align:center}
.auth-sub{text-align:center;color:var(--muted);margin-bottom:20px}
.auth-footer{text-align:center;margin-top:14px;font-size:14px}
label{display:block;margin-bottom:16px;font-size:14px;color:var(--muted)}
input,select,textarea{
  width:100%;padding:12px 10px;margin-top:6px;border:1px solid var(--border);border-radius:8px;
  font-size:16px; /* 16px prevents iOS Safari auto-zoom on focus */
  font-family:inherit;background:#fff;color:var(--text);min-height:var(--tap);
}
textarea{min-height:auto}
select{-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><polygon points='0,0 10,0 5,6' fill='%236b7684'/></svg>");background-repeat:no-repeat;background-position:right 12px center;padding-right:30px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 16px;min-height:var(--tap);border-radius:8px;border:1px solid var(--border);
  background:#fff;color:var(--text);cursor:pointer;font-size:15px;line-height:1.2;
  touch-action:manipulation;
}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-block{width:100%}
.btn-sm{padding:8px 12px;font-size:13.5px;min-height:38px}
.btn-danger{background:var(--danger);border-color:var(--danger);color:#fff}
.alert{padding:12px 14px;border-radius:8px;margin-bottom:16px;font-size:14.5px;line-height:1.4}
.alert-error{background:#fdecea;color:var(--danger);border:1px solid #f5c6c0}
.alert-warn{background:#fdf4e3;color:var(--warn);border:1px solid #f0dba5}
.alert-ok{background:#e8f6ee;color:var(--ok);border:1px solid #bfe8cf}

/* App shell */
.app-shell{display:flex;min-height:100vh;position:relative}
.sidebar{
  width:260px;background:#122842;color:#dce6f2;flex-shrink:0;
  transition:transform .25s ease;
}
.sidebar-brand{padding:20px 18px;font-weight:700;font-size:16px;border-bottom:1px solid rgba(255,255,255,.1)}
.sidebar-brand span{font-weight:400;font-size:12px;opacity:.7}
.sidebar nav{display:flex;flex-direction:column;padding:8px 0}
.nav-link{color:#c4d3e5;padding:13px 18px;font-size:15px;border-left:3px solid transparent;min-height:var(--tap);display:flex;align-items:center;}
.nav-link:hover{background:rgba(255,255,255,.06)}
.nav-link.active{background:rgba(255,255,255,.1);color:#fff;border-left-color:var(--primary)}
.main-col{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{display:flex;align-items:center;gap:10px;padding:12px 16px;background:#fff;border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:15;flex-wrap:wrap;}
.page-title{font-size:17px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar-right{display:flex;align-items:center;gap:8px;font-size:14px;flex-shrink:0}
.topbar-collect{white-space:nowrap}
.admin-name{white-space:nowrap}
.menu-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer;padding:6px 8px;min-height:var(--tap);min-width:var(--tap);}
.content{padding:16px;flex:1;min-width:0}
.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:18;}

.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-bottom:20px}
.stat-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:14px}
.stat-card.stat-warn{border-color:#f0dba5;background:#fffaf0}
.stat-value{font-size:20px;font-weight:700}
.stat-label{font-size:12.5px;color:var(--muted);margin-top:4px}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:18px}
@media(max-width:900px){.two-col{grid-template-columns:1fr}}

.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:14px;
  overflow-x:auto;
}
.data-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:560px}
.data-table th,.data-table td{padding:10px 8px;border-bottom:1px solid var(--border);text-align:left}
.data-table th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;white-space:nowrap}
.data-table td{white-space:nowrap}
.badge{background:#eef2f7;padding:4px 9px;border-radius:20px;font-size:12px;white-space:nowrap;display:inline-block}
.quick-actions{display:flex;gap:8px;flex-wrap:wrap}

.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}
@media(max-width:700px){.form-grid{grid-template-columns:1fr}}
.form-actions{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap}
.form-actions .btn{flex:1 1 auto;min-width:120px}

/* Mobile: sidebar becomes a full-height overlay drawer */
@media(max-width:820px){
  .sidebar{
    position:fixed;z-index:20;height:100%;top:0;left:0;
    transform:translateX(-100%);
    width:min(280px, 84vw);
    box-shadow:2px 0 20px rgba(0,0,0,.2);
  }
  .sidebar.open{transform:translateX(0)}
  .sidebar-backdrop.open{display:block}
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
  .page-title{font-size:16px}
  .admin-name{display:none}
  .content{padding:12px}
  .panel{padding:12px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .form-actions .btn{flex:1 1 100%}
}

@media(max-width:480px){
  .auth-card{padding:22px 18px}
  .topbar{padding:10px 12px}
  .quick-actions .btn{flex:1 1 100%}
}

@media print{
  .menu-toggle,.sidebar,.sidebar-backdrop,.topbar-right{display:none}
}