* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: #e5e7eb;
}

.header {
    background: #111827;
    padding: 18px 24px;
    border-bottom: 1px solid #334155;
}

.header h1 {
    margin: 0;
    font-size: 24px;
    color: #ffffff;
}

.header p {
    margin: 8px 0 0;
    color: #cbd5e1;
}

.header a {
    color: #93c5fd;
    text-decoration: none;
    margin-right: 10px;
}

.container {
    max-width: 1180px;
    margin: 24px auto;
    padding: 0 16px;
}

.card {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 18px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

.card h2 {
    margin-top: 0;
    color: #ffffff;
}

.btn {
    display: inline-block;
    background: #2563eb;
    color: #ffffff !important;
    padding: 10px 15px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    border: none;
    cursor: pointer;
}

.btn.secondary {
    background: #475569;
}

.btn.danger {
    background: #dc2626;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

.table th,
.table td {
    border: 1px solid #334155;
    padding: 10px;
    text-align: left;
    vertical-align: top;
}

.table th {
    background: #0f172a;
    color: #ffffff;
}

input,
select,
textarea {
    width: 100%;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #475569;
    background: #0f172a;
    color: #ffffff;
    margin-top: 6px;
}

label {
    display: block;
    margin-bottom: 12px;
    color: #cbd5e1;
}

.success {
    background: #064e3b;
    border: 1px solid #10b981;
    color: #d1fae5;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 14px;
}

.warning {
    background: #7f1d1d;
    border: 1px solid #ef4444;
    color: #fee2e2;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 14px;
}

.status-ok {
    color: #86efac;
    font-weight: bold;
}

.status-warn {
    color: #fde68a;
    font-weight: bold;
}

.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.stat {
    background: #0f172a;
    padding: 16px;
    border-radius: 12px;
    border: 1px solid #334155;
}

.stat strong {
    display: block;
    font-size: 26px;
    color: #ffffff;
}

@media (max-width: 800px) {
    .grid {
        grid-template-columns: 1fr;
    }
}