body {
    background-color: #f4f6fa;
    font-family: "Segoe UI", sans-serif;
}

/* Header */
.dop-header {
    background: linear-gradient(135deg, #002a66, #004c9a);
    border-bottom: 5px solid #1d64c2;
}

.dop-logo {
    height: 80px;
}

/* Cards */
.tool-card {
    border-radius: 12px;
    overflow: hidden;
    transition: transform .2s, box-shadow .2s;
    border: none;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 18px rgba(0,0,0,0.15);
}

.text-dop {
    color: #003c85;
    font-weight: 600;
}