* { box-sizing: border-box; }
body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    background: #f0f4f8;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 500px;
    margin: auto;
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
}
h2 { color: #1e3a8a; margin-bottom: 5px; }
.sub { color: #666; margin-top: 0; font-size: 14px; }
label {
    display: block; margin-top: 12px; font-weight: 600;
    font-size: 14px; color: #333;
}
input, select {
    width: 100%; padding: 9px; margin-top: 5px;
    border: 1px solid #ccc; border-radius: 6px; font-size: 14px;
}
input:focus, select:focus { outline: none; border-color: #1e3a8a; }
button, .btn-secondary {
    display: inline-block; text-align: center; text-decoration: none;
    margin-top: 18px; padding: 11px 18px; border: none;
    border-radius: 6px; font-size: 15px; cursor: pointer;
    background: #1e3a8a; color: #fff;
}
.btn-secondary { background: #64748b; margin-left: 6px; }
button:hover { background: #142a66; }
.btn-secondary:hover { background: #475569; }