:root {
    font-family: Arial, sans-serif;
    color: #1f2937;
    background: #f5f7fa;
}

body {
    margin: 0;
}

.container {
    max-width: 960px;
    margin: 48px auto;
    padding: 0 24px;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.portal-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
    padding: 16px 0;
}

.brand {
    font-weight: 700;
}

.result {
    font-size: 48px;
    font-weight: 700;
    margin: 32px 0;
}

.button {
    display: inline-block;
    margin-top: 24px;
    padding: 12px 18px;
    border-radius: 8px;
    background: #1f2937;
    color: white;
    text-decoration: none;
}

.button:hover {
    opacity: 0.9;
}