.sim-activation-form {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.sim-activation-form .form-group {
    margin-bottom: 20px;
}

.sim-activation-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.sim-activation-form input[type="text"],
.sim-activation-form input[type="email"],
.sim-activation-form input[type="date"],
.sim-activation-form select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

/* Make EID and IMEI2 fields wider to accommodate 32 digits */
.sim-activation-form #eid,
.sim-activation-form #imei2 {
    width: 100%;
    min-width: 284px;
    font-family: monospace;
    letter-spacing: 0.3px;
}

.sim-activation-form .half-width-field {
    width: 48%;
    display: inline-block;
    margin-right: 4%;
}

.sim-activation-form .half-width-field:last-child {
    margin-right: 0;
}

.sim-activation-form .radio-group {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}

.sim-activation-form .radio-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: normal;
    cursor: pointer;
}

.sim-activation-form .submit-button {
    position: relative;
    min-width: 120px;
    padding: 10px 20px;
    background-color: #0073aa;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.sim-activation-form .submit-button:hover {
    background-color: #005177;
}

.sim-activation-form .submit-button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.sim-activation-form .spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    margin-left: 10px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.sim-activation-form .form-messages {
    margin-top: 20px;
}

.sim-activation-form .error-message {
    padding: 10px 15px;
    margin-bottom: 10px;
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ef9a9a;
    border-radius: 4px;
}

.sim-activation-form .success-message {
    padding: 10px 15px;
    margin-bottom: 10px;
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
    border-radius: 4px;
}

.sim-activation-form .message {
    padding: 10px;
    margin: 10px 0;
    border-radius: 4px;
}

.sim-activation-form .message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.sim-activation-form .message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.sim-activation-form em {
    display: block;
    font-size: 0.9em;
    color: #666;
    margin: 5px 0;
}

.sim-activation-form input[readonly] {
    background-color: #f5f5f5;
    cursor: not-allowed;
}

.sim-activation-form .error-field {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.sim-activation-form .error-field:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

@media (max-width: 768px) {
    .sim-activation-form .half-width-field {
        width: 100%;
        margin-right: 0;
        margin-bottom: 15px;
    }
    .sim-activation-form #eid,
    .sim-activation-form #imei2 {
        font-size: 13px;
    }
}