:root {
    --blue: #0056B3;
    --green: #1B8A5A;
    --bg: #F5F7FA;
    --card: #FFFFFF;
    --text: #1F2937;
    --muted: #6B7280;
    --border: #E5E7EB;
    --danger: #B91C1C;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Inter, Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
header {
    background: var(--blue);
    color: #fff;
    padding: 18px 24px;
    box-shadow: 0 2px 10px rgba(0,0,0,.12);
}
header h1 { margin: 0; font-size: 22px; }
nav { margin-top: 10px; display: flex; gap: 10px; flex-wrap: wrap; }
nav a {
    color: #fff;
    text-decoration: none;
    background: rgba(255,255,255,.16);
    padding: 8px 12px;
    border-radius: 10px;
}
main { max-width: 1180px; margin: 24px auto; padding: 0 16px 48px; }
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px;
    box-shadow: 0 4px 18px rgba(31,41,55,.06);
    margin-bottom: 18px;
}
.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px; }
.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-12 { grid-column: span 12; }
label { display: block; font-weight: 700; margin-bottom: 6px; }
input, select, textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 15px;
    background: #fff;
}
textarea { min-height: 90px; }
button, .btn {
    border: 0;
    background: var(--blue);
    color: #fff;
    border-radius: 10px;
    padding: 11px 15px;
    cursor: pointer;
    font-weight: 700;
    text-decoration: none;
    display: inline-block;
}
.btn-secondary { background: var(--muted); }
.btn-success { background: var(--green); }
.btn-danger { background: var(--danger); }
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { text-align: left; padding: 11px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: #EEF4FF; color: #102A43; }
.badge { display: inline-block; padding: 4px 9px; border-radius: 99px; background: #EAF2FF; color: var(--blue); font-size: 12px; font-weight: 800; }
.help { color: var(--muted); font-size: 13px; margin-top: 6px; }
.material-row { border: 1px dashed var(--border); padding: 12px; border-radius: 12px; margin-bottom: 10px; background: #FAFBFC; }
.alert { padding: 12px; border-radius: 10px; background: #FFF7ED; border: 1px solid #FED7AA; }
@media (max-width: 800px) {
    .grid { grid-template-columns: 1fr; }
    .col-2,.col-3,.col-4,.col-6,.col-12 { grid-column: span 1; }
}