body {
    font-family: Arial, sans-serif;
    background: #e3f2fd;
    color: #1565c0;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 400px;
    margin: 40px auto;
    background: #fff;
    padding: 24px 32px 32px 32px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(21,101,192,0.08);
    color: #1565c0;
}
h2 {
    text-align: center;
    margin-bottom: 24px;
    color: #1565c0;
}
.form-group {
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
}
.form-group label {
    margin-bottom: 6px;
    font-weight: 500;
    color: #1565c0;
}
input, select, textarea {
    padding: 8px 10px;
    border: 1.5px solid #90caf9;
    border-radius: 4px;
    font-size: 1rem;
    background: #f5faff;
    color: #1565c0;
    transition: border-color 0.2s, background 0.2s;
}
input:focus, select:focus, textarea:focus {
    border-color: #1976d2;
    outline: none;
    background: #e3f2fd;
}
input.invalid, select.invalid, textarea.invalid {
    border-color: #e53935;
    background: #fff3f3;
}
.error {
    color: #e53935;
    font-size: 0.92em;
    margin-top: 2px;
    min-height: 18px;
}
.checkbox-group {
    flex-direction: row;
    align-items: center;
}
.checkbox-group label {
    margin: 0 0 0 8px;
    font-weight: normal;
    color: #1565c0;
}
button[type="submit"] {
    width: 100%;
    padding: 10px;
    background: #1976d2;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    cursor: pointer;
    margin-top: 10px;
    transition: background 0.2s, color 0.2s;
    font-weight: bold;
}
button[type="submit"]:disabled {
    background: #90caf9;
    color: #fff;
    cursor: not-allowed;
}
@media (max-width: 500px) {
    .container {
        padding: 16px 8px 24px 8px;
    }
}