body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f6f9;
    color: #222;
}

.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background: #1f2937;
    color: #fff;
    padding: 20px;
}

.sidebar h2 {
    margin-top: 0;
}

.sidebar a {
    display: block;
    color: #fff;
    text-decoration: none;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.content {
    flex: 1;
    padding: 24px;
}

.card {
    background: #fff;
    border-radius: 10px;
    padding: 18px;
    margin-bottom: 20px;
    box-shadow: 0 1px 6px rgba(0,0,0,.08);
}

.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.stat {
    background: #fff;
    border-radius: 10px;
    padding: 18px;
    box-shadow: 0 1px 6px rgba(0,0,0,.08);
}

.stat h3 {
    margin: 0 0 8px;
    font-size: 14px;
    color: #666;
}

.stat .num {
    font-size: 28px;
    font-weight: bold;
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

table th, table td {
    padding: 10px;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
    vertical-align: top;
}

input, select, textarea, button {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    margin-top: 6px;
    margin-bottom: 14px;
}

textarea {
    min-height: 100px;
}

button {
    background: #2563eb;
    color: white;
    border: 0;
    border-radius: 6px;
    cursor: pointer;
}

.badge {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 20px;
    color: #fff;
    font-size: 12px;
}

.badge.blue { background: #2563eb; }
.badge.orange { background: #ea580c; }
.badge.purple { background: #7c3aed; }
.badge.green { background: #16a34a; }
.badge.gray { background: #6b7280; }

.small {
    color: #666;
    font-size: 13px;
}

.login-box {
    max-width: 420px;
    margin: 80px auto;
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 1px 6px rgba(0,0,0,.08);
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.kpi {
    background: #fff;
    border-radius: 10px;
    padding: 18px;
    box-shadow: 0 1px 6px rgba(0,0,0,.08);
}

.kpi h3 {
    margin: 0 0 8px;
    font-size: 14px;
    color: #666;
}

.kpi .num {
    font-size: 28px;
    font-weight: bold;
}

.notice-badge {
    display: inline-block;
    margin-left: 8px;
    padding: 3px 8px;
    border-radius: 999px;
    background: #dc2626;
    color: #fff;
    font-size: 12px;
    line-height: 1;
}

.table-actions a {
    margin-right: 8px;
}

input[type="file"] {
    padding: 8px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
}

.badge.red { background: #dc2626; }

.card alert-box {
    padding: 14px;
}

.overdue-row td {
    background: #fff7ed;
}

.badge.red { background: #dc2626; }

.overdue-row td {
    background: #fff7ed;
}

.table-actions a,
.table-actions form {
    margin-right: 6px;
}

.table-actions form {
    display: inline-block;
}