:root {
    --brand-950: #0b1f33;
    --brand-900: #102a43;
    --brand-700: #176b87;
    --brand-600: #167c80;
    --accent: #1fa39a;
    --accent-soft: #e7f7f5;
    --surface: #ffffff;
    --surface-muted: #f4f7fb;
    --border: #dce6ef;
    --text: #1c2b36;
    --muted: #607484;
    --danger: #b42318;
    --shadow-sm: 0 6px 20px rgba(15, 42, 67, .08);
    --shadow-lg: 0 18px 55px rgba(15, 42, 67, .14);
}

html { min-height: 100%; }
body.premium-body,
body.premium-admin {
    min-height: 100vh;
    margin: 0;
    color: var(--text);
    font-family: "Segoe UI", Arial, sans-serif;
    background: radial-gradient(circle at top left, rgba(31,163,154,.12), transparent 34%), linear-gradient(145deg, #eef4f9 0%, #f8fbfd 48%, #edf6f5 100%);
}

.site-frame { width: min(1180px, calc(100% - 32px)); margin: 28px auto; }
.site-header { overflow: hidden; color: #fff; border-radius: 20px 20px 0 0; background: linear-gradient(125deg, var(--brand-950), var(--brand-700) 70%, var(--brand-600)); box-shadow: var(--shadow-lg); }
.brand-row { display: flex; align-items: center; justify-content: center; gap: 16px; min-height: 118px; padding: 18px 24px 12px; text-align: left; }
.brand-row .ntruhs_img { width: 76px; height: 76px; padding: 6px; object-fit: contain; border-radius: 50%; background: rgba(255,255,255,.95); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.brand-copy .udb { margin: 0 0 5px; color: #fff; font-size: 27px; line-height: 1.1; letter-spacing: .3px; }
.brand-copy .ntruhs { margin: 0; color: #dcecf2; font-size: 14px; font-weight: 500; letter-spacing: .3px; }
.brand-kicker { margin-bottom: 5px; color: #90e0d8; font-size: 11px; font-weight: 700; letter-spacing: 1.7px; text-transform: uppercase; }

.site-nav { padding: 0 22px 15px; }
.site-nav .topnav { display: flex; justify-content: center; gap: 7px; overflow: visible; padding: 0; }
.site-nav .topnav a { float: none; margin: 0; padding: 9px 17px; color: #edf8fa; font-size: 14px; font-weight: 600; letter-spacing: .2px; border: 1px solid rgba(255,255,255,.15); border-radius: 9px; background: rgba(255,255,255,.08); transition: .2s ease; }
.site-nav .topnav a:hover, .site-nav .topnav a:focus { color: #fff; text-decoration: none; background: rgba(31,163,154,.8); transform: translateY(-1px); }
.site-nav .topnav .icon { display: none; }

.site-content { min-height: 420px; padding: 24px; background: var(--surface); box-shadow: var(--shadow-lg); }
.site-footer { display: flex; justify-content: space-between; gap: 16px; padding: 17px 24px; color: #bbd0db; font-size: 12px; border-radius: 0 0 20px 20px; background: var(--brand-950); box-shadow: var(--shadow-lg); }

/* Shared page surfaces */
.mainmasterbg { margin: 0; background: transparent; }
.submitform, .regBlock, .table-bordered.bg-info, .panel, .well, .jumbotron, .form-horizontal {
    border: 1px solid var(--border) !important;
    border-radius: 14px !important;
    background: var(--surface) !important;
    box-shadow: var(--shadow-sm);
}
.submitform { padding: 18px !important; }
.regBlock, .table-bordered.bg-info, .well { margin-bottom: 16px !important; padding: 18px !important; }
.hedinga, h4.text-center[style] { padding: 11px 15px !important; color: #fff !important; border-radius: 10px 10px 0 0; background: linear-gradient(115deg, var(--brand-900), var(--brand-700)) !important; font-family: "Segoe UI", Arial, sans-serif !important; letter-spacing: .2px; }

.form-control, input[type="text"], input[type="password"], input[type="email"], input[type="number"], input[type="date"], select, textarea {
    min-height: 38px; color: var(--text); border: 1px solid #c8d6e1; border-radius: 8px; box-shadow: none; transition: border-color .2s, box-shadow .2s;
}
.form-control:focus, input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: 0; box-shadow: 0 0 0 3px rgba(31,163,154,.15); }
input[type="file"] { max-width: 100%; padding: 7px; color: var(--muted); border: 1px dashed #9fb6c5; border-radius: 8px; background: #f8fbfd; }
label, .label_lbl { color: #263d4d; font-weight: 600; }

.btn, input[type="submit"], input[type="button"] { min-height: 38px; padding: 8px 16px !important; font-weight: 600; border: 0; border-radius: 8px !important; transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover, input[type="submit"]:hover, input[type="button"]:hover { transform: translateY(-1px); box-shadow: 0 7px 18px rgba(16,42,67,.17); }
.btn-success { background: var(--brand-600) !important; }
.btn-primary, .btn-info { background: var(--brand-700) !important; }
.btn-danger { background: #b8463d !important; }

.table-responsive { border: 0; }
.table { margin-bottom: 16px; background: #fff; }
.table > thead > tr > th { padding: 11px 10px; color: #17354a; border-color: #cfe0e8; background: var(--accent-soft); vertical-align: middle; }
.table > tbody > tr > td { padding: 10px; border-color: #e2eaf0; vertical-align: middle; }
.table > tbody > tr:nth-child(even) { background: #f8fbfd; }
.table > tbody > tr:hover { background: #edf8f7; }

.alert, .validation-summary-errors { border: 0; border-left: 4px solid var(--brand-700); border-radius: 9px; box-shadow: var(--shadow-sm); }
.text-danger, .valdation, span[style*="color: red"] { color: var(--danger) !important; }
a { color: #116d85; }
a:hover { color: #0b4f64; }

/* Existing administration theme enhancements */
body.premium-admin .wthree_agile_admin_info { min-height: 100vh; background: transparent; }
body.premium-admin .w3_agileits_top_nav { position: sticky; top: 0; z-index: 1000; box-shadow: 0 10px 30px rgba(11,31,51,.16); }
body.premium-admin .gn-menu-main { color: #fff; border: 0; background: linear-gradient(115deg, var(--brand-950), var(--brand-700)); }
body.premium-admin .gn-menu-main a, body.premium-admin .w3l_search p, body.premium-admin .w3l_search p a { color: #eef9fa; }
body.premium-admin .gn-menu-wrapper { border: 0; background: var(--brand-900); box-shadow: 12px 10px 30px rgba(11,31,51,.18); }
body.premium-admin .gn-menu li a { color: #dcecf2; border-bottom-color: rgba(255,255,255,.08); }
body.premium-admin .gn-menu li a:hover { color: #fff; background: var(--brand-700); }
body.premium-admin .admin-content { width: min(1380px, calc(100% - 38px)); min-height: calc(100vh - 116px); margin: 28px auto; padding: 22px; border: 1px solid var(--border); border-radius: 16px; background: rgba(255,255,255,.96); box-shadow: var(--shadow-lg); }
body.premium-admin .second.logo { font-weight: 700; letter-spacing: .4px; }
body.premium-admin .second.logo img { width: 44px !important; height: 44px; margin-right: 8px; padding: 4px; border-radius: 50%; background: #fff; }
.admin-footer { padding: 15px 24px; color: var(--muted); font-size: 12px; text-align: center; }

@media (max-width: 767px) {
    .site-frame { width: calc(100% - 16px); margin: 8px auto; }
    .site-header { border-radius: 14px 14px 0 0; }
    .brand-row { min-height: 96px; padding: 14px; text-align: center; }
    .brand-row .ntruhs_img { width: 58px; height: 58px; }
    .brand-copy .udb { font-size: 21px; }
    .site-nav { padding: 0 12px 12px; }
    .site-nav .topnav { display: block; }
    .site-nav .topnav a { display: none; }
    .site-nav .topnav a.icon { display: block; text-align: center; }
    .site-nav .topnav.responsive a { display: block; margin-top: 5px; text-align: left; }
    .site-nav .topnav.responsive a.icon { position: static; text-align: center; }
    .site-content { padding: 12px; }
    .site-footer { display: block; padding: 14px; text-align: center; }
    .site-footer span { display: block; margin-top: 5px; }
    body.premium-admin .admin-content { width: calc(100% - 16px); margin: 14px auto; padding: 12px; }
    .table { min-width: 620px; }
    .table-responsive .table { min-width: 620px; }
}